JP3520945B2 - Equipment and method for removing oil and moisture from metal scrap - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil component generated in a factory or the like for manufacturing or processing metal strips and metal plates made of various metals and alloys including steel strips and steel plates. The present invention relates to equipment and method for removing oil and water and foreign matter from metal scraps containing water and foreign matter.

[0002]

2. Description of the Related Art In a factory that manufactures various metal products such as stainless steel strips and steel plates, brass and aluminum metal strips, metal plates and metal rods, not only metal scraps generated in the factory Various kinds of metal scraps including metal scraps generated outside are analyzed, classified and blended as appropriate,
It is charged as a main raw material into a melting facility such as an electric furnace, melted at high temperature to obtain a metal melt, and this metal melt is refined to a quality level such as a desired chemical composition, and then finally applied. Manufactures metal products. That is, the metal melt obtained by melting the metal scraps in this way is economically used for resource saving while being effectively used.

The metal scrap is a factory for manufacturing and processing metal strips such as stainless steel strips and stainless steel plates, metal strips and metal plates made of other metals such as brass and aluminum, and metal products such as metal rods. It is generated by grinding or polishing the surface in order to make the surface beautiful, shape it, and remove flaws on the surface. that time,
As the grinding oil or the polishing oil, oils such as mineral oils such as second oils and third oils or animal oils are used. Alternatively, water or a chemical solution is used as an aqueous abrasive, cutting agent or cleaning agent. The generated metal scraps are in the form of fluffs, are generated in a state of containing a large amount of oil and water, and are retained as they are.

In addition, when such various metal materials are subjected to, for example, electric discharge machining, cutting machining, lathe machining and hole machining, the oil is mainly used for cooling and lubricating action.
Water and chemicals are used. Metal scraps such as grinding scraps or polishing scraps generated in such factories are also fluffy, including powdery or fibrous or peculiar indefinite shape, and are generated in a state of containing a large amount of oil and water, And keep it as it is.

In general, metal scraps are often subjected to rough treatment and handling at a low cost, so that the transport method and the storage method are inappropriate or the storage is prolonged. In this case, it tends to be moist and contain a large amount of water. Furthermore, it is likely to be directly exposed to rainwater or to infiltrate due to water invading from the floor of the storage location to contain water. Moreover, although it depends on the storage method, once it contains water, it is not dried easily and is retained forever.

Further, in the field of food processing, for example, expensive nickel is used as a catalyst for accelerating various chemical reactions, and a supporting metal material or a reaction metal tank for the catalyst is used. The scraps are not only amorphous, but also contain a large amount of animal fats and oils.

[0007] In order to effectively reuse the metal scrap containing the oil and water thus generated as a resource and to reuse the contained oil as much as possible, It is necessary to sufficiently separate and remove the oil and water that are present. When attempting to obtain a molten metal by melting metal waste that has not sufficiently separated and removed the oil into a melting facility such as the above-described electric furnace and melting at high temperature,
There is a risk of abnormal combustion such as explosive combustion.

[0008] Also, when water is contained, there is a risk of steam explosion when it is charged into a melting facility such as an electric furnace and rapidly heated and melted, and hydrogen is absorbed by gas due to water. It is easy for quality deterioration such as brittleness and defects to occur. In refining the molten metal to a quality level such as the desired chemical composition accompanied by various metallurgical reactions, water that imposes an extra burden and lowers the quality level is brought into the melting and refining process as much as possible. It violates the basic principle of avoiding it.

As a conventional technique for removing oil from metal scraps in order to solve such a problem, for example, Japanese Patent Application Laid-Open No. 7-118767 discloses that metal scraps containing oil are partially separated by centrifugation. There is disclosed a method in which a molded product formed by compression molding after being removed by a means is heated under reduced pressure by a vacuum deoiling means to remove an oil component. Further, in Japanese Unexamined Patent Publication No. 7-126774, metal scrap containing oil and water is compression molded after part of the oil and water is removed by a centrifuge, and the formed product is vacuum deoiled. By the means, a method of removing oil and water by heating under reduced pressure is disclosed.

In these conventional techniques, when the metal scrap is charged into the melting equipment such as the electric furnace to obtain the molten metal, the amount of oil and the amount of water can be prevented so that the abnormal combustion and steam explosion can be prevented. In order to remove oil and water from metal scraps, heating is performed under reduced pressure to deoil under reduced pressure.
However, this vacuum deoiling process requires a long processing time and is expensive, so it is preferable to remove oil and water as much as possible before the vacuum deoiling process. ing.

[0011]

[Patent Document 1] Japanese Unexamined Patent Publication No.
In the prior art disclosed in Japanese Patent Laid-Open No. 118767 and Japanese Patent Application Laid-Open No. 7-126764, even if the metal scraps from which oil and water are to be removed are metal scraps having different properties, they are treated as the same metal scrap in the same treatment step. Oil and water are removed. Therefore, unnecessary processing may be performed and processing efficiency may be reduced.

[0012] For example, when a large amount of oil content is contained in the metal scraps, it is preferable to mechanically remove the oil content by the centrifuging means and then form the molded product in order to reduce the load on the subsequent vacuum deoiling means. In other words, the centrifugal separation means can remove a large amount of oil in a short time when the amount of oil contained in the metal scraps is large, and is low in cost, as compared with the case where the oil is removed only by the vacuum deoiling means. The processing efficiency can be improved in terms of time and economy.

However, when the oil content of the metal scraps is small, the amount of oil that can be removed by the centrifugal separation means is small, and the amount of oil that must be removed by the vacuum deoiling means is treated by the centrifugal separation means. There is almost no difference depending on whether or not. On the contrary, the processing by the centrifuging means consumes wasteful time and power, and reduces the processing efficiency in terms of time and economy.

Therefore, an object of the present invention is to provide a facility and a method for removing oil and water from metal scraps, which can improve the processing efficiency by selecting a treatment step according to the properties of the metal scraps. is there.

[0015]

According to a first aspect of the present invention, a first raw material composed of fluffy metal scraps containing oil and water is centrifuged to remove one of oil and water from the first raw material. Part for removing parts, first molding means for forming a molded product by compression molding metal scrap from which part of oil content and water content has been removed by the centrifugal separation means, and oil content, water content, and granular A second foreign material removing means for removing the foreign matter from the second raw material by vibrating a second raw material made of fluffy metal waste containing the foreign matter, and a metal waste having the foreign matter removed by the first foreign matter removing means. A second molding means for compression molding to form a molded article, and each molded article formed by the first and second molding means are placed in an airtight heating chamber and heated under reduced pressure. Reduces the removal of residual oil and water from the molding It is characterized by including deoiling means and oil / water recovery means for guiding vaporized vapor of oil and water in the heating chamber of the vacuum deoiling means and cooling the vapor to recover the oil and moisture. This equipment removes oil and water from metal scraps. According to the present invention, the metal scrap from which a part of the oil and water has been removed by the centrifugal separation means from the first raw material composed of the metal scrap containing oil and water is
It is compression molded into a molded product by the first molding means. Also,
The metal scrap from which the foreign material has been removed by the first foreign material removing means from the second raw material composed of metal scrap containing oil and water and a particulate foreign material is compression molded into a molded product by the second molding means. Each molded product compression-molded by the first and second molding means is heated under reduced pressure in the airtight heating chamber by the vacuum deoiling means to remove the residual oil and water. With this, the metal scrap containing a large amount of oil is treated as the first raw material, and the centrifugal separation means mechanically removes a part of the oil and water to form a molded product, thereby forming a molded product. The burden can be reduced and the processing efficiency can be improved. That is, when the amount of oil contained in the metal scrap is large, the amount of oil that can be removed in a short time by the centrifugal separation means is large, and at a low cost, as compared with the case where the oil content is removed only by the vacuum deoiling means, The processing efficiency can be improved in terms of time and cost. Further, the metal scrap containing a small amount of oil can be treated as the second raw material to improve the processing efficiency. That is, when the amount of oil contained in the metal scraps is small, the amount of oil that can be removed by the centrifugal separation unit is small, and the amount of oil that must be removed by the vacuum deoiling unit is treated by the centrifugal separation unit or not. Makes almost no difference. On the contrary, the processing by the centrifuging means consumes wasteful time and power, and reduces the processing efficiency in terms of time and economy. Therefore, the processing efficiency can be improved by forming the molded product without using the centrifugal separation means. In this way, the metal scraps can be processed in different processing steps according to the properties of the metal scraps such as whether the oil content is large or small, and the processing efficiency can be improved. Further, the metal scrap containing the foreign matter can be handled as the second raw material to facilitate the operational management.
That is, the foreign matter is often present in the form of a hard lump, and therefore, when compression molding is performed with the foreign matter contained therein, the foreign matter is caught in the second molding means and the second molding means is damaged. Or, there is a possibility that a trouble such as operation stop may occur, but since the foreign matter is removed by the first foreign matter removing means, there is no possibility of causing the trouble and the operational management can be facilitated. In addition, after the first raw material and the second raw material are processed in different steps, compression molding is performed so that the properties such as the oil content of each of the first and second raw materials are almost the same. You can Therefore, the processing operation such as heating by the vacuum deoiling means can be similarly performed regardless of whether the molded product is made of the first or second raw material. Further, under reduced pressure, since the density in the heating chamber becomes small, the evaporation rate of oil and water is high, and the time required to remove the oil and water by the vacuum deoiling means can be short,
The overall operation cycle time can be shortened. Furthermore, since the molded product is heated, the vaporization of the oil and water can be promoted. Further, when the metal scrap is compression molded into a molded product to increase the bulk specific gravity, as compared with the case where the metal scrap in the non-compression molded state is charged into the heating chamber,
It becomes possible to charge a large amount of metal waste for each operation cycle of the vacuum deoiling means. Moreover, since compression molding is performed, when a plurality of molded products are accommodated in the bucket and charged into the heating chamber, the ventilation of the atmospheric gas between the molded products in the bucket is improved, and the atmospheric gas of each molded product is improved. It is possible to obtain a wide contact surface with and to uniformly heat all the moldings in the bucket, and improve the processing capacity of vacuum deoiling. In addition, compression molding of metal scraps improves the heat transfer of each molded product, so it is possible to quickly raise the temperature inside each molded product, and to reduce the viscosity of the oil inside the molded product in a short time. It can be lowered, dropped and vaporized. Further, the vaporized steam of oil and water in the heating chamber is guided to the oil / water recovery means and cooled to recover the oil and water. As a result, the oil content contained in the metal scrap is recovered from the metal scrap. Therefore, the recovered oil can be reused, for example, as fuel for combustion of the vacuum deoiling means, and resource saving can be achieved.

According to the second aspect of the present invention, between the centrifugal separation means and the first molding means, air is blown to the metal scrap from which a part of the oil and water has been removed by the centrifugal separation means to remove foreign matters. A second foreign matter removing means is provided. According to the present invention, the metal scrap from which a part of oil and water has been removed by the centrifugal separation unit is blown to remove foreign matter. As a result, the metal scrap containing a large amount of oil and containing foreign matter such as abrasive powder is handled as the first raw material, and the foreign matter is removed after mechanically removing a part of the oil and water by the centrifugal separation means. By forming the molded product, the load on the subsequent vacuum deoiling means can be reduced, the processing efficiency can be improved, and the operational management can be facilitated. That is, when the amount of oil contained in the metal scrap is large, the amount of oil that can be removed in a short time by the centrifugal separation means is large, and at a low cost, as compared with the case where the oil content is removed only by the vacuum deoiling means, The processing efficiency can be improved in terms of time and cost. Moreover, the foreign matter is often present in the form of a hard lump, and therefore, when compression molding is performed in a state in which the foreign matter is contained, the foreign matter is caught in the first molding means and the first molding means is damaged, or Although there is a possibility that a trouble such as operation stop may occur, since the foreign matter is removed by the second foreign matter removing means, there is no possibility of causing the trouble and the operational management can be facilitated.

According to a third aspect of the present invention, the vacuum deoiling means is provided with deoiling furnaces each provided with the heating chamber, and the deoiling furnaces are provided side by side on one side of the vacuum deoiling means. The first and second molding means are arranged in parallel in a second direction perpendicular to the first direction, and the molding means is carried out between the molding means and the vacuum deoiling means. A breathable bucket into which a molded product is loaded is mounted, and a plurality of molded product carts that are movable in the second direction are provided in which the respective molding means are arranged in parallel, and the heating chamber of each deoiling furnace faces. It is characterized in that a bucket carrying means capable of loading the loaded bucket into the heating chamber and discharging the bucket from the heating chamber is provided at the front so as to be movable in the first direction. According to the invention, the second direction perpendicular to the first direction in which the deoiling furnaces are arranged in parallel is provided on one side of the vacuum deoiling means in which the deoiling furnaces each including the heating chamber are arranged in parallel. The first and second molding means are arranged side by side.
A plurality of molded product carts that are movable in the second direction are provided between each molding device and the vacuum deoiling device, and a breathable bucket on which the molded product is loaded is mounted. In front of each deoiling furnace, a bucket carrying means is provided so as to be movable in the first direction, and the bucket into which the molded product is loaded on the molded product carriage is
It can be charged into and discharged from the heating chamber. By this, the molded product formed by each molding means is directly charged into each deoiling furnace having a heating chamber from each molding means, and is thrown into a bucket mounted on the molded product truck, The bucket is loaded into the heating chamber by the bucket carrying means. Therefore, in order to prevent each molding device and each deoiling furnace from being affected by the mutual operation cycle, the molded product is put into a bucket and temporarily stored to absorb the difference between the mutual operation cycles. Then, it is possible to drive smoothly. Further, since the molded products are loaded into each deoiling furnace while being housed in the bucket, so-called batch processing can be performed on a plurality of molded products as a group, and the quantitative management of the molded products is easy. In addition, it is possible to save the labor of loading the molded product into the heating chamber and discharging the molded product from the heating chamber. Moreover, each molded product can be heated uniformly by making the laminated thickness of the molded product uniform in the heating chamber. Furthermore, the bucket has air permeability, and the atmospheric gas in the heating chamber can be easily introduced from the outside of the bucket into the inside of the bucket, which can help uniform heating.

According to a fourth aspect of the present invention, a first raw material hopper into which the first raw material is charged and a second raw material hopper into which the second raw material is charged are provided, and the first raw material hopper and the centrifugal separation means are provided. Between the centrifugal separation means and the first molding means, a first conveying means for conveying the first raw material introduced into the first raw material hopper and supplying it to the centrifugal separating means is provided between the centrifugal separating means and the first molding means. A second transporting unit that transports the metal scrap from which a part of the oil and water has been removed by the separating unit and supplies it to the first shaping unit is provided, and between the second raw material hopper and the second shaping unit. , The metal scraps, which have been charged into the second raw material hopper and from which the foreign matter has been removed by the first foreign matter removing means, are conveyed to
It is characterized in that a third conveying means for supplying the molding means is provided. According to the invention, the first
Between the raw material hopper and the centrifuging means, a first conveying means for conveying the first raw material is provided. As a result, the carried-in first raw material is not directly supplied to the centrifugal separation means, but is put into the first raw material hopper and is supplied from the first raw material hopper to the centrifugal separation means by the first conveying means. Therefore,
By temporarily storing the first raw material in the first raw material hopper so that the loading of the first raw material and the operation of the centrifugal separation means are not mutually affected, the loading cycle of the first raw material and the centrifugal separation are performed. The difference from the operation cycle of the means can be absorbed to smoothly carry in the first raw material and operate the centrifugal separation means. Further, between the centrifuge means and the first molding means, there is provided a second carrying means for carrying the metal scrap from which a part of the oil and water has been removed from the first raw material. As a result, the metal scrap from which the oil and water have been partially removed by the centrifugal separation means is not directly supplied from the centrifugal separation means to the first molding means, but is gradually supplied by the second transfer means. Therefore, the operation of the centrifuge means and the operation of the first molding means are
By interposing the second transfer means so as not to affect each other, the difference between the operation cycles of the centrifugal separation means and the first molding means is absorbed, and the centrifugal separation means and the first molding means are smoothly operated. It can be carried out. Further, between the second raw material hopper into which the second raw material is charged and the second molding means, there is provided a third conveying means for conveying the metal scrap from which the foreign matter has been removed by the first foreign matter removing means. As a result, the second raw material carried in is not directly supplied to the second molding means via the first foreign matter removing means, but is fed into the second raw material hopper and is passed from the second raw material hopper via the first foreign matter removing means. And is supplied to the second molding means by the third conveying means. Therefore, the second raw material is temporarily stored in the second raw material hopper so that the carry-in of the second raw material, the operation of the first foreign matter removing unit, and the operation of the second molding unit are not mutually affected, Further, by passing through the third conveying means, the difference between the carry-in cycle of the second raw material, the operating cycle of the foreign matter removing means, and the operating cycle of the second molding means is absorbed to carry in the second raw material and the first foreign matter. The operation of the removing unit and the operation of the second molding unit can be smoothly performed.

According to a fifth aspect of the present invention, there is provided a discharging means for tilting the bucket containing the molded product from which the oil content and water have been removed by the vacuum deoiling means, and discharging the molded product to the transportation vehicle. It is characterized by According to the invention, the molded product from which the oil content and the moisture have been removed by the vacuum deoiling means is delivered to the transportation vehicle by the delivery means. As a result, the molded product is dispensed from the vacuum deoiling means to the transporting vehicle without being dispensed directly to the transporting vehicle via the dispensing means. Therefore, in order to prevent the operation of the vacuum deoiling means and the carry-out of the molded article from mutually affecting each other, the difference between the operation cycle of the vacuum deoiling means and the carry-out cycle of the molded article is absorbed by way of the discharging means, It is possible to smoothly operate the vacuum deoiling means and carry out the molded product.

According to a sixth aspect of the present invention, a first raw material composed of fluffy metal scraps containing oil and water is centrifuged to remove a part of the oil and water from the first raw material. The second raw material composed of fluffy metal scraps containing oil and water and powdery foreign matter is vibrated to remove the foreign matter from the second raw material, and metal scraps from which a part of the oil and water is removed and The metal scrap from which foreign substances have been removed is compression molded to form a molded product, which is placed in a heating chamber and heated under reduced pressure to remove oil and water remaining in the molded product under reduced pressure. It is a method for removing oil and water in metal scraps, which is characterized in that the vaporized steam of oil and water from the heating chamber is cooled outside the furnace and recovered by oil removal. According to the present invention, metal scraps obtained by centrifuging a part of the oil and water from the first raw material consisting of metal scraps containing oil and water are compression-molded into a molded product. Further, the metal scrap from which the foreign matter is removed from the second raw material made of the metal scrap containing the oil content, the water content, and the particulate foreign matter is compression-molded into a molded product. Each compression molded product is heated under reduced pressure in a heating chamber to remove residual oil and water. Thus, the metal scrap containing a large amount of oil is treated as the first raw material, and centrifugally separated to mechanically remove a part of the oil and water to form a molded product. The burden can be reduced and the processing efficiency can be improved. In other words, when the amount of oil contained in metal scraps is large,
The amount of oil that can be removed in a short time by centrifuging is large and the cost is low, and it is possible to improve the processing efficiency in terms of time and economy as compared with the case of removing the oil only by vacuum deoiling. You can Further, it is possible to handle the metal scrap containing a small amount of oil as the second raw material and improve the processing efficiency. In other words, when the amount of oil contained in metal scraps is small, the amount of oil that can be removed by centrifugation is small, and the amount of oil that must be removed by vacuum deoiling treatment is almost There is no difference. On the contrary, the centrifugal separation consumes wasteful time and power, and reduces the processing efficiency in terms of time and cost. Therefore, the processing efficiency can be improved by forming the molded product without centrifugation. In this way, the treatment efficiency can be improved by treating the metal scraps in different treatment steps according to the properties of the metal scraps, such as whether the contained oil content is large or small. Further, it is possible to handle the metal scrap containing the foreign matter as the second raw material and facilitate the operational management. That is, the foreign matter often exists in the form of a hard lump, and therefore, when compression molding is performed in a state where the foreign matter is contained, there is a possibility that a device for compression molding may be damaged or operation may be stopped. But
Since the foreign matter is removed, there is no possibility that the above-mentioned trouble will occur, and the operational management can be facilitated. In addition, after the first raw material and the second raw material are processed in different steps, compression molding is performed so that the properties such as the oil content of each of the first and second raw materials are almost the same. You can Therefore, the processing operation such as heating by the vacuum deoiling means can be similarly performed regardless of whether the molded product is made of the first or second raw material. Further, since the molded product is heated under reduced pressure, it is possible to reduce the density in the heating chamber, increase the vaporization rate of oil and water, and remove the oil and water by vacuum deoiling treatment. The overall operating cycle time can be shortened. Furthermore, since the molded product can be heated, the evaporation of oil and water can be promoted. Furthermore, when the metal scrap is made into a molded product to increase the bulk specific gravity, the metal scrap is deoiled without compression molding. Compared with the case of charging in the furnace, a large amount of metal scrap can be charged in each operation cycle of the deoiling furnace.
Moreover, since compression molding is performed, when a plurality of molded products are accommodated in the bucket and charged into the heating chamber, the ventilation of the atmospheric gas between the molded products in the bucket is improved, and the atmospheric gas of each molded product is improved. You can get a wide contact surface with
All the moldings in the bucket are heated uniformly to improve the processing capacity of vacuum deoiling. In addition, compression molding of metal scraps improves the heat transfer of each molded product, so it is possible to quickly raise the temperature inside each molded product, and to reduce the viscosity of the oil inside the molded product in a short time. It can be lowered, dropped and vaporized. Further, the exhaust gas containing vaporized steam of oil and water in the heating chamber is cooled outside the furnace and collected. As a result, the oil content contained in the metal scrap is separated and recovered. Therefore, the recovered oil is
For example, it can be used as a combustion fuel in vacuum deoiling processing, and resource saving can be achieved.

The present invention according to claim 7 is characterized in that the first raw material is blown to metal scrap from which a part of oil and water has been removed to remove foreign matters, and then compression molded. According to the present invention, air is blown to the metal scraps that have been centrifuged to remove some of the oil and water, and foreign matter is removed, followed by compression molding. As a result, the amount of oil contained is large,
In addition, the metal scrap containing foreign matter such as abrasive powder is handled as the first raw material, and after mechanically removing a part of the oil and water by centrifugation, the foreign matter is removed to form a molded product, and the subsequent heating is performed. The processing load can be reduced,
It is possible to improve processing efficiency and facilitate operational management. In other words, when the amount of oil contained in metal scraps is large, the amount of oil that can be removed in a short time by centrifugation is large, and compared with the case where oil is removed only by heat treatment, processing is performed from a time and economical standpoint. The efficiency can be improved. Moreover, foreign matter is often present in the form of hard lumps, so if compression molding is performed with this foreign matter contained, problems such as damage to the means for foreign matter compression molding or suspension of operation will occur. Although there is a possibility that the foreign matter will be removed,
There is no risk of the above-mentioned problems, and operational management can be facilitated.

According to an eighth aspect of the present invention, the plurality of molded products formed by the compression molding are housed in a bucket having air permeability, the bucket is loaded into the heating chamber, and the pressure is reduced under reduced pressure. It is characterized by heating. According to the present invention, since the molded product is loaded into the heating chamber while being housed in the bucket, so-called batch processing can be performed on a plurality of molded products as a group, and quantitative control of the molded product can be performed. In addition to being easy, it is possible to omit the labor of loading the molded product into the heating chamber and discharging the molded product from the heating chamber. Moreover, each molded product can be heated uniformly by making the laminated thickness of the molded product uniform in the heating chamber. Further, the bucket is breathable, and the atmospheric gas in the heating chamber can be easily introduced from the outside of the bucket into the inside of the bucket, which can help uniform heating.

According to a ninth aspect of the present invention, after the bucket is charged into the heating chamber, the inside of the heating chamber is replaced with an inert gas, and the inert gas is heated to convect the molded product in the bucket. The method is characterized by heating under reduced pressure after convection heating. According to the present invention, since the air in the heating chamber is expelled and is heated after being replaced with an inert gas, there is no oxygen in the heating chamber and there is a risk that the oil content in the molded product will explode and burn. There is no. In addition, deterioration of oil quality due to oxidation of oil content can be prevented. Furthermore, since the inert gas in the heating chamber is convected, the inert gas heated to a high temperature can be brought into contact with the molded product, and the molded product can be heated in a short time.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view schematically showing a deoiling plant 2 equipped with a deoiling facility 1 according to an embodiment of the present invention. The deoiling equipment 1, which is equipment for removing oil and water of metal scraps, basically includes a centrifuge 3, a first molding device 4, a first foreign matter removing means 5, a second molding device 6, It comprises a vacuum deoiling means 7 and an oil / water recovery means 8.

The centrifuge 3, which is a centrifugal separating means, centrifuges a fluff-like, in other words, fluffy metal scrap containing oil and water to centrifuge the first raw material to separate the oil from the first raw material. And remove some of the water.
The first molding device 4, which is the first molding means, compression-molds the metal scrap from which part of the oil and water has been removed by the centrifuge 3 to form a solid molded product. The first foreign matter removing means 5 is mainly composed of fluff-like metal scraps containing oil and water, and powdery foreign matter such as abrasive powder.
The raw material is vibrated to remove foreign matter such as the abrasive powder from the second raw material. The second molding device 6, which is the second molding means, removes the metal scrap from which the foreign matter is removed by the first foreign matter removing means 5.
It is compression molded to form a solid molded product.

In the vacuum deoiling means 7, a first deoiling furnace 9 and a second deoiling furnace 10 each having a heating chamber are installed in parallel.
This vacuum deoiling means 7 includes first and second molding means 4, 6
The molded products formed by the method are individually inserted into the airtight heating chambers of the deoiling furnaces 9 and 10 and heated under reduced pressure to remove oil and water remaining in the molded products. The oil / water recovery means 8 is guided by vaporized steam of oil and water in the heating chambers of the deoiling furnaces 9 and 10, and uses this vapor.
Cool outside 0 and collect the oil and water.

In the deoiling equipment 1, large and small first receiving hopper 11 and second receiving hopper 12 which are first raw material hoppers into which the first raw material is charged, and second secondary hoppers into which the second raw material is charged.
A third receiving hopper 13, which is a raw material hopper, is provided.
The first and second receiving hoppers 11 and 12 are arranged side by side, and
The first raw material charged in the first and second receiving hoppers 11 and 12 is conveyed between the second receiving hoppers 11 and 12 and the centrifuge 3, and is supplied to the centrifugal separator 3.
A first transfer device 14 and a second transfer device 1 which are transfer means.
5 are provided respectively. Between the centrifuge 3 and the first molding device 3, there is provided a second conveying means 16 which conveys the metal scrap from which the oil and water have been removed by the centrifuge 3 and supplies the metal scrap to the first molding device 3. To be Second transport means 16
Includes a first relay hopper 17 provided between the centrifuge 3 and the first molding device 4, and a first relay hopper 17 for removing metal waste from the centrifuge 3.
It has a third transfer device 18 for transferring to the relay hopper 17, and a fourth transfer device 19 for transferring metal scraps from the first relay hopper 17 to the first molding device 4.

Between the third receiving hopper 13 and the second molding device 6, the metal scraps which have been put into the third receiving hopper 13 and from which the foreign matters have been removed by the first foreign matter removing means 5 are conveyed to carry out the above-mentioned first step. A third transfer means 20 for supplying the second molding device 6 is provided. The third transport means 20 is provided with a second relay hopper 21 provided adjacent to the first relay hopper 17, and a first metal scrap.
Fifth conveying from foreign matter removing means 5 to second relay hopper 21
It has a carrying device 22 and a sixth carrying device 23 for carrying from the second relay hopper 21 to the second molding device 6. Also, the third
Adjacent to the receiving hopper 13, a foreign matter carrying means 36 having a first foreign matter carrying apparatus 34 and a second foreign matter carrying apparatus 35 is provided, and the foreign matter removed by the first foreign matter removing means 5 is carried to the foreign matter storage 85. .

On one side of the vacuum deoiling means 7, a first direction in which the deoiling furnaces 9 and 10 are arranged in parallel, that is, a second direction perpendicular to the horizontal direction in FIG. 1, that is, in FIG. The first and second molding devices 4 and 6 are arranged side by side in the vertical direction.
Between the molding devices 4, 6 and the vacuum deoiling means 7, a plurality of molded products on which a bucket 24 having air permeability is placed, into which the molded products carried out from the molding devices 4, 6 are loaded. Trolley 2
5 are provided. On the floor of the deoiling factory 2, a pair of rails 2
6a and 26b extend in the second direction and are laid, and each molded product truck 25 is provided so as to be movable in the second direction by being guided by each rail 26a and 26b.

In front of the heating chambers of the deoiling furnaces 9 and 10, there is provided a bucket carrying means 27 capable of loading the loaded buckets 24 into the heating chambers and discharging the buckets 24 from the heating chambers. A pair of rails 28 are provided on the floor of the deoiling plant 2.
a and 28b extend in the first direction and are laid, and the bucket carrying means 27 is provided so as to be movable in the first direction by being guided by the rails 28a and 28b. A receiving temporary placement table 29 on which the bucket 24 is to be placed is provided adjacent to the first deoiling furnace 9 on the side of the first deoiling furnace 9 close to each molded product truck 25. In addition, on the side of the second deoiling furnace 10 opposite to each molded product truck 25, the bucket 2 is provided adjacent to the second deoiling furnace 10.
A temporary dispensing stand 30 on which the number 4 is to be placed is provided. The bucket transport means 27 can receive and load the bucket 24 placed on the receiving temporary placing table 29, and can also pay out the loaded bucket 24 to the payout temporary placing table 30 to be placed.

Further, a plurality of molded product storage areas 31 are provided adjacent to the temporary disposition table 30, and a dispensing means 32 is provided adjacent to the molded product storage areas 31. This payout means 3
2 can tilt the bucket 24 accommodating the molded product deoiled and dehydrated in the vacuum deoiling means 7 and deliver the molded product to the carrying vehicle 33 for carrying out. Also,
A raw material storage 37 is provided adjacent to the first and second receiving hoppers 11 and 12, and a transportation vehicle 38 for carrying in the first raw material is provided.
The first raw material carried in can be temporarily placed.

Further, an overhead traveling crane (hereinafter sometimes abbreviated as "crane") is provided above the deoiling plant 2.
59 is provided. The crane 59 is bridged between runways (not shown) provided on both side walls 2a, 2b of the oil removal plant 2, and has a girder 40 traveling along the runway and a trolley 41 traversing along the girder 40. . A suspending tool for suspending or grasping a load is suspended on the trolley 41, and can be wound up and down by a winding drive device (not shown). Such a crane 59 can carry out cargo, that is, move goods by traveling, traversing, hoisting and lowering.

FIG. 2 is a system diagram showing the processing steps of the deoiling equipment 1. Referring also to FIG. 1, the first raw material is stored in a transport container 42, mounted on a transport vehicle 38 for transporting the first raw material, and loaded into the deoiling factory 2.
The loaded first raw material is selectively loaded into the first and second receiving hoppers 11 and 12 by the crane 59 directly from the transport vehicle 38 or after being temporarily placed on the raw material storage 37. . First and second receiving hoppers 11,1
The first raw material charged in No. 2 is used as the first and second transfer devices 1.
It is conveyed by 4, 4 and is supplied to the centrifugal separator 3 to remove a part of oil and water. The metal scrap from which a part of oil and water has been removed is conveyed by the second conveying means 16 and is supplied to the first molding device 4 to be compression-molded into a molded product, which is put into the bucket 24 on the molded product carriage 25. To be done.

The second raw material is directly mounted on the transportation vehicle 43 for carrying in the second raw material, carried into the deoiling factory 2, and directly fed from the transportation vehicle 43 to the third receiving hopper 13.
From the second raw material charged into the third receiving hopper 13, foreign matter such as abrasive powder is removed by the first foreign matter removing means 5. The foreign matter removed by the first foreign matter removing means 5 is transported to the foreign matter storage area 85 by the foreign matter transporting means 36. The metal scrap from which the foreign matter has been removed is transported by the third transport means 20 and supplied to the second molding device 6, where it is compression molded into a molded product, and is thrown into the bucket 24 on the molded product carriage 25.

The bucket 24, into which the molded product carried out from each of the molding devices 4 and 6 is loaded, is moved to and placed on the temporary receiving stand 29 by the crane 59. The bucket 24 placed on the temporary receiving stand 29 is selectively inserted into one of the deoiling furnaces 9 and 10 by the bucket carrying means 27, and the oil content remaining in the molded product in the bucket 24 is reduced. And moisture is removed. When the oil and water are removed in the deoiling furnaces 9 and 10, the buckets 24 are discharged from the deoiling furnaces 9 and 10 by the bucket transfer means 27 and placed on the temporary dispensing stand 30.

The bucket 24 placed on the temporary disposing table 30
By the crane 59 directly or in the molding storage area 3
After being temporarily placed on No. 1, it is moved to the payout means 32. By tilting the bucket 24 by the payout means 32, the molded product is mounted on a carrying vehicle 33 for carrying out and is carried to a subsequent steelmaking factory or the like and used as a main raw material for obtaining a molten metal. Therefore, resource saving is achieved.

Further, the deoiling equipment 1 is provided with a sedimentation storage tank 44 adjacent to the centrifuge 3, and the oil and water removed by the centrifuge 3 and the molding devices 4 and 6 are sedimented and stored. The oil and water are guided to the tank 44, and the oil and water are separated by utilizing the difference in specific gravity in the settling storage tank, and the foreign matters existing in the oil and water as powdery particles are separated and separated. It The oil thus recovered is reused in other equipment or the like according to its properties, thereby saving resources. The oil and water removed in the deoiling furnaces 9 and 10 are separated into oil and water by the oil / water recovery means 8, and the recovered oil is burned in the reduced pressure deoiling means 7 to serve as a heat source for heating. Used. The collected water is cleaned, for example, in a state in which it can be discharged, and then discarded. In addition, the same processing is performed on foreign substances and they are discarded.

As described above, the deoiling equipment 1 has two processing systems, that is, a processing system for the first raw material and a processing system for the second raw material. The processing system is selected accordingly. For example, this deoiling factory 2
Rough Polishing and Finishing Polishing (F
Inishing Polishing), about 45-50
Metal scraps containing oil by weight are treated as the first raw material. The first raw material is in a good management state and does not contain water. By handling the metal scrap containing a large amount of oil as the first raw material in this way, the centrifugal separator 3 removes the oil to make the content about 10% by weight, and the compression molding is performed by the first molding device 4. Further, deoiling, that is, the oil content is removed, and a molded product having an oil content of about 7% by weight is formed (hereinafter, similarly, “oil content removal”).
May be referred to as "deoiling"). This molded product is heat-treated in the first deoiling furnace 9 and further deoiled until the content becomes about 1% by weight.

By deoiling until the oil content becomes about 1% by weight, abnormal combustion such as explosive combustion occurs when the material is heated as a material for obtaining a molten metal in a steelmaking plant as described above. It can be prevented from happening. Further, although the metal scraps as the first raw material exemplified here do not contain water, even if the metal scraps contain water, oil is similarly removed, and
Water and oil are also removed at the same time as oil, and finally, water is removed until the content of water is about 1% by weight, that is, water is removed (hereinafter, similarly, “removal of water”).
May be referred to as "dehydration"). By dehydrating until the content of water becomes about 1% by weight, it is possible to prevent steam explosion from occurring when used as a material for obtaining a molten metal in a steelmaking plant and heating as described above. it can.

As described above, the metal scrap containing a large amount of oil is treated as the first raw material, and the centrifugal separator 3 mechanically removes a part of the oil to form a molded product.
It is possible to reduce the load on the subsequent vacuum deoiling means 7,
The processing efficiency can be improved. That is, when the amount of oil contained in the metal scraps is large, the amount of oil that can be removed in a short time by the centrifugal separator 3 is large, so the time is shortened compared to the case where the oil is removed only by the vacuum deoiling means 7. In addition, the processing efficiency can be improved in terms of time and cost because the cost can be reduced.

HiNi containing a large amount of buffing powder and Ni (nickel) containing about 10 to 18% by weight of oil.
Buffed powder and purchased metal scraps such as centerless powder containing about 4% by weight oil and about 10% by weight water,
In addition, the stored metal scraps containing about 5 to 18% by weight of oil content and about 0 to 10% of water generated at other steelworks, and about 5 to 18% by weight of oil content are deposited outdoors for a while. The scrap metal and the like that have been removed are handled as the second raw material. Thus, the metal scrap containing a small amount of oil and water is treated as the second raw material, and is deoiled while being compression-molded by the second molding device 6, so that the oil content is about 7% by weight.
Molded articles of less than or equal degree are formed. This molded product is heat-treated in the second deoiling furnace 10 and further deoiled until the content becomes about 1% by weight.

Similar to the first raw material, by deoiling until the oil content becomes about 1% by weight, when used as a material for obtaining a molten metal in a steelmaking plant as described above, when heating, It is possible to prevent abnormal combustion such as explosion. Similarly, the water content is removed at the same time as the oil content, and finally, the water content is dehydrated until the water content becomes about 1% by weight. By dehydrating until the content of water becomes about 1% by weight, it is possible to prevent steam explosion from occurring when used as a material for obtaining a molten metal in a steelmaking plant and heating as described above. it can. In this embodiment, the first raw material and the second raw material
With the raw material, each deoiling furnace 9, due to the composition of the raw material,
The first raw material is deoiled in the first deoiling furnace 9 and the second raw material is deoiled in the second deoiling furnace 10 because the treatment cycle in 10 is different.

In this way, the metal scrap containing a small amount of oil can be treated as the second raw material to improve the processing efficiency. That is, it is extremely difficult to reduce the content to about 10% by weight or less by deoiling with the centrifuge 3, and the oil that can be removed with the centrifuge 3 when the amount of oil contained in the metal scrap is small. Since the amount is small, the amount of oil that must be removed by the vacuum deoiling means 7 is
There is almost no difference whether or not the treatment is performed by the centrifuge 3. On the contrary, the processing by the centrifuge 3 consumes wasteful time and reduces the processing efficiency in terms of time and economy. For this reason,
By forming the molded product without using the centrifugal separator 3, the processing efficiency can be improved. As described above, the deoiling equipment 1 capable of processing different processing steps can process the metal scraps in different processing steps according to the properties of the metal scraps such as whether the amount of contained oil is large or small, and the processing efficiency is improved. Can be improved.

The metal scraps exemplified as the second raw material may contain abrasive powder and may contain, for example, fine stones or nails because of poor control. The metal scrap containing foreign matter such as abrasive powder can be handled as the second raw material to facilitate operational management. In other words, foreign matter such as abrasive powder is often present in the form of hard lumps, and fine stones and nails are also hard solid matter. Therefore, when compression molding is performed with the foreign matter contained therein, the foreign matter is generated in the second molding device. There is a risk that the second molding device 6 will be damaged by being bitten by 6 or cause a malfunction such as an operation stop. However, since the foreign matter is removed by the first foreign matter removing means 5, It is possible to facilitate the operational management without the possibility of occurrence of

In addition, after the first raw material and the second raw material are processed in different steps, compression molding is performed, so that the properties such as the oil content of each of the first and second raw materials are almost the same. Can be Therefore, the processing operation such as heating by the vacuum deoiling means can be similarly performed regardless of whether the molded product is made of the first or second raw material.

Further, under reduced pressure, since the density in the heating chamber becomes small, the evaporation rate of oil and water is high, and the time required for removing oil and water by the vacuum deoiling means is short, and the whole The operating cycle time of can be shortened. Furthermore, since the molded product is heated,
Vaporization of the oil and water can be promoted.

Further, the metal scrap is formed into a molded product to increase the bulk specific gravity, and the metal scrap is removed from each of the deoiling furnaces 9 and 1 without compression molding.
It is possible to charge a large amount of metal scrap for each operation cycle of the vacuum deoiling means 7, as compared with the case of charging into the heating chamber of 0. Moreover, since compression molding is performed, when a plurality of molded products are stored in a bucket and charged into the heating chamber, the ventilation of atmospheric gas between the molded products in the bucket is improved, and the atmospheric gas of each molded product is improved. It is possible to obtain a wide contact surface with, and evenly heat all moldings in the bucket,
The processing capacity of vacuum deoiling is improved. In addition, compression molding of metal scraps improves the heat transfer of each molded product, so it is possible to quickly raise the temperature inside each molded product, and to reduce the viscosity of the oil inside the molded product in a short time. It can be lowered, dropped and vaporized.

Further, the vaporized steam of oil and water in the heating chamber is guided to the oil / water recovery means 8 and cooled to recover the oil and water. As a result, the oil content contained in the metal scrap is recovered. Therefore, the recovered oil can be used as, for example, the combustion fuel of the vacuum deoiling means 7, and resource saving can be achieved.

Referring again to FIG. 1, screw feeders 45 and 46 are provided below the first and second receiving hoppers 11 and 12, respectively, and the first and second receiving hoppers 11 and 12 are provided. The first raw material charged in is discharged little by little. Also, the first and second receiving hoppers 1
Impact generators 47 and 48 called maghammers and the like are provided at 1 and 12, respectively. The first raw material maintains a constant shape as a whole by the mutual engagement and friction of the metal scraps, forms a bridge between the inner walls of the first and second receiving hoppers 11 and 12, so to speak, and does not fall downward. The first raw material may not be delivered by the feeders 45 and 46. In such a state, the impact generators 47, 48 impact the first and second receiving hoppers 11, 12 to cause them to vibrate, thereby breaking the bridge and dropping the first raw material downward. You can

The first and second conveying devices 14 and 15 are realized by, for example, belt conveyors, and are arranged so as to be upward from the starting end portions on the first and second receiving hopper sides toward the terminal end portions on the centrifuge 3 side. Each is arranged. The conveyor belts of the first and second conveyors 14 and 15 have locking portions having both widthwise end portions rising so as to have a substantially U-shaped cross section and rising at intervals in the longitudinal direction. is doing. As a result, the first raw material can be smoothly transported to the downstream side in the transport direction, that is, from the start end portion to the end portion. The conveyor belts of the first and second conveyors 14 and 15 are housed in the housing to prevent foreign matter from mixing into the first raw material and to prevent dust and the like from scattering around. There is.

The starting end portions of the first and second conveying devices 14 and 15 are provided below the discharge ports of the screw feeders 45 and 46 provided in the lower portions of the first and second receiving hoppers 11 and 12, respectively. Of the centrifuge, and the respective terminal portions are respectively disposed above the receiving chute (shown in FIG. 3) 49 of the centrifuge and facing the receiving chute 49. By the first and second transfer devices 14 and 15, the first and second receiving hoppers 1
The 1st raw material sent out from the lower part of 1, 12 can be supplied to the centrifugal separator 3 from the upper part.

As described above, the first raw material carried in is not directly supplied to the centrifuge 3 but is put into the first and second receiving hoppers 11 and 12, and the first and second receiving hoppers 1 and 2 are fed.
1, 12 are supplied to the centrifuge 3 by the first and second transfer devices 14, 15. Therefore, by temporarily storing the first raw material in the first and second receiving hoppers 11 and 12, the difference between the loading cycle of the first raw material and the operation cycle of the centrifuge 3 is absorbed, and the first raw material is absorbed. It is possible to smoothly carry in the raw materials and operate the centrifugal separator 3.

Further, as described above, since the raw material storage 37 is provided, when the first and second receiving hoppers 11 and 12 are filled with the first raw material, the transport container 42 containing the first raw material is provided. Can be temporarily placed in the raw material storage 37 to further facilitate the loading of the first raw material.
Further, by providing the first and second receiving hoppers 11 and 12 as the first raw material hopper, when a large amount of the first raw material is carried in, the first and second receiving hoppers 11 and 1 are provided.
2 and the first and second transfer devices 14 and 15 are operated together for smooth processing, and when a small amount of the first raw material is loaded, either one of the first and second receiving hoppers 11 and 12 and the corresponding First and second transport device 1
It is possible to save energy by operating either one of 4 and 15.

FIG. 3 is a side view schematically showing the second conveying means 16. The centrifuge 3 puts the first raw material into a bucket having a plurality of pores, and rotates the bucket at a high speed to fly a part of oil and water from the pores to the outside of the bucket to remove metal scraps. Can be removed. A discharge chute 50 is provided in the lower portion of the centrifuge 3, and metal scraps from which a part of oil and water has been removed from the first raw material are guided downward. Second transport means 16
The third transfer device 18 is realized by a belt conveyor, and is arranged at a steep slope from the start end part on the centrifuge 3 side toward the end part on the first relay hopper 17 side, and the third transfer device 18 The space occupied by the device 18 is reduced.

The transport belt of the third transport device 18 has locking portions whose both ends in the width direction are raised so as to have a substantially U-shaped cross section, and which are raised at intervals in the longitudinal direction. ing. Thereby, even if the third transport device 18 is arranged at a steep slope, the first raw material can be smoothly transported to the downstream side in the transport direction, that is, from the start end portion to the end portion.
Further, the transport belt of the third transport device 18 is housed in the housing to prevent foreign matter from mixing into the metal scraps from which the oil and water have been partially removed by the centrifuge 3 and to the surrounding area. Prevents dust from scattering.

The starting end portion of such a third transfer device 18 is
The discharge chute 50 provided in the lower part of the centrifuge 3 is disposed below the discharge port so as to face the discharge port, and the terminal end portion is disposed on the first relay hopper 17 and the first relay hopper 1.
It is placed facing 7. By the third transport device 18, metal scraps obtained by removing a part of oil and water from the first raw material sent from the lower part of the centrifugal separator 3 can be supplied to the first relay hopper 17 from above.

A screw feeder 51 is provided below the first relay hopper 17 of the second conveying means 16.
The metal scraps from which the oil content and a part of the water content are removed from the first raw material input to the first relay hopper 17 by the third transfer device 18 are sent out little by little. Further, the first relay hopper 1 arranged between the centrifuge 3 and the first molding device 4
A second foreign matter removing means 52 is provided on the upper portion of 7. The second foreign matter removing means 52 is realized by, for example, a blower, and the third transfer device 18 causes the first relay hopper 1 to operate.
By blowing air to the metal scraps conveyed on the top 7, and blowing away the fluffy metal scraps with the wind force, it is possible to remove the abrasive powder present in the form of lumps and foreign substances such as nails and fine stones.

By providing the second foreign matter removing means 52, the metal scrap containing a large amount of oil as described above and containing foreign matter such as abrasive powder is handled as the first raw material, and the centrifugal separator 3 is used. By mechanically removing a part of oil and water by means of the above method to remove foreign matter to form a molded product, the load on the subsequent vacuum deoiling means 7 can be reduced and the processing efficiency can be improved. It is also possible to facilitate operation management. That is,
When the metal scrap contains a large amount of oil, as described above, it is possible to mechanically remove a part of the oil and water to improve the processing efficiency in terms of time and economy. Moreover, since foreign matter such as abrasive powder is often present in the form of hard lumps, if the foreign matter is compressed and molded, the foreign matter is caught in the first molding machine 4 and the first molding machine 4 is Although there is a possibility that a defect such as damage or suspension of operation may occur, since the foreign matter is removed by the second foreign matter removing means 52, the problem does not occur and the operational management can be facilitated. You can

The fourth transfer device 19 of the second transfer means 16 is
Realized by a belt conveyor, the first relay hopper 17
The fourth conveying device 19 is arranged at a steep slope so as to be upward from the starting end on the side toward the terminating end on the side of the first molding device 4.
Occupies less space. The transport belt of the fourth transport device 19 has locking portions whose both ends in the width direction stand up and stand up at intervals in the longitudinal direction so that the cross-sectional shape is substantially U-shaped. As a result, even if the fourth transfer device 19 is arranged at a steep slope, the centrifugal separator 3 removes part of the oil and water, and the second foreign matter removing means 52 removes the foreign matter. It can be smoothly transported to the downstream side, that is, from the starting end portion to the terminating end portion. The transport belt of the fourth transport device 19 is housed in the housing, and the centrifugal separator 3 removes part of the oil and water, and the foreign matter is removed by the fourth foreign matter removing means 52. Foreign matter is prevented from mixing in and dust and the like are prevented from scattering around.

The starting end of the fourth carrier 19 as described above is
It is arranged below the discharge port of the screw feeder 51 provided in the lower part of the first relay hopper 17 so as to face the discharge port, and the end portion is above the material cutting hopper 53 of the first molding device 4. The material cutting hopper 53 is arranged so as to face it. The fourth transfer device 19 removes a part of oil and water from the first raw material sent from the lower portion of the first relay hopper 17, and removes the metal waste from which the foreign matter is removed by the second foreign matter removing means 52. 1 The material cutting hopper 53 of the molding device 4 can be supplied from above.

As described above, the metal scrap from which the oil and water have been partially removed by the centrifuge 3 is not directly supplied from the centrifuge 3 to the first molding device 4, but the metal scrap is temporarily stored. 2nd conveyance means 1 provided with the 1st relay hopper 17 which performs
6, gradually supplied. Therefore, the difference between the operation cycles of the centrifuge 3 and the first molding apparatus 4 can be absorbed by the second conveying means, and the centrifuge 3 and the first molding apparatus 4 can be operated smoothly. it can.

Referring again to FIG. 1, the first molding device 4 includes the material cutting hopper 53 and the turntable 54.
And a pressing means 55. The material cutting hopper 53 is
An electromagnetic feeder is provided below the metal feeder, and metal scraps are quantitatively sent to a plurality of cylindrical dies provided on the turntable 54. The pressing means 55 is provided with a pressing tool that is movable in the vertical direction. The pressing tool is inserted into the die containing the metal scraps to press the metal scraps, and compression molding into a short cylindrical molded product. To be done. A discharge conveyor 84, which is realized by a belt conveyor, is provided extending from below the turntable 54 to above the bucket 24 on the molded product carriage 25, and the molded product thus formed is conveyed and dropped into the bucket 24. It The strength of the molded product and the like can be grasped by utilizing the impact caused by the drop at this time.

FIG. 4 is a front view schematically showing the vicinity of the third receiving hopper 13 and the third conveying means 20, and FIG. 5 is shown in FIG.
FIG. 6 is a side view schematically showing the device viewed from the right side of FIG. The upper part of the third receiving hopper 13 is arranged close to the floor surface near the doorway of the transport vehicle 43 for carrying in the second raw material of the deoiling plant 2,
The raw material is put into the third receiving hopper 13 directly from the transportation vehicle 43. An apron conveyor 56 is provided below the third receiving hopper 13, and the second raw material charged into the third receiving hopper 13 is delivered little by little. A stirring means 58 for loosening the second raw material is provided at the terminal end of the apron conveyor 56. The stirring means 58 is provided with a stirring body having a plurality of blades radially protruding from a rotating shaft that is rotatably supported around a horizontal axis. By rotating this stirring body, the second raw material is loosened. Can be sent out evenly.

Further, the second receiving hopper 13 is provided with an impact generating device 57 called a mag hammer or the like.
The second raw material maintains a uniform shape as a whole by the mutual engagement and friction of the metal scraps, forms a bridge between the inner walls of the second receiving hopper 13, so to speak, and does not fall downward. May not be able to send out. In this situation,
By impacting and vibrating the second receiving hopper 13 by the impact generator 57, the bridge can be broken and the second raw material can be dropped downward.

The first foreign matter removing means 5 is provided below the end of the apron conveyor 56. The first foreign matter removing means 5 called a vibro screen or the like has a sieve body 39 realized by a wire mesh and the like, and a vibration generator 60 for vibrating the sieve body 39. The vibration generator 60 periodically strikes the screen body 39 by the cam mechanism to vibrate the screen body 39. By vibrating the sieve body 39, metal scraps can be dropped downward to separate and remove foreign matters such as abrasive powder, nails, and fine stones existing as a lump. The removed foreign matter is conveyed by the first foreign matter conveying apparatus 34 realized by a belt conveyor, and is further conveyed to the foreign matter storage area 85 by the second foreign matter conveying apparatus 35 called a skip elevator or the like, which pulls up the bucket with a wire rope and conveys it. It is carried and then carried out of the deoiling factory 2.

The fifth transfer device 22 of the third transfer means 20 is
The second receiving hopper 13 realized by the belt conveyor.
The fifth transfer device 22 occupies a small space by arranging at a steep slope from the start end on the side toward the end on the second relay hopper 21 side. This fifth transfer device 2
The second conveyor belt has locking portions whose both ends in the width direction are raised so as to have a substantially U-shaped cross section, and which are raised at intervals in the longitudinal direction. With this, even if the fifth transfer device 22 is arranged at a steep slope, it is possible to smoothly transfer the metal scrap from which the foreign material has been removed from the second raw material to the downstream side in the transfer direction, that is, from the start end to the end. Further, the transport belt of the fifth transport device 22 is housed in the housing to prevent the foreign matter from mixing into the metal dust from which the foreign matter has been removed by the first foreign matter removing means 5 and to prevent dust from surrounding. Is prevented from scattering.

The starting end portion of the fifth transfer device 22 as described above is
The first foreign matter removing means 5 is disposed below the sieve body 39 so as to face the sieve body 39, and the terminal end portion is disposed above the second relay hopper 21 and face the second relay hopper 21. Has been done. By the fifth transfer device 22, it is possible to supply the metal scrap, from which the foreign substances are removed from the second raw material dropped from the sieve body 39, to the second relay hopper 21 from above.

A screw feeder 61 is provided below the second relay hopper 21 of the third conveying means 20.
The metal scraps from which the foreign substances have been removed from the second raw material put into the second relay hopper 21 by the fifth transport device 22 are sent out little by little. The sixth transfer device 23 of the third transfer means 20 is
The second relay hopper 21 realized by the belt conveyor.
The sixth conveying device 23 is arranged at a steep slope from the starting end on the side toward the terminating end on the second molding device 6 side.
Occupies less space. The conveying belt of the sixth conveying device 23 has locking portions whose both ends in the width direction are raised so as to have a substantially U-shaped cross section, and which are raised at intervals in the longitudinal direction. Thereby, even if the sixth transport device 23 is arranged at a steep slope, the metal waste from which the foreign matter is removed by the first foreign matter removing means 5 can be smoothly transported to the downstream side in the transport direction, that is, from the start end portion to the end portion. You can Further, the transport belt of the sixth transport device 23 is housed in the housing to prevent foreign matter from mixing into the metal scrap from which the foreign matter has been removed by the first foreign matter removing means 5, and to prevent dust from advancing to the surroundings. Is prevented from scattering.

The starting end of the sixth transfer device 23 is
It is arranged below the discharge port of the screw feeder 61 provided at the lower part of the second relay hopper 21 so as to face the discharge port, and the end portion is above the material cutting hopper 53 of the second molding device 6. The material cutting hopper 53 is arranged so as to face it. By the sixth transport device 23, metal scraps from which foreign substances have been removed from the second raw material sent from the lower part of the second relay hopper 21 are used as material cutting hoppers 53 of the second molding device 6.
Can be supplied from above. Here, since the second molding device 6 has the same configuration as the first molding device 4, the same reference numerals are given to the corresponding parts and the description thereof will be omitted.

In this way, the second raw material carried in is the second raw material.
Instead of being directly supplied to the molding device 6, it is put into the third receiving hopper 13 and the first foreign matter removing means 5 is fed from the third receiving hopper 13.
It is supplied to the second molding device 6 by the third transporting means 20 via. Therefore, the second raw material is supplied to the third receiving hopper 13
By temporarily storing in the second raw material, the difference between the carry-in cycle of the second raw material and the operation cycle of the first foreign matter removing means 5 is absorbed to smoothly carry in the second raw material and operate the first foreign matter removing means 5. can do.

Further, the metal waste from which the foreign matter has been removed by the first foreign matter removing means 5 is not directly supplied from the first foreign matter removing means 5 to the second molding device 6, but is temporarily stored as the second metal waste. It is gradually supplied by the third transfer means 20 including the relay hopper 21. Therefore, the third transport means 20
Through the first foreign matter removing means 5 and the second molding device 6
It is possible to smoothly operate the first foreign matter removing device 5 and the second molding device 6 by absorbing the difference in the operation cycle between the first foreign substance removing device 5 and the second molding device 6.

Referring again to FIG. 1, the molded product truck 25 is
Two buckets 24 are placed on each molded product carriage 25, which are provided corresponding to the first and second molding devices 4 and 6, respectively. The molded products formed in the first and second molding devices 4 and 5 are loaded into one of the buckets 24 mounted on the corresponding molded product carriage 25. When one of the buckets 24 mounted on the molded product carriage 25 is filled with the molded product, the molded product carriage 25 is moved to the other of the buckets 24 mounted on the molded product carriage 25. It is thrown in. The bucket 24 filled with the molded product is placed on the receiving temporary placing table 29 by the crane 59, and the bucket 24 that stores the molded product formed by the first molding device 4 is first removed by the bucket transfer means 27. The bucket 24 in which the molding formed by the second molding device 6 is stored in the oil furnace 9 is the second deoiling furnace 10
Are charged to each.

The moldings thus formed by the first and second molding apparatuses 4 and 6 are directly transferred from the first and second molding apparatuses 4 and 6 to the first and second deoiling furnaces 9 and 10. Without loading, one set of two units is loaded into a bucket 24 mounted on a molded product truck 25 provided corresponding to the first and second molding apparatuses 4 and 6, and the bucket 24 is a bucket transport means. 27 by the first and second deoiling furnaces 9, 10
Is charged to. Therefore, by inserting the molded product into the bucket 24 and temporarily storing the molded product by the molded product carriage 25 and the bucket carrying means 27, it is possible to absorb the difference in the mutual operation cycle and to operate smoothly.

Further, by providing the molded product trucks 25 corresponding to the first and second molding devices 4 and 6, respectively, the first and second molding devices 4 and 6 are simultaneously operated,
A molded product can be formed and placed in each of the buckets 24. Moreover, two buckets are placed on the molded product carriage 25, and the bucket 24 filled with the molded product is
It is not necessary to stop the first and second molding devices 4 and 6 even when replacing. Furthermore, since the molded product is loaded into the first and second deoiling furnaces 9 and 10 while being housed in the bucket 24, so-called batch processing can be performed on a plurality of molded products as a group. It is possible to facilitate the quantitative control of the molded products and to save the labor of charging the molded products into the heating chambers of the deoiling furnaces 9 and 10 and discharging the molded products from the heating chambers. . Moreover, each molded product can be heated uniformly by making the laminated thickness of the molded product uniform in the heating chamber. Further, since the bucket 24 has air permeability, the atmospheric gas in the heating chamber can be easily introduced from the outside of the bucket 24 into the bucket 24, and uniform heating can be assisted.

FIG. 6 is a side view schematically showing the vacuum deoiling means 7 and the oil / water recovery means 8. The reduced-pressure deoiling means 7 includes first and second deoiling furnaces 9 and 10, and an oil / water collecting means 8 is provided.
Is provided corresponding to each of the deoiling furnaces 9 and 10, but here, only the first deoiling furnace 9 will be described, and description of the second deoiling furnace 10 having the same configuration will be omitted. . The first deoiling furnace 9 is provided with a door 62 on the front side that closes the heating chamber in the first deoiling furnace 9 so as to be openable and closable. The bucket carrier 27 is provided on the front side of the door 62, that is, on the left side of FIG.
Is provided. The bucket carrier 27 includes a mounting table 64 that can be lifted and lowered by a lifting device 63, and the bucket 24 is mounted on the mounting table 64. Bucket insertion / ejection means 65 is provided on the mounting table 64, and with the door 62 opened, the bucket insertion / ejection means 65 is provided.
The bucket 24 is charged into and discharged from the heating chamber.

In the heating chamber of the first deoiling furnace 9, there is arranged heating means 66 realized by a radiant tube or the like heated by an oil-fired burner (not shown). A circulation fan 68 is attached to the upper part of the first deoiling furnace 9 so as to face the heating chamber, and an introducing pipe 67 for guiding an inert gas such as N ₂ gas is further provided in the heating chamber. Further, the vacuum deoiling means 7 is provided with a depressurizing means 78 for depressurizing the heating chamber of the first deoiling furnace 9. The first deoiling furnace 9 and the pressure reducing means 78 are connected by an exhaust pipe 69. Decompression means 78
Has a roots pump 74 and an oil rotary pump 75, and sucks and discharges the gas in the heating chamber configured with the door 62.

In the molded product loaded in the heating chamber while being accommodated in the bucket 24, the inert gas is introduced through the introduction pipe 67 after the air is exhausted by the pressure reducing means 78, and the molded product is placed in the inert gas atmosphere. Then, it is heated by the heating means 66. At this time, the inert gas in the heating chamber is convected by the circulation fan 68. In this way, the air in the heating chamber is expelled, and after being replaced with an inert gas, it is heated, so there is no oxygen in the heating chamber, and there is no danger of the oil in the molding exploding and burning. . In addition, deterioration of oil quality due to oxidation of oil content can be prevented. Furthermore, the inert gas heated to a high temperature can be brought into contact with the molded product, and the molded product can be heated in a short time. After the molded product is heated, the atmospheric gas in the heating chamber is sucked by the decompression means 78, the pressure in the heating chamber is reduced, and the remaining oil and water are vaporized to become vapor. Also at this time, the molded product is heated so as to be kept at a predetermined temperature in order to promote the vaporization. The vaporized oil and water are decompressed by the decompression means 78.
Is sucked in and guided to the exhaust pipe 69. Also, by heating the molded product, the viscosity of oil and water decreases,
It flows out from inside the molded product and accumulates at the bottom of the heating chamber.

An oil condenser 70 is interposed in the exhaust pipe 69. In the oil condenser 70, the vaporized oil and moisture are liquefied by cooling the vaporized vapor of the oil and moisture. The liquefied oil and water are stored in the recovery tank 71, and the oil and water accumulated at the bottom of the heating chamber are also guided to and stored in the recovery tank 71 by the recovery pipe 79. And water. The oil / water recovery means 8 is configured to include the oil condenser 70 and the recovery tank 71.

A filter 73 is provided downstream of the oil condenser 70 in the exhaust pipe 69 in the gas discharge direction, so that polishing dust and the like are separated from the molded product to cause a roots pump 74.
And, it is prevented that the oil rotary pump 75 is guided and damaged. An oil rotary pump 75 is connected to the downstream side of the roots pump 74 in the gas discharge direction, and an exhaust pipe 77 including an oil mist trap 76 is connected to the oil rotary pump 75. The atmospheric gas led to the roots pump 74 and the oil rotary pump 75 passes through an oil mist trap 76 and a combustor that burns a combustible gas (not shown),
It is cleaned, etc., so that it can be released, and then released into the atmosphere.

In this embodiment, the recovered oil is used as a combustion fuel in an oil-fired burner. Combustion gas generated in the oil-fired burner is guided to a radiant tube, used to heat a molded product in the heating chamber, and then released to the atmosphere. Instead of the oil-fired burner, a gas burner, an electric heater or the like may be used for heating. If an oil-fired burner is used, the recovered oil can be effectively used.

FIG. 7 is a side view schematically showing the payout means 32. The payout means 32 has a tilting base 82 fixed to a rotary shaft 81 that is rotatably supported around a horizontal axis. A drive device (not shown) is connected to the rotation shaft 81, and the tilting table 82 is rotated by rotating the rotation shaft 81.
Can be tilted. The bucket 24 is detachably fixed to the tilting table 82, and the bucket 24 can be tilted by tilting the tilting table 82. Such a tilting table 82 is disposed slightly above the height of the transportation vehicle 33 for carrying out from the floor of the oil removal factory 2.
With the transportation vehicle 33 arranged below the tilting table 82,
By tilting the bucket 24, the bucket 24
The molded product therein can be mounted on the transportation vehicle 33.
Further, a dust collecting hood 83 is provided near the tilting table 82. A dust collecting device (not shown) is connected to the dust collecting hood 83 to collect dust scattered when the molded product is mounted on the transportation vehicle 33.

In this manner, the molded product is dispensed from the vacuum deoiling means 7 to the transporting vehicle 33 for unloading directly, and is dispensed via the dispensing means 32. Therefore, by the discharging means 32, the difference between the operation cycle of the vacuum deoiling means 7 and the carry-out cycle of the molded article is absorbed by the discharging means 32, and the operation of the vacuum deoiling means 7 and the carry-out of the molded article are smoothly performed. Can be done. Furthermore, since the molded product storage 31 is provided, by temporarily mounting the molded product, it is possible to more smoothly operate the vacuum deoiling means 7 and carry out the molded product.

The deoiling factory 2 is also provided with an operation room 86 having a central operation panel. The central operation panel of this operation chamber 86 is, so to speak, a pretreatment facility from the time when the first and second raw materials are loaded to the time when they are supplied to the first and second molding apparatuses 4 and 6, and the first and second molding apparatuses. Molding equipment including 4, 6 and molded product truck 25, and bucket transport means 2
7, the so-called deoiling furnace equipment including the reduced pressure deoiling means 7 and the oil / water recovery means 8, and the carry-out means 32, and the operation control can be performed comprehensively within each division.

In addition, the vacuum deoiling means 7 is provided with a machine side control panel capable of controlling the first and second deoiling furnaces 9 and 10 in common, and a machine side control panel capable of individually controlling each. , The operation can be controlled individually. The first and second molding apparatuses 4 and 6 are also provided with machine-side control boards, respectively, so that the operation can be controlled individually. Further, the molded product truck 25, the carry-out means 32, and the third receiving hopper 13 are also provided with machine-side control panels, respectively, so that the operations can be controlled individually.

FIG. 8 is a flow chart showing a step of compressing the loaded first raw material to form a molded product. First
When the first raw material is carried in by the transport vehicle 38 for carrying in the raw material, the first raw material is stored in step m1 depending on the remaining amount of the first raw material in the first and second receiving hoppers 11 and 12, for example. The destination of the transportation container 42 is selected.
When it is selected to move to the receiving hopper, the process proceeds to step m3, and when it is selected to move to the raw material yard, the container 59 is moved by the crane 59 at step m2.
8 and is placed on the raw material storage 37. The first raw material is carried in by the transportation vehicle 38, and the step m3 is directly performed.
Or to move to step m3 in order to start the processing of the first raw material which has already been loaded and placed on the raw material storage 37, the first and second hoppers are provided as hoppers for feeding the first raw material. One of the second receiving hoppers 11 and 12 is selected.

When the first receiving hopper 11 is selected, the carrying container 42 is moved by the crane 59 in step m4 so that the first raw material is transferred from the carrying container 42 to the first receiving hopper 11.
Is thrown into. The first raw material charged into the first receiving hopper 11 is transported by the first transport device 14 in step m5 and supplied to the centrifuge 3 in step m8. On the other hand, when the second receiving hopper 12 is selected, step m6
Then, the transport container 42 is moved by the crane 59,
The raw material is put into the second hopper 12 from the transportation container 42. The first raw material charged into the second receiving hopper 12 is transported by the second transport device 15 in step m7 and supplied to the centrifuge 3 in step m8.

The metal waste supplied to the centrifuge 3 is centrifuged in step m9 to mechanically remove a part of oil and water from the first raw material. The metal waste from which a part of the oil and water has been removed is transported by the third transport device 18 in step m10, and the foreign matter is removed by the second foreign matter removing means 52 provided above the first relay hopper 17,
At step m11, the first relay hopper 17 is loaded. The metal scraps in the first relay hopper are transported by the fourth transport device 19 in step m12, and are supplied to the material cutting hopper 53 of the first molding device 4 in step m13.

The metal scrap supplied to the material cutting hopper 53 of the first molding device 4 is compression-molded by the first molding device 4 in step m14 to form a molded product. The formed product is carried out from the first molding device 4 by the carry-out conveyor 84 in step m15, and is loaded into the bucket 24 on the molded product carriage 25 in step m16, and the process up to the formation of the molded product is completed.

FIG. 9 is a flow chart showing a process of depressurizing the molded product formed by the first molding device 4 by the vacuum deoiling means 7 and carrying it out from the deoiling factory 2.

The molded product formed in the step shown in FIG. 8 is accommodated in the bucket 24 on the molded product carriage 25, and the bucket 24 is moved by the crane 59 in step n1 and placed on the temporary receiving stand 29. Placed. The bucket 24 on the receiving temporary storage table 29 is the bucket transport means 27 in step n2.
After being received by, it is loaded into the first deoiling furnace 9. The molded product housed in the bucket 24 and charged into the first deoiling furnace 9 is deoiled under reduced pressure in the heating chamber of the first deoiling furnace 9 in step n3 to remove residual oil and water. To be done.

In the process of step n3, the vapor of the oil and water in the first deoiling furnace, which is removed from the molded product and vaporized,
It is cooled and recovered outside the furnace by the oil / water recovery means 8. As a result, the oil content contained in the metal scrap is separated and recovered. Therefore, the recovered oil can be used as a combustion fuel for the vacuum deoiling means for burning the oil-fired burner, for example, and resource saving can be achieved.

When the deoiling process in the first deoiling furnace 9 is completed, the bucket 24 in the first deoiling furnace 9 is processed in step n4.
Are discharged from the first deoiling furnace 9 by the bucket transport means 27 and placed on the temporary disposing table 30. Dispensing temporary storage table 30
In step n5, the destination of the bucket 24 placed on is selected, for example, depending on the ready state of the carrying vehicle 33 for unloading. If it is selected to move to the carry-out means 32, the process proceeds to step n7, and if it is selected to move to the molded product storage, the bucket 24 is moved to the molded product storage 31 by the crane 59 in step n6. When the process moves from step n6 directly to step n7, or when the process proceeds to step n7 when the ready-to-carry out of the moldings placed on the moldings storage 31 is completed, the bucket 24 is moved by the crane 59,
It is fixed to the tilting table 82 of the carry-out means 32. The bucket 24 fixed to the tilting table 82 is moved to the tilting table 8 in step n8.
2 is tilted by tilting, and the bucket 2
The molded product in No. 4 is mounted on the transportation vehicle 33, and is carried out to a steelmaking factory or the like by the transportation vehicle 33.
All the processing steps of the first raw material in are completed.

FIG. 10 is a flow chart showing a process of compressing the carried-in second raw material to form a molded product. When the second raw material is carried in by the transporting vehicle 43 for carrying in the second raw material, it is directly loaded into the third receiving hopper 13 from the transporting vehicle 43 in step a1. The second raw material introduced into the third receiving hopper 13 is conveyed by the apron conveyor 56 in step a2, and foreign matter is removed by the first foreign matter removing means 5 in step a3. The metal scrap from which the foreign matter is removed is transported by the fifth transport device 22 in step a4, and is thrown into the second relay hopper 21 in step a5.
The metal scraps in the second relay hopper 21 are removed by the sixth step a6.
It is transported by the transport device 23 and is supplied to the material cutting hopper 53 of the second molding device 6 in step a7.

The metal scraps supplied to the material cutting hopper 53 of the second molding device 6 are compression-molded by the second molding device 6 in step a8 to form a molded product. The formed product is secondly transferred by the carry-out conveyor 84 in step a9.
The product is unloaded from the molding apparatus 6 and loaded into the bucket 24 on the molded product truck 25 in step a10, and the process up to the formation of the molded product is completed. On the other hand, in step a3, the removed foreign matter is transported by the first foreign matter transporting device 34 in step a11, further transported by the second foreign matter transporting device 35 to the foreign matter storage 85 in step a12, and then in step a13.
Is carried out of the deoiling factory 2.

FIG. 11 is a flow chart showing a process of depressurizing the molded product formed by the second molding device 6 by the vacuum deoiling means 7 and carrying it out from the deoiling factory 2. The molded product formed in the process shown in FIG. 10 is stored in the bucket 24 on the molded product truck 25, and the step b
At 1, the bucket 24 is moved by the crane 59 and placed on the temporary receiving stand 29. The bucket 24 on the temporary receiving stand 29 is loaded into the first deoiling furnace 9 after being received by the bucket carrying means 27 in step b2.
The molded product housed in the bucket 24 and charged into the first deoiling furnace 9 is deoiled under reduced pressure in the heating chamber of the first deoiling furnace 9 in step b3 to remove residual oil and water. To be done.

In the step b3, the vapor of the oil and water in the first deoiling furnace which is removed from the molded product and vaporized is
It is cooled and recovered outside the furnace by the oil / water recovery means 8. As a result, the oil content contained in the metal scrap is separated and recovered. Therefore, the recovered oil can be used as a fuel for combustion of the vacuum deoiling means for burning with an oil-fired burner, for example, and resource saving can be achieved.

When the deoiling process in the first deoiling furnace 9 is completed, the bucket 24 in the first deoiling furnace 9 is operated at step b4.
Are discharged from the first deoiling furnace 9 by the bucket transport means 27 and placed on the temporary disposing table 30. Dispensing temporary storage table 30
In step b5, the destination of the bucket 24 placed on is selected, for example, depending on the preparation state of the carrying vehicle 33 for unloading. When it is selected to move to the carry-out means 32, the process proceeds to step b7, and when it is selected to move to the molded product storage, the bucket 24 is moved to the molded product storage 31 by the crane 59 in step b6. When step b6 directly moves to step b7, or when the ready-to-carry-out preparation of the molded article placed in the molded article storage area 31 is completed and the procedure proceeds to step b7, the bucket 24 is moved by the crane 59,
It is fixed to the tilting table 82 of the carry-out means 32. The bucket 24 fixed to the tilting table 82 is moved to the tilting table 8 in step b8.
2 is tilted by tilting, and the bucket 2
The molded product in No. 4 is mounted on the transportation vehicle 33, and is carried out to a steelmaking factory or the like by the transportation vehicle 33.
All the processing steps of the first raw material in are completed.

In this way, the metal scraps obtained by centrifuging part of the oil and water from the first raw material and the metal scraps obtained by removing foreign substances from the second raw material are compression molded into solid moldings. To be done. Each compression molded product is heated under reduced pressure in the first or second deoiling furnace 9 or 10 to remove residual oil and water.

Thus, the metal scrap containing a large amount of oil is treated as the first raw material, the metal scrap containing a small amount of oil is treated as the second raw material, and the metal scrap containing a large or small amount of oil is treated. By treating the metal scrap in different treatment steps depending on the property, the treatment efficiency can be improved as described above. Further, it is possible to handle the metal scrap containing the foreign matter such as the abrasive powder as the second raw material to facilitate the operational management. Further, it is possible to remove the foreign matter also in the processing step of the first raw material, and even if the first raw material contains the foreign matter, the operational management is easy.

In addition, the first raw material and the second raw material are processed in different steps and then compression-molded, so that the properties such as the oil content of each of the first and second raw materials are almost the same. Can be Therefore, the processing operation such as heating by the vacuum deoiling means can be similarly performed regardless of whether the molded product is made of the first or second raw material.

Further, since metal scraps are molded to increase the bulk specific gravity, and moreover, compression molding is performed. Therefore, when a plurality of molded products are housed in a bucket and charged into a heating chamber, the atmosphere gas inside the bucket is filled. A good airflow between each molded product in, to obtain a wide contact surface with the atmosphere gas of each molded product, uniformly heat all the molded products in the bucket,
The processing capacity of vacuum deoiling is improved. In addition, compression molding of metal scraps improves the heat transfer of each molded product, so it is possible to quickly raise the temperature inside each molded product, and to reduce the viscosity of the oil inside the molded product in a short time. It can be lowered, dropped and vaporized. Furthermore, since the molded product is heated under reduced pressure, the densities in the deoiling furnaces 9 and 10 can be reduced, the vaporization rate of oil and water can be increased, and the overall operation cycle time can be shortened. it can.

Further, since the molded product is loaded into the heating chambers of the deoiling furnaces 9 and 10 while being housed in the bucket 24, so-called batch processing can be performed, so that quantitative management of the molded product is easy. In addition to charging the molded product into the heating chamber of each of the deoiling furnaces 9 and 10,
It is possible to save the labor of discharging work from the heating chamber 10. Moreover, each molded product can be heated uniformly by making the laminated thickness of the molded product uniform in the heating chamber. Further, since the bucket 24 has air permeability, the atmospheric gas can be guided into the bucket 24 to assist in uniform heating.

Further, since the air in the heating chamber is expelled and replaced with an inert gas and then heated, there is no oxygen in the heating chamber, and there is a risk that the oil content in the molded product will explode and burn. Absent. In addition, deterioration of oil quality due to oxidation of oil content can be prevented. Further, the molded product in the bucket 24 is convectively heated by causing convection of the inert gas in the heating chambers of the deoiling furnaces 9 and 10. As a result, the inert gas heated to a high temperature can be brought into contact with the molded product, and the molded product can be heated within a short time.

Further, the molded product deoiled and dehydrated by the vacuum deoiling means 7 is sampled before being mounted by the unloading means 32 on the carrying vehicle 33 for unloading. The extracted sample is tested in a separate test room to determine whether the oil content is the above-mentioned amount that does not cause abnormal combustion, that is, about 1% by weight or less. That is, it can be confirmed whether or not it is suitable as a main raw material for obtaining the molten metal. If, as a result of the test, it is determined that the content may cause abnormal combustion,
The bucket 24 containing the sample is again charged into the first or second deoiling furnace 9 or 10 to be deoiled. Therefore, the abnormal combustion can be prevented with high probability. Further, the operating conditions of the centrifuge 3, the first and second molding devices 4, 6 and the vacuum deoiling means 7 can be improved based on the test results.

[0105]

According to the present invention as set forth in claim 1, the metal scrap from which a part of the oil and water is removed by the centrifugal separation means from the first raw material consisting of the metal scrap containing oil and water is 1. A molded product is compression molded by a molding means. Further, the metal scrap from which the foreign material has been removed by the first foreign material removing means from the second raw material made of metal scrap containing oil and water and a foreign material in the form of powder or granules is compression molded into a molded product by the second molding means. .. Each molded product compression-molded by the first and second molding means is heated under reduced pressure in the airtight heating chamber by the vacuum deoiling means,
Residual oil and water are removed.

As a result, the metal scrap containing a large amount of oil is treated as the first raw material, and the oil and water are mechanically removed by the centrifuge means to form a molded product, which is subsequently removed under reduced pressure. The load on the oil means can be reduced, and the processing efficiency can be improved. That is,
When the amount of oil contained in the metal scraps is large, the amount of oil that can be removed in a short time by the centrifugal separation means is large and the cost is low. In addition, the processing efficiency can be improved from the economical aspect.

Further, the metal scrap containing a small amount of oil can be treated as the second raw material to improve the processing efficiency. That is, when the amount of oil contained in the metal scrap is small, the amount of oil that can be removed by the centrifugal separation means is small,
There is almost no difference in the amount of oil that must be removed by the vacuum deoiling means, depending on whether or not it is processed by the centrifugal separation means. On the contrary, the processing by the centrifuging means consumes wasteful time and power, and reduces the processing efficiency in terms of time and economy.
Therefore, the processing efficiency can be improved by forming the molded product without using the centrifugal separation means. in this way,
The metal scraps can be processed in different processing steps according to the properties of the metal scraps such as whether the contained oil content is large or small, and the processing efficiency can be improved.

Further, the metal scrap containing the foreign matter can be handled as the second raw material to facilitate the operational management. That is, the foreign matter often exists in the form of a hard lump, and therefore, when compression molding is performed in a state where the foreign matter is contained, the foreign matter is caught in the second molding means and the second
There is a risk that the molding means will be damaged or a malfunction such as an operation stop will occur, but since the foreign matter is removed by the first foreign matter removing means, the malfunction does not occur and the operational management is easy. Can be

In addition, after the first raw material and the second raw material are processed in different steps, compression molding is performed, so that the properties such as the oil content of each of the first and second raw materials are almost the same. Can be Therefore, the processing operation such as heating by the vacuum deoiling means can be similarly performed regardless of whether the molded product is made of the first or second raw material.

Further, under reduced pressure, since the density in the heating chamber becomes small, the evaporation rate of oil and water is high, and the time required for removing oil and water by the vacuum deoiling means is short, and The operating cycle time of can be shortened. Furthermore, since the molded product is heated,
Vaporization of the oil and water can be promoted.

Further, when the metal scrap is compression-molded into a molded product to increase the bulk specific gravity, the operation of the vacuum deoiling means is operated as compared with the case where the metal scrap in a state not compression-molded is charged into the heating chamber. It becomes possible to load a large amount of metal scrap in each cycle. Moreover, since compression molding is performed, when a plurality of molded products are accommodated in the bucket and charged into the heating chamber, the ventilation of the atmospheric gas between the molded products in the bucket is improved, and the atmospheric gas of each molded product is improved. It is possible to obtain a wide contact surface with, and evenly heat all moldings in the bucket,
The processing capacity of vacuum deoiling can be improved. further,
Since heat transfer of individual molded products is improved by compression molding metal scrap, it is possible to quickly raise the temperature inside each molded product and reduce the viscosity of the oil inside the molded product in a short time. Can be dropped and vaporized.

Further, the vaporized steam of oil and water in the heating chamber is guided to the oil / water recovery means and cooled to recover the oil and water. As a result, the oil content contained in the metal scrap is recovered from the metal scrap. Therefore, the recovered oil can be reused, for example, as fuel for combustion of the vacuum deoiling means, and resource saving can be achieved.

According to the second aspect of the present invention, the metal scrap from which a part of the oil and water has been removed by the centrifugal separation means is blown to remove the foreign matter. As a result, the metal scrap containing a large amount of oil and containing foreign matter such as abrasive powder is handled as the first raw material, and the foreign matter is removed after mechanically removing a part of the oil and water by the centrifugal separation means. By forming the molded product, the load on the subsequent vacuum deoiling means can be reduced, the processing efficiency can be improved, and the operational management can be facilitated.

That is, when the amount of oil contained in metal scraps is large, the amount of oil that can be removed by the centrifugal separation means in a short time is large and the cost is low, and when the oil is removed only by the vacuum deoiling means. In comparison, the processing efficiency can be improved in terms of time and economy. Moreover,
The foreign matter is often present in the form of a hard lump, and therefore, when compression molding is performed in a state in which the foreign matter is contained, the foreign matter is caught in the first molding means and the first molding means is damaged or the operation is stopped. However, since the foreign matter is removed by the second foreign matter removing means, there is no possibility of causing the problem and operational management can be facilitated.

According to the third aspect of the present invention, the deoiling furnaces are respectively provided in parallel with each other in one side of the depressurizing deoiling means provided with the deoiling furnaces each having the heating chamber. The first and second molding means are arranged side by side in a second direction perpendicular to. A plurality of molded product carts that are movable in the second direction are provided between each molding device and the vacuum deoiling device, and a breathable bucket on which the molded product is loaded is mounted. In front of each deoiling furnace, a bucket carrying means is provided so as to be movable in the first direction, and the bucket into which the molded product is loaded on the molded product truck is loaded into the heating chamber and discharged from the heating chamber. be able to.

As a result, the molded products formed by the respective molding means are not directly charged from the respective molding means into the deoiling furnaces provided with the heating chambers, but are loaded into the bucket mounted on the molded product carriage. Then, this bucket is loaded into the heating chamber by the bucket carrying means. Therefore, in order to prevent each molding device and each deoiling furnace from being affected by the mutual operation cycle, the molded product is put into a bucket and temporarily stored to absorb the difference between the mutual operation cycles. do it,
You can drive smoothly. Further, since the molded products are loaded into each deoiling furnace while being housed in the bucket, so-called batch processing can be performed on a plurality of molded products as a group, and the quantitative management of the molded products is easy. In addition, it is possible to save the labor of loading the molded product into the heating chamber and discharging the molded product from the heating chamber. Moreover, each molded product can be heated uniformly by making the laminated thickness of the molded product uniform in the heating chamber. Further, the bucket has air permeability, and the atmospheric gas in the heating chamber can be easily introduced from the outside of the bucket into the inside of the bucket, and uniform heating can be assisted.

According to the fourth aspect of the present invention, the first conveying means for conveying the first raw material is provided between the first raw material hopper into which the first raw material is charged and the centrifugal separating means. As a result, the carried-in first raw material is not directly supplied to the centrifugal separation means, but is put into the first raw material hopper and is supplied from the first raw material hopper to the centrifugal separation means by the first conveying means. Therefore, the first raw material is fed to the first raw material so that the loading of the first raw material and the operation of the centrifuging means are not mutually influenced.
By temporarily storing in the raw material hopper, the difference between the carry-in cycle of the first raw material and the operation cycle of the centrifugal separation means can be absorbed, and the carry-in of the first raw material and the operation of the centrifugal separation means can be smoothly performed. it can.

Further, between the centrifuging means and the first molding means, there is provided a second conveying means for conveying the metal scraps from which the oil and water have been partially removed from the first raw material. As a result, the metal scrap from which the oil and water have been partially removed by the centrifugal separation means is not directly supplied from the centrifugal separation means to the first molding means, but is gradually supplied by the second transfer means. Therefore, the operation of the centrifuge means and the operation of the first molding means are intervened by the second transfer means so that the operation of the first molding means and the operation of the first molding means are not affected by each other. Thus, the centrifugal separation means and the first molding means can be operated smoothly.

Further, between the second raw material hopper into which the second raw material is charged and the second molding means, there is provided a third transport means for transporting the metal scrap from which the foreign matter has been removed by the first foreign matter removing means. . As a result, the second raw material carried in is the first
Instead of being directly supplied to the second molding means via the foreign matter removing means, it is fed into the second raw material hopper and supplied from the second raw material hopper via the first foreign matter removing means to the second molding means by the third conveying means. It Therefore, the second raw material is temporarily stored in the second raw material hopper so that the carry-in of the second raw material, the operation of the first foreign matter removing unit, and the operation of the second molding unit are not mutually affected, And, by passing through the third conveying means, the difference between the carry-in cycle of the second raw material, the operation cycle of the foreign matter removing means, and the operation cycle of the second molding means is absorbed,
It is possible to smoothly carry in the second raw material, operate the first foreign matter removing unit, and operate the second molding unit.

According to the fifth aspect of the present invention, the molded product from which the oil content and the water content have been removed by the vacuum deoiling means is delivered to the transportation vehicle by the delivery means. As a result, the molded product is dispensed from the vacuum deoiling means to the transporting vehicle without being dispensed directly to the transporting vehicle via the dispensing means. Therefore, in order to prevent the operation of the vacuum deoiling means and the carry-out of the molded article from mutually affecting each other, the difference between the operation cycle of the vacuum deoiling means and the carry-out cycle of the molded article is absorbed by way of the discharging means, It is possible to smoothly operate the vacuum deoiling means and carry out the molded product.

According to the sixth aspect of the present invention, the metal scraps obtained by centrifuging a part of the oil and water from the first raw material composed of the metal scraps containing oil and water are
It is compression molded into a molded product. Further, the metal scrap from which the foreign matter is removed from the second raw material made of the metal scrap containing the oil content, the water content, and the particulate foreign matter is compression-molded into a molded product. Each compression molded product is heated under reduced pressure in a heating chamber to remove residual oil and water.

Thus, the metal scrap containing a large amount of oil is treated as the first raw material, centrifugally separated to mechanically remove a part of the oil and water, and then a molded product is formed. It is possible to reduce the load of oil processing and improve processing efficiency. In other words, when the amount of oil contained in metal scraps is large, the amount of oil that can be removed in a short time by centrifugation is large, and at a low cost, compared to the case of removing oil only by vacuum deoiling treatment. The processing efficiency can be improved in terms of time and economy.

Further, the processing efficiency can be improved by handling the metal scrap containing a small amount of oil as the second raw material. In other words, when the amount of oil contained in metal scraps is small, the amount of oil that can be removed by centrifugation is small, and the amount of oil that must be removed by vacuum deoiling treatment is almost There is no difference. On the contrary, the centrifugal separation consumes wasteful time and power, and reduces the processing efficiency in terms of time and cost. Therefore, the processing efficiency can be improved by forming the molded product without centrifugation. In this way, the treatment efficiency can be improved by treating the metal scraps in different treatment steps according to the properties of the metal scraps, such as whether the contained oil content is large or small.

Furthermore, it is possible to handle the metal scrap containing the foreign matter as the second raw material and facilitate the operational management. That is, the foreign matter often exists in the form of a hard lump, and therefore, when compression molding is performed in a state where the foreign matter is contained, there is a possibility that a device for compression molding may be damaged or operation may be stopped. However, since the foreign matter is removed, there is no possibility that the above-mentioned trouble will occur, and operational management can be facilitated.

In addition, the first raw material and the second raw material are processed in different steps and then compression-molded, so that the moldings made of the first and second raw materials have substantially the same properties such as the oil content. Can be Therefore, the processing operation such as heating by the vacuum deoiling means can be similarly performed regardless of whether the molded product is made of the first or second raw material.

Furthermore, since the molded product is heated under reduced pressure,
The density in the heating chamber can be reduced, the evaporation rate of oil and water can be increased, and the time required to remove the oil and water by vacuum deoiling treatment can be shortened,
The overall operation cycle time can be shortened. Furthermore, since the molded product can be heated, vaporization of oil and water can be promoted.

Further, when the metal scrap is formed into a molded product to increase the bulk specific gravity, it is compared with the case where the metal scrap is charged into the deoiling furnace without being compression-molded. It becomes possible to charge a large amount of metal scrap for each operation cycle of. Moreover, since compression molding is performed, when a plurality of molded products are accommodated in the bucket and charged into the heating chamber, the ventilation of the atmospheric gas between the molded products in the bucket is improved, and the atmospheric gas of each molded product is improved. It is possible to obtain a wide contact surface with and to uniformly heat all the moldings in the bucket, and improve the processing capacity of vacuum deoiling. Furthermore, by heat-molding metal scraps, the heat transfer of each molded product will be good,
The temperature can be rapidly raised to the inside of each molded product, and the viscosity of the oil inside the molded product can be lowered in a short time, and the oil can be dropped and vaporized.

Further, the exhaust gas containing the vaporized steam of oil and water in the heating chamber is cooled outside the furnace and recovered.
As a result, the oil content contained in the metal scrap is separated and recovered. Therefore, the recovered oil can be used as a combustion fuel in the vacuum deoiling process, for example, and resource saving can be achieved.

According to the present invention as set forth in claim 7, air is blown to the metal scrap from which a part of oil and water has been removed by centrifugation to remove foreign matters and then compression molding. by this,
Metal scrap containing a large amount of oil and foreign matter such as abrasive powder is treated as the first raw material, and after mechanically removing a part of oil and water by centrifugation, the foreign matter is removed to form a molded product. By doing so, the load of the subsequent heat treatment can be reduced, the treatment efficiency can be improved, and the operational management can be facilitated.

That is, when the amount of oil contained in metal scraps is large, the amount of oil that can be removed in a short time by centrifugal separation is large, and it is more time and economical than the case of removing oil only by heat treatment. From the aspect, the processing efficiency can be improved. Moreover, foreign matter often exists in the form of hard lumps, and therefore, when compression molding is performed in a state in which this foreign matter is contained, problems such as damage to the means for foreign matter compression molding or operation stoppage occur. Although there is a risk, since the foreign matter is removed, there is no possibility that the above-mentioned trouble will occur, and operational management can be facilitated.

According to the present invention of claim 8, since the molded product is loaded into the heating chamber while being housed in the bucket,
So-called batch processing can be performed on a plurality of molded items as a group, which facilitates quantitative control of the molded items, and also enables charging and discharging of the molded items into and from the heating chamber. You can save the trouble. Moreover, each molded product can be heated uniformly by making the laminated thickness of the molded product uniform in the heating chamber. Further, since the bucket has air permeability, the atmospheric gas in the heating chamber can be easily introduced into the bucket from the outside of the bucket, and uniform heating can be assisted.

According to the present invention of claim 9, since the air in the heating chamber is expelled and replaced with an inert gas and then heated, oxygen does not exist in the heating chamber and the oil content in the molded product is reduced. There is no danger of explosion and burning. In addition, deterioration of oil quality due to oxidation of oil content can be prevented. Furthermore, since the inert gas in the heating chamber is convected, the inert gas heated to a high temperature can be brought into contact with the molded product, and the molded product can be heated in a short time.

[Brief description of drawings]

FIG. 1 is a plan view schematically showing a deoiling factory 2 including a deoiling facility 1 according to an embodiment of the present invention.

FIG. 2 is a system diagram showing a treatment process of the deoiling equipment 1.

FIG. 3 is a side view schematically showing a second carrying means 16.

FIG. 4 is a front view schematically showing the vicinity of a third receiving hopper 13 and a third conveying device 20.

FIG. 5 is a side view schematically showing a right side of FIG.

FIG. 6 is a side view schematically showing a vacuum deoiling means 7 and an oil / water recovery means 8.

FIG. 7 is a side view schematically showing a payout means 32.

FIG. 8 is a flowchart showing a process of compressing the carried-in first raw material to form a molded product.

FIG. 9 is a flowchart showing a process of heating the molded product formed by the first molding device 4 by the vacuum deoiling means 7 and carrying it out from the oil removal factory 2.

FIG. 10 is a flow chart showing a process of forming a molded product by compressing the loaded second raw material.

FIG. 11 is a flowchart showing a process of heating the molded product formed by the second molding device 6 by the vacuum deoiling means 7 and carrying it out from the deoiling factory 2.

[Explanation of symbols]

1 oil removal equipment 3 centrifuge 4 First molding equipment 5 First foreign matter removing means 6 Second molding device 7 Vacuum deoiling means 8 Oil / water recovery means 9,10 Deoiling furnace 11-13 receiving hopper 14, 15, 18, 19, 22, 23 Transport device 17,21 Relay hopper 24 buckets 25 molded cart 27 Bucket transport means 32 payment means 33,38,42 Transport vehicles 44 sedimentation tank 52 Second foreign matter removing means 59 Overhead traveling crane

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshio Nakamura 4976 Nomuraminami-cho, Shinnanyo-shi, Yamaguchi Nisshin Steel Co., Ltd. Shunan Steel Works (72) Inventor Ken Yoshikawa 4976 Nomuraminami-cho, Shinnanyo-shi, Yamaguchi Nisshin Steel Shunan Steel Works Co., Ltd. (56) Reference JP-A-7-90397 (JP, A) JP-A-7-126761 (JP, A) JP-A-7-118767 (JP, A) JP-A-7-126764 ( JP, A) JP-B-52-35003 (JP, B1) (58) Fields investigated (Int.Cl. ⁷ , DB name) C22B 1/00-61/00 F26B 5/04 F26B 23/00

Claims (9)

(57) [Claims] 1. A centrifuge means for centrifuging a first raw material composed of fluffy metal scraps containing oil and water to remove a part of the oil and water from the first raw material, and a centrifuging means. A first molding means for compressing and molding a metal scrap from which a part of oil and water has been removed to form a molded product, and a second fluffy metal scrap containing the oil and water and a foreign substance in the form of powder or particles. A first foreign matter removing means for vibrating the raw material to remove the foreign matter from the second raw material; and a metal scrap from which the foreign matter is removed by the first foreign matter removing means,
Second molding means for compression molding to form a molded article, and each molded article formed by the first and second molding means are placed in an airtight heating chamber and heated under reduced pressure to form each molded article. Vaporized vapor of oil and water in the heating chamber of the vacuum deoiling means is introduced to remove residual oil and water from the substance, and the vapor is cooled to recover the oil and water. A facility for removing oil and water from metal scraps, which comprises an oil / water recovery means. 2. A second foreign matter removing means is provided between the centrifugal separating means and the first molding means for removing foreign matters by blowing air to the metal scrap from which a part of oil and water has been removed by the centrifugal separating means. The equipment for removing the oil content and water content of the metal scrap according to claim 1, which is characterized by being provided. 3. A deoiling furnace equipped with each of the heating chambers is arranged in parallel in the vacuum deoiling means, and each deoiling furnace is installed in parallel on one side of the vacuum deoiling means.
The first and second molding means are arranged side by side in a second direction perpendicular to the direction, and a molded product carried out from each molding means is inserted between each molding means and the vacuum deoiling means. A plurality of molding carts, each of which is movable in the second direction, is provided on which a bucket having air permeability is mounted, and each molding means is arranged in parallel. The bucket transport means capable of charging the loaded bucket into the heating chamber and discharging the loaded bucket from the heating chamber is provided so as to be movable in the first direction. Equipment for removing oil and water. 4. A first raw material hopper into which the first raw material is charged and a second raw material hopper into which the second raw material is charged are provided, and the first raw material hopper and the centrifugal separation means are provided with a first raw material hopper. First conveying means for conveying the first raw material fed into the raw material hopper and supplying it to the centrifugal separating means is provided, and the centrifugal separating means is provided between the centrifugal separating means and the first molding means to remove oil and water. A second transport means is provided for transporting the partially removed metal scraps and supplying it to the first shaping means, and the second raw material hopper is provided between the second raw material hopper and the second shaping means. The third transporting means for transporting the metal scrap, which has been removed by the first foreign matter removing means and supplies it to the second molding means, is provided. Equipment for removing oil and water from the described metal scraps. 5. A dispensing means for tilting a bucket containing a molded product from which oil and water have been removed by the vacuum deoiling device and discharging the molded product to a transportation vehicle. Equipment for removing the oil content and water content of the metal scrap according to any one of 1 to 4. 6. A first raw material composed of fluffy metal scraps containing oil and water is centrifuged to remove a part of the oil and water from the first raw material. A second raw material made of fluffy metal scrap containing foreign matter is vibrated to remove the foreign matter from the second raw material, and metal scrap from which a part of oil and water is removed and metal scrap from which the foreign matter is removed. Is compression-molded to form a molded product, and the molded product is placed in a heating chamber and heated under reduced pressure to remove oil and water remaining in the molded product by degassing under reduced pressure and heating. A method for removing oil and water in metal scraps, characterized in that vaporized steam of oil and water from inside a room is cooled outside the furnace and recovered. 7. The metal scrap from which a part of oil and water has been removed from the first raw material to remove foreign matters,
The method for removing oil and water from metal scrap according to claim 6, which comprises compression molding. 8. A plurality of molded products formed by the compression molding are housed in a bucket having air permeability, and the bucket is loaded into the heating chamber and heated under reduced pressure. A method for removing oil and water from the metal scrap according to claim 6 or 7. 9. After charging the bucket into the heating chamber, the inside of the heating chamber is replaced with an inert gas, the inert gas is heated to convection, and the molded product in the bucket is convectively heated, and then under reduced pressure. 9. The method for removing oil and water from metal scraps according to claim 8, wherein the method is performed by heating.