JP3549998B2 - Method and apparatus for pumping irregular-shaped refractories - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and an apparatus for pumping irregular-shaped refractories used for gutter materials and the like, and more particularly to a method for pumping irregular-shaped refractories having high viscosity.
[0002]
[Prior art]
A refractory is installed on the inner surface of a blast furnace tapping gutter for flowing hot molten pig iron from a blast furnace. In this blast furnace tapping gutter, high-temperature molten pig iron or slag wears the refractory applied to the inner surface or causes chemical deterioration. Also, repetition of cooling due to switching of tap holes deteriorates the refractory applied to the inner surface.
[0003]
For this reason, it is necessary to repair the deteriorated refractory on the inner surface of the blast furnace tapping gutter, and dismantle and remove the deteriorated refractory, and construct a new refractory.
[0004]
Conventionally, in order to construct a new refractory on the inner surface of a blast furnace tapping gutter, an irregular refractory in which crushed debris such as bricks are mixed as aggregate is generated, and the irregular refractory is pumped by a pressure pump. Was.
The reason for using crushed debris such as bricks as aggregates is to reduce costs by using waste materials.
In addition, the pressure feeding route for the irregular refractories is configured by connecting a plurality of metal pipes with joints.
[0005]
[Problems to be solved by the invention]
However, the conventional pumping apparatus and method of the conventional refractory have the following problems.
[0006]
First, since the pumping route is constituted by metal pipes connected by joints, there is a problem that the pumping route is restricted.
[0007]
Secondly, when an aggregate such as brick debris is mixed into the irregular-shaped refractory, there is a problem that a factor of unstable feeding occurs.
That is, the aggregate made of crushed debris such as bricks easily absorbs moisture, so that the viscosity of the amorphous refractory increases and the possibility of clogging of the piping increases.
In addition, it has various angular shapes for crushing, and it is easy to cause blockage of the pipe. Moreover, it is necessary to increase the diameter of the aggregate in order to reduce the production cost of the aggregate. For this reason, although the means of pressure feeding is a convenient supply means, there was an impression that it was difficult to use waste materials.
Further, if the irregular-shaped refractory mixed with the aggregate is kneaded with a mixer, the aggregate segregates and falls, and the aggregate precedes the inside of the pipe when the irregular-shaped refractory is pumped.
Further, if water is added to reduce the viscosity of the amorphous refractory, the aggregates are separated, rather than the pipes, and the pipes are easily blocked.
For this reason, it is necessary to adjust the water content in the setting of the viscosity of the amorphous refractory to a minimum and a sufficient amount of water within a range where the piping is not blocked. That is, when the water content is increased, the porosity is increased, and the construction quality is deteriorated. Therefore, the water control has been an important issue.
For example, it is necessary to adjust the amount of water added at the time of kneading and to adjust the promotion of coagulation according to the temperature, humidity, or material brand. In addition, the viscosity of amorphous refractories fluctuates significantly due to changes in seasons, setting of coagulation time with a coagulation accelerator, and switching from refractories for metals to refractories for slag, and the risk of clogging of pipes may increase. I'll keep it on.
In addition, under the condition that the aggregate is mixed, segregation and separation of the aggregate affect the blockage of the pipe.
[0008]
Third, in the work of pumping irregular-shaped refractories, a dedicated worker who operates the pump and a worker who positions the tip of the pipe are required, and there is a problem that labor saving cannot be achieved.
[0009]
Therefore, the present invention has been proposed in view of the above-mentioned problems of the conventional technology, and has the following objects.
[0010]
The invention according to claim 1 provides a pumping method capable of stably pumping an amorphous refractory without causing blockage of the piping by pre-lubricating the inside of the pipe for pumping the amorphous refractory. The purpose is to do.
[0011]
According to the second aspect of the invention, in addition to the object of the first aspect of the invention, a lubricant can be easily generated by using an irregular refractory to which no aggregate is added as a lubricant. An object is to provide a pumping method.
[0012]
According to the third aspect of the present invention, in addition to the object of the first or second aspect of the present invention, it is possible to prevent the occurrence of blockage of the piping beforehand and to more stably feed the irregular-shaped refractory. It is an object of the present invention to provide a pumping method capable of performing the following.
[0013]
The invention according to claim 4 is to provide a pumping device which is not restricted by a pumping route by using a flexible pumping hose which is preliminarily lubricated in the pipe by a specific method or configuration in the middle of the pumping pipe. With the goal.
[0014]
According to the invention of claim 5, in addition to the object of the invention of claim 4, it is possible to prevent the occurrence of clogging of the pipe beforehand, and to stably pump the irregular-shaped refractory, It is an object of the present invention to provide a pumping device capable of saving labor.
[0015]
[Means for Solving the Problems]
The present invention has been made to achieve the above-mentioned object, and its contents will be described below.
[0016]
The invention according to claim 1 is a method for pumping an irregular-shaped refractory mixed with an aggregate by a pressure-feeding pump through a flexible pressure-feeding hose. Prior to the refractory, it is filled with liquid and lubricant.
[0017]
Then, a filling member having an outer diameter larger than the inner diameter of the pumping hose is interposed at the boundary between the liquid and the lubricant filled in the pumping hose and the boundary between the lubricant and the irregular refractory.
[0018]
In this way, after the inside of the pressure-feeding hose is lubricated with the liquid and the lubricant in advance, the work of pressure-feeding the irregular-shaped refractory is performed.
[0019]
Specifically, in this pumping method, for example, an amorphous refractory containing less than 50% by weight of an aggregate is used.
[0020]
According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, an irregular refractory containing no aggregate is used as a lubricant.
[0021]
According to a third aspect of the present invention, in addition to the configuration of the first or second aspect of the present invention, the pump can be started and stopped by remote control, and the operation speed can be finely adjusted. A driving pressure sensor for measuring the driving pressure is provided.
[0022]
When the driving pressure sensor detects a pressure equal to or higher than a predetermined value, a warning is issued to the operator, and after performing the reverse feeding operation of the pressure feeding pump for a predetermined time, the irregularity of the irregular shaped refractory is set at a preset slow speed. Resume pumping work.
[0023]
According to a fourth aspect of the present invention, there is provided a pressure-feeding device for feeding an irregular-shaped refractory mixed with an aggregate through a pressure-feeding pipe by a pressure-feeding pump. Using a hose, a liquid and a lubricant are filled in the pressure-feeding hose prior to the irregular-shaped refractory, and a boundary between the filled liquid and the lubricant, and a lubricant and the irregular-shaped refractory are filled in the pressure-feeding hose. With a filling member having an outer diameter larger than the inner diameter of the pressure-feeding hose at those boundaries, and lubricating the inside of the pressure-feeding hose with a liquid and a lubricant in advance, and then feeding the irregular-shaped refractory. It has a function to perform work .
[0024]
Specifically, in this pumping device, for example, an amorphous refractory containing less than 50% by weight of an aggregate is used.
[0025]
According to a fifth aspect of the present invention, in addition to the configuration of the fourth aspect of the present invention, the pump includes a driving pressure sensor for measuring a driving pressure.
[0026]
In addition, a pressure indicator connected to the driving pressure sensor is provided at a position recognizable by the operator, and a warning device that generates a warning when the driving pressure sensor detects a predetermined pressure or more.
[0027]
Further, a speed fine adjustment device is provided at a position operable by the operator to finely adjust the speed of pumping the irregular-shaped refractory by the pump.
[0028]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.
1 to 3 show an embodiment of a device for feeding irregular shaped refractories according to the present invention. FIG. 1 is a side view of the device, FIG. 2 is a plan view of the device, and FIG. And side views of a pressure feed pipe near the pressure feed pump.
4A and 4B show an embodiment of a filling member to be inserted into the pressure-feeding pipe. FIG. 4A shows a sponge, and FIG. 4B shows a pig.
FIG. 5 is a longitudinal sectional view of a short tube for water pouring.
[0029]
(Pumping device)
As shown in FIGS. 1 and 2, the amorphous refractory pumping device 10 according to the present invention is connected to a self-propelled manipulator 20 at the rear thereof, and is used for kneading an aggregate. The receiving hopper 30, the pump 40 for pumping the irregular-shaped refractory received from the hopper 30, the pumping pipe 50 connected to the pump 40, and the pump carriage 60 on which the hopper 30 and the pump 40 are mounted. Have.
[0030]
(manipulator)
As shown in FIGS. 1 and 2, the manipulator 20 has a driver's cab 22 rotatably provided above a self-propelled trolley 21 and an arm 23 having a plurality of joints in front of the driver's cab 22. The arm 23 is rotatably mounted, and the distal end of the arm 23 faces the distal end of the pressure feed pipe 50, and the vibrator 70 is attached.
[0031]
(hopper)
The above-mentioned hopper 30 is a device for receiving an irregular refractory in which an aggregate has been kneaded with a mixer (not shown) in advance, and although not shown in detail, for example, is provided with a stirrer that rotates forward and backward by a hydraulic motor. .
[0032]
In addition, as the aggregate to be mixed into the irregular-shaped refractory, brick waste or the like crushed to an average particle size of about 30 mm is used. In addition, the amorphous refractories contain less than 50% of this aggregate by weight, and the slump value is about 20 cm.
[0033]
(Pressure pump)
Although not shown in detail, the above-described pressure feed pump 40 uses, for example, a hydraulic two-piston pump. The pump 40 can be driven in the forward and reverse directions to pump the irregular shaped refractory in the forward and reverse directions and finely adjust the pumping speed.
Further, the pressure pump 40 is provided with a cylinder pressure sensor 41 as a driving pressure sensor for measuring a driving pressure of a cylinder (not shown).
[0034]
In the cab 22 of the manipulator 20, a pump start / stop device 80 for remotely operating the pump 40 is provided.
[0035]
The pump start / stop device 80 is provided with a pressure indicator 81 connected to the cylinder pressure sensor 41, and a warning device 82 for generating a warning when the cylinder pressure sensor 41 detects a predetermined pressure or more. The warning device 82 described above includes, for example, a buzzer, a warning lamp, and the like.
[0036]
Therefore, the operator who operates the manipulator 20 can recognize the driving pressure of the pressure pump 40 while constructing the amorphous refractory in the blast furnace tapping gutter.
[0037]
Further, the pump start / stop device 80 is provided with a speed fine adjustment device 83 for finely adjusting the speed of the pressure feed pump 40. Therefore, the operator of the manipulator 20 can finely adjust the speed of the pumping pump 40, and does not require an operator to operate the pumping pipe 50 in addition to the operator.
[0038]
Note that the speed adjustment of the pressure feed pump 40 and the switching of the drive in the forward / reverse direction may be performed based on an operation of an operator, or may be automatically performed based on control of a control device including a microcomputer or the like.
[0039]
(Pressurized piping)
As shown in FIGS. 1 and 2, the above-described pressure feed pipe 50 is for guiding the irregular-shaped refractory received by the hopper 30 to the distal end of the arm 23 of the manipulator 20, and is composed of a to i portions. ing.
A part or all of the pressure feed pipe 50 is constituted by a flexible pressure feed hose.
[0040]
(Method of pumping irregular shaped refractories)
In the irregular-shaped refractory pumping apparatus 10 having the above-described configuration, the irregular-shaped refractory mixed with the aggregate in advance and kneaded by the mixer is received by the hopper 30, and is driven by the pressure pump 40 so that the pressure inside the pressure pipe 50 is reduced. And is installed in the blast furnace tapping gutter from the tip of the pressure feed pipe 50i located at the tip of the arm 23. At this time, the vibrator 70 is inserted into the constructed irregular-shaped refractory, and the irregular-shaped refractory is compacted.
[0041]
(Pre-lubrication work of the pressure feed pipe)
When the irregular-shaped refractory is pumped by the above-described pumping device 10, the lubrication work of the pumping pipe 50 is performed in advance.
[0042]
In this lubrication work, first, it is confirmed that the filling member has been inserted into the pressure feeding pipe 50a.
[0043]
As shown in FIG. 4A, the filling member is formed of a substantially cylindrical sponge 90, and has a maximum outer diameter slightly larger than the inner diameter of each of the pressure feeding pipes 50a to 50i.
[0044]
Note that the filling member is not limited to the sponge 90 described above, and has a flexibility, a range slightly larger than the inner diameter of the pressure feeding pipes 50a to 50i, and a range in which the lubricating layer formed in the pressure feeding pipes a to i is not peeled off. Rubber balls or the like may be used as long as they have the above outer diameter.
[0045]
While confirming the insertion of the filling member, it is confirmed that water as a lubricating liquid remains in the pressure feeding pipes 50h and 50g. Here, when no water remains in the pressure feed pipes 50h and 50g, water is injected from the tip of the pressure feed pipe 50i.
The reason why water is injected into the pressure feeding pipe 50i is to avoid blockage of the pipe due to dehydration at the time of feeding the lubricant.
[0046]
Next, mortar, which is a lubricant, is injected from the downstream side of the pressure feeding pipe 50d, and a sponge 90, which is a filling member, is inserted into the outlet side of the pressure feeding pipe 50d.
[0047]
In this embodiment, the injection of the mortar and the insertion of the sponge 90 are performed by removing the pressure-feeding pipe 50e. However, a mechanism capable of injecting the mortar and inserting the sponge 90 without removing the pressure-feeding pipe 50e. May be provided.
Also, the sponge 90 inserted into the pressure feeding pipe 50d is slightly smaller than the sponge 90 inserted into the pressure feeding pipe 50a.
[0048]
Thus, the mortar is filled in the pressure-feeding pipes 50a to 50d, and the sponge 90 is interposed before and after the mortar.
Although some air may remain in the pressure feed pipe 50, the amount of the remaining air is small, and the lubricant to be sent out is mortar and has good fluidity. Does not interfere with the pumping of
[0049]
In this state, since the front and rear of the mortar are sandwiched between the filling members such as the sponge 90, even at the falling portions of the pressure feeding pipes 50a to 50e, it is necessary to reliably lubricate the entire inner surface of the pressure feeding pipes 50a to 50e. Can be.
In addition, since the remaining water supplies a sufficient amount of water after the pressure feeding pipe 50f, the entire inner surface of the pressure feeding pipes 50f to 50i can be reliably lubricated.
[0050]
(Pumping work for irregular refractories)
After the above-mentioned pre-lubrication work of the pressure feeding pipe 50 is completed, the irregular-shaped refractory is put into the hopper 30, and the pressure-feeding pump 40 is driven to perform the pressure-feeding operation of the irregular-shaped refractory.
[0051]
Then, the mortar, which is a lubricant, is discharged into a bucket or the like until the filling member such as the sponge 90 is discharged from the distal end portion of the pressure feeding pipe 50i. After the filling member is discharged, the mortar is discharged into the blast furnace tapping gutter. Pour irregular shaped refractories and perform construction work.
[0052]
(Work to avoid pipe blockage)
If a blockage is likely to occur in the pressure-feeding pipe 50 during the above-described pressure-feeding operation of the irregular-shaped refractory, a blockage avoiding operation is performed.
[0053]
In this blockage avoidance operation, first, when the cylinder pressure sensor 41 detects a pressure equal to or higher than a predetermined value, a warning is issued to the operator by a warning device 82. The warning by the warning device 82 is performed by, for example, generating a warning sound by a buzzer or turning on or blinking a warning lamp.
[0054]
Then, the pressure-feeding pump 40 is operated in the reverse direction for a predetermined time to pump the irregular-shaped refractory in the reverse direction, and then resumes the operation of pumping the irregular-shaped refractory at a preset slow speed. After that, if the cylinder pressure sensor 41 does not detect a pressure equal to or higher than a predetermined value, the irregular refractory is pumped at a normal speed.
[0055]
In the present embodiment, this blockage avoidance work is automatically performed based on the control of a control device such as a microcomputer.
[0056]
It should be noted that the blockage avoiding work may not be performed automatically, but may be performed manually based on the operation of the pump start / stop device 80 by the operator.
[0057]
In this manual operation, when the operator monitors the pressure indicator 81 and notices an abnormal pressure, or when the alert device 82 notices an abnormal pressure, the operator operates the pump start / stop device 80 to start the pump 40. A reverse reciprocating operation is performed to reciprocate the irregular shaped refractory in a reverse direction.
[0058]
Next, the operator operates the speed fine adjustment device 83 to restart the work of pumping the amorphous refractory at a preset slow speed.
Thereafter, if the cylinder pressure sensor does not detect a pressure equal to or higher than a predetermined value, the operator operates the speed fine adjustment device 83 to perform the irregular refractory pumping operation at a normal speed.
[0059]
By such an operation, it is possible to prevent the blockage of the pressure feed pipe 50 from occurring.
[0060]
(Washing work of the pressure pipe)
After the above-described work of applying the irregular-shaped refractory is completed, the pressure pipe 50 is washed. In the cleaning operation of the pressure feeding pipe 50, the sponge 90 and the pig 100 shown in FIGS. 4A and 4B are used as filling members.
[0061]
In the cleaning operation of the pressure feed pipe 50, first, the pressure feed pipe 50a is removed, and a short pipe 110 for watering is connected to the upstream side of the pressure feed pipe 50b.
As shown in FIG. 5, a sponge 90 and a pig 100 as filling members are inserted in this order from the upstream side into the short tube 110 for water pouring.
[0062]
Next, a water hose (not shown) is connected to the upstream side of the short pipe 110 for water pouring, and the pressure pump 40 is driven to feed water into the pressure pipe 50.
The first material discharged from the tip of the feed pipe 50i is poured into the blast furnace tapping gutter, and when the sponge 90 as a filling member approaches the outlet side of the feed pipe 50, the irregular shaped refractory to be fed is bucketed. Discharge inside.
[0063]
After the discharge of the irregular-shaped refractory in the pressure feed pipe 50 is completed, the inside of the hopper 30 is washed with water.
[0064]
Next, the sponge 90 and the pig 100, which are filling members, are inserted into the pressure feeding pipe 50a, and the operation is completed in preparation for the pre-lubrication action of the pressure feeding pipe 50.
At this time, the downstream side of the pressure feed pipe 50f is filled with water as a lubricating liquid.
[0065]
【The invention's effect】
Since the present invention has the above-described configuration, it has the following effects. According to the first aspect of the present invention, the inside of the pipe for feeding the irregular-shaped refractory is lubricated in advance with a lubricant.
Therefore, it is possible to stably pump the irregular-shaped refractory without blocking the pressure feed pipe.
[0066]
The invention according to claim 2 has the following effects in addition to the effects of the invention described in claim 1.
That is, by using an irregular refractory to which no aggregate is added as a lubricant, the lubricant can be easily generated. Further, it is possible to save the trouble of discharging the mortar so that the mortar does not mix into the gutter material.
[0067]
The invention according to claim 3 has the following effects in addition to the effects of the invention described in claim 1 or 2.
That is, it is possible to prevent the occurrence of blockage of the piping beforehand, and to more stably feed the irregular-shaped refractory.
[0068]
According to the fourth aspect of the invention, a flexible pressure-feeding hose in which the inside of the pipe is lubricated in advance by a specific method or configuration is used in the middle of the pipe . Therefore, there is no restriction on the pumping route.
[0069]
The invention of claim 5 has the following effect in addition to the effect of the invention of claim 4 described above.
In other words, by displaying the pumping pressure and warning the pressure abnormality, it is possible to prevent the occurrence of blockage of the pipe beforehand, and to stably pump the irregular-shaped refractory, and to save labor. be able to.
[Brief description of the drawings]
FIG. 1 is a side view of a device for feeding irregular shaped refractories.
FIG. 2 is a plan view of a device for feeding irregular shaped refractories.
FIG. 3 is a side view of a pumping hose near the pumping pump.
4A and 4B are explanatory views of a filling member. FIG. 4A is a perspective view of a sponge, and FIG. 4B is a perspective view of a pig.
FIG. 5 is a longitudinal sectional view of a short tube for water pouring.
[Explanation of symbols]
Reference Signs List 10 pumping device 20 manipulator 21 self-propelled trolley 22 driver's seat 23 arm 30 hopper 40 pumping pump 41 cylinder pressure gauge 50 pumping piping 60 pump trolley 70 vibrator 80 pump start / stop device 81 pressure indicator 82 warning device 83 speed fine adjustment device 90 Sponge 100 pig 110 short tube

Claims (5)

In a method of pumping an irregular-shaped refractory mixed with an aggregate by a pressure-feeding pump through a flexible pressure-feeding hose,
In the pumping hose, fill the liquid and lubricant before the refractory,
A filling member having an outer diameter larger than the inner diameter of the pumping hose is interposed at the boundary between the liquid and the lubricant filled in the pumping hose and the boundary between the lubricant and the irregular-shaped refractory, and the liquid and the lubrication are previously performed. A method for pressure-feeding irregular-shaped refractories, wherein the pressure-feeding operation of irregular-shaped refractories is performed after the inside of the pressure-feeding hose is lubricated with an agent. As a lubricant
2. The method for pumping an amorphous refractory according to claim 1, wherein an amorphous refractory containing no aggregate is used. The pump is
It can be started and stopped by remote control, and the operation speed can be finely adjusted, and includes a driving pressure sensor that measures the driving pressure,
When the drive pressure sensor detects a pressure equal to or higher than a predetermined value, a warning is issued to the operator,
The pumping operation of the irregular-shaped refractory according to claim 1 or 2, wherein the pumping operation of the irregular-shaped refractory is restarted at a preset slow speed after the reverse feed operation of the pressure-feeding pump is performed for a predetermined time. Method. A pumping device for pumping irregular-shaped refractory mixed with aggregates by a pumping pump through a pumping pipe,
For the pressure feed pipe, a flexible pressure feed hose is used , and in the pressure feed hose, a liquid and a lubricant are filled prior to the amorphous refractory, and the filled liquid and the lubricant are filled in the pressure feed hose. And a boundary between the lubricant and the irregular-shaped refractory, and a filling member having an outer diameter larger than the inner diameter of the pressure-feeding hose is interposed at those boundaries, and the inside of the pressure-feeding hose is previously filled with a liquid and a lubricant. An irregular -shaped refractory pumping device having a function of performing an operation of pumping an irregular-shaped refractory after lubricating the material. For the pressure pump,
Equipped with a driving pressure sensor that measures the driving pressure,
In a position that the operator can recognize,
A pressure indicator connected to the drive pressure sensor,
A warning device that generates a warning when the driving pressure sensor detects a pressure equal to or higher than a predetermined value,
In a position where the operator can operate,
5. The apparatus for feeding irregular shaped refractories according to claim 4, further comprising a speed fine adjustment device for finely adjusting the speed of feeding the irregular shaped refractories by the pressure pump.

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