JPH0338313B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a continuous production apparatus for compressed briquette coal and its operation control method, and specifically relates to a compression briquette coal for horizontally charging into a coke oven from the side. The present invention relates to a device for continuously molding and a method of operating the same.

[Prior art]

The purpose of producing coke by charging one block of compacted coal into a room furnace is to improve coke strength, expand the selection range of coking coal types, and improve productivity, as well as reduce the burden of in-furnace work and dust pollution. The aim is to eliminate this problem. In continuous production equipment for producing such compression briquettes, when tracking compression briquette coal is formed in a mold, combined with already compressed briquette coal, and taken out as continuous compression briquette coal, a fixed mold and a movable mold are used. Some molds are designed to reduce the frictional resistance applied to the compacted coal by moving a movable mold. As an example, JP-A-59-
British Patent No. 875441 describes a continuous production method and apparatus for compacted coal described in Publication No. 53588, and an apparatus for compressing powder for other purposes and uses. In addition, in a molding device that compression molds peat, when manufacturing briquette-like products, the British Patent No.
There is number 1158359. In the case of continuous manufacturing equipment and molding equipment as described above, the extrusion force when extruding the molded product can be adjusted, and products of good quality can be produced. Furthermore, we have patented a U.S. patent for a device that forms carbon by extruding it through a nozzle that combines a curved taper and a straight taper.
There are No. 3676535, No. 3284372 and No. 387644.

[Problem that the invention seeks to solve]

The raw materials used in the molding equipment, such as the peat and carbon mentioned above, contain a lot of water and a binder, which is a molding aid, and have fluidity and plasticity, so there is no difference in size or size at the exit side of the mold. The product can be easily molded by applying appropriate squeezing force, that is, frictional resistance. In this type of continuous manufacturing method and apparatus for compression molded products, the frictional resistance force in the mold is the resistance force generated between the compression molded product and the side wall of the mold, and its value varies depending on the raw material conditions. However, in the production of compacted coal for coke to be charged into a chamber furnace to which the present invention is applied, raw coal with low moisture content is used, and a forming aid such as a binder is not mixed. Coking coal has somewhat low fluidity and plasticity, and changes in the moisture content of the raw material change the frictional resistance in the mold, so in order to mold it at a constant pressure, a taper narrower in the exit direction is required. Mobility by side walls is required. However, the movable range of the taper side wall is extremely small, and even the slightest change in the movable range can cause cracks to appear in the coal mold. There are some issues that I cannot answer. Furthermore, it is difficult to continuously obtain a uniform product with a constant compacting pressure based on the strength of the coal briquettes.

The present invention has been made to solve the above-mentioned problems, and its purpose is to as accurately as possible respond to changes in frictional resistance due to fluctuations in raw material conditions when compression molding raw coal in a mold. By controlling the frictional resistance force at a constant level and molding homogeneous compression molded coal with uniform molding pressure and necessary strength, it is possible to improve coke strength, expand the selection range of coking coal types, and improve productivity. An object of the present invention is to provide a continuous production apparatus for compacted coal and a method for controlling its operation, which can improve the performance of the apparatus.

[Means for solving problems]

To explain the features of the apparatus for continuously producing compression briquettes of the present invention, as shown in FIG.
In a continuous production apparatus for compression molded coal, in which the compression molded coal 8a and the compressed molded coal 8b left in the mold opening 2M are combined and then extruded, gold is used as a resistance wall during compression molding and extrusion. Exit side 2c of mold side wall 2A
In addition, a movable mold 15 having a slightly arcuate wall surface 3a is provided, and the movable mold 15 is rotatable so that the wall surface 3a can be moved away from and approached the opposing mold side wall 2B.

To explain the features of the operation control method, in continuous manufacturing, a movable mold 15 having a slightly arcuate wall surface 3a is provided on the exit side 2c of the mold side wall 2A, which serves as a resistance wall for compression molding and extrusion. coking coal 9
The purpose is to control the separation and approach of the wall surface 3a of the movable mold 15 to the opposing mold side wall 2B so that the force acting on the press plate 6 that compresses the movable mold 15 is maintained within a predetermined range.

[Effect]

In the continuous production device 1, the raw coal 9 is pressed by the press plate 6 in the molding die 2 to be compression-molded into a compression molded coal 8a, and the raw coal 9 is left in the compression molded coal 8a and the molding mold opening 2M. The already compressed charcoal 8b is combined to form a compression charcoal 8c, which is then extruded by a press plate 6. During compression molding and extrusion, a movable mold 15 having a slightly arcuate wall surface 3a is provided on the exit side 2c of the mold side wall 2A, which serves as a resistance wall, so the movable mold 15 is rotated. By moving the wall surface 3a of the movable mold 15 away from and approaching the opposing mold side wall 2B, the force acting on the push plate 6 that compresses the charged raw coal 9 is maintained within a predetermined range. Therefore, different types of coking coal 9
The pressing force can be adjusted by the pressing plate 6 depending on the water content and the water content. As a result, homogeneous continuous compression molded coal with the necessary strength can be produced.

〔Effect of the invention〕

The present invention provides a movable mold having a slightly arc-shaped wall surface on the exit side of the mold side wall that serves as a resistance wall for compression molding and extrusion, and allows the wall surface to move away from and approach the facing mold side wall. It can be rotated like this. The rotation of the movable mold can be controlled by controlling the wall surface of the movable mold to move away from and approach the facing side wall of the mold so that the force acting on the press plate that compresses the charged raw coal is maintained within a predetermined range. Accordingly, the area of contact with the compressed coal, the taper angle, or the aperture size can be changed. Therefore, not only a change in the frictional resistance force due to the taper aperture effect but also a change in the frictional resistance force due to a change in area acts, allowing more accurate pressure control. Therefore, the frictional resistance force when compression molding raw coal in a molding die is
In order to generate the required pressing force of the pressing plate,
Can be easily changed. As a result, using different types of coking coal and coking coal with different moisture contents,
It is possible to continuously mold compacted coal with the necessary strength and homogeneous bulk density, and it is possible to improve coke strength, expand the selection range of coking coal types, and improve productivity.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, the continuous production apparatus of compression molded coal of this invention will be explained in detail based on the Example. The continuous manufacturing apparatus 1 shown in FIG. 1 and FIG. It is composed of a movable mold device 3 equipped with a rotatable movable mold 15 installed on the outlet side 2c of the coal, a raw coal hopper 4, a gate 5, and a press head which is a press plate 6.

In the case of continuous production equipment 1, continuous compression molded coal 8
A mold opening 2M is formed for compressing and accommodating the continuous compression molded coal 8c, and a bottom plate 7 for supporting the continuous compression molded coal 8c is provided on the outlet side 2c. On the other hand, a press plate 6 that can move forward and backward to press the raw coal 9 on the front side of the molding die 2 is provided, and a hydraulic cylinder 10 for moving the press plate forward and backward is attached to the press plate 6 via a press head shaft 11. The push plate 6 is the gate 5 during reduction.
It is arranged so that it is located at the end portion 5a of. For example, when the push plate 6 advances to the intermediate position 12, the raw coal 9 is formed into a tracking compression molded coal 8a, and further,
When the push plate 6 moves forward, it is combined with the already compressed briquette 8b to form continuous compression briquette 8c. When the push plate 6 moves forward to the final position 13, the continuous compression molded coal 8c is pushed out by the pushing force, and the continuous compression molded coal 8c is pushed out by the length of one block while being supported by the bottom plate 7. . When this raw coal 9 is pressed, the side wall 2 of the mold forming the opening 2M of the mold
Liners 14A and 14B attached to A and 2B, liner 14C on mold upper wall 2C, and mold bottom wall 2D
The liner 14D generates a certain frictional resistance force on the already compressed briquette 8b or the continuously compressed briquette 8c. Furthermore, the raw coal 9 is compressed and molded into the tracking compression molded coal 8a by the variable frictional resistance force exerted by the wall surface 3a of the movable mold 15. In addition, the gate 5 in the closed state forms a part of the molding die 2 during molding of the tracking compression molded coal 8a. In this example, the continuous compression molded coal 8c to be compression molded is coking coal 9 with a water content in the range of 7 to 11%.
is used to produce compacted coal with a bulk density of 1.15 wet tons/m ³ or more. The dimensions are, for example, about 400 mm in width, 6500 mm in height, and 15000 mm in length.

The continuous compression molded coal 8c shown in FIG. 3 is surrounded by the liners 14A to 14D in the molding mold opening 2M and the wall surface 3a formed in a slight arc shape of the movable mold 15 (see FIG. 4), Furthermore, the bottom plate 7 (see Figure 2)
is supported by In this example, the movable mold device 3 shown in FIG. 5 includes a movable mold 15 and a plurality of hydraulic jacks 16 (see FIG. 3, consists of 5 pieces). In this movable mold device 3, the movable mold 15 rotates around the pin shaft 17 by the expansion and contraction of the hydraulic jack 16, and the wall surface 3a of the movable mold 15 rotates around the pin shaft 17.
can move away from and approach the opposing mold side wall 2B. Furthermore, fixed frames 18 are installed at the lower and upper parts of the molding die 2 shown in FIG.
A cover member 19 is attached to the fixed frame 18, and a support frame 20 for attaching the hydraulic jack 16 is assembled on the upper part of the fixed frame 18. and,
The hydraulic jack 16 attached to the outer surface 20a of the support frame 20 can swing together with the support frame 20, which rotates about the pin shaft 21, when expanding and contracting.

The wall surface 3a of the movable mold 15 is formed into a fine circular arc 23 with a large radius of curvature connecting point B1 located near the tip surface 2a of the fixed mold 2 at point A shown in FIG.
At the position where the movable mold 15 is retracted, the tangent at point A is parallel to the center line 2N of the molding mold 2. Further, when the movable mold 3 is at the most advanced position indicated by the two-dot chain line, the tangent at point B1 is also determined to be parallel to the center line 2N. By the way, at the most advanced position of movable mold 3,
Distance X1 between point B1 and liner 14A on mold side 2A
In this example, the total distance of the distance X2 between point B2 and the liner 14A when the movable mold 3 is retracted is selected within a range of 5% of the width of 400 mm of the continuous compression molded coal 8c. As an example, 6 mm, which is 1.5%, is adopted, and the length L is about 1000 mm. In addition, the total distance of X1 and X2 may be kept unchanged, and instead of the mold side wall 2A, the movable mold 15 may be provided over its entire length. When the movable mold 15 approaches and moves away from the mold side wall 2B,
As shown in FIG. 7, the final contact point C1 (B in FIG.
Point 1) gradually approaches point A as the movable mold 15 retreats, and point A becomes the final contact point at the time of retreat.
Therefore, the area in which the wall surface 3a of the movable mold 15 contacts the briquette coal varies significantly depending on the rotational position, while the length of the circular arc indicated by the thick solid line varies steplessly. θ also decreases continuously as the vehicle retreats, and increases as the vehicle advances. In this way, for the wall surface 3a of the movable mold 15 having a micro-arc 23, there is a significant difference in the contact area and taper angle at the rotating position, compared to when a movable mold with a flat wall surface rotates. Therefore, there is an advantage that the pressing force of the press plate 6 can be easily controlled by utilizing a large amount of change in the frictional resistance surface generated by a slight rotation of the movable mold 15. Note that the microcircular arc 23 may be a complete circular arc in some cases, but it is not limited to this meaning; it may be anything that roughly forms a circular arc, such as a series of curved straight lines or an elliptical arc.
In any case, the curvature is so small that it resembles a microcircular arc.

As the movable mold 15 advances and retreats, the molding mold 2
The entire frictional resistance force is varied from the entire frictional resistance surface of the movable mold 15 which changes between zero and maximum, and it is used for forming the tracking compacted coal 8a. . For example, when the moisture content of the raw coal 9 is 7%, the movable mold 15 is retracted to reduce the total frictional resistance, and when the moisture content is 11%, it is moved forward to increase the total frictional resistance. This makes it possible to maintain a constant resistance force. Note that the circular arc from point B1 of the movable mold 15 to the tip 3b shown in FIG. 5 is a relief portion where the fine circular arc 23 is extended, and suppresses rapid expansion immediately after leaving the compacted coal. In addition, the movable mold 15
When the guide member 15a rotates about the pin shaft 17, a rotation support guide 24 shown in FIG. 5 is provided to ensure smooth rotation of the guide member 15a.

In this example, the movable mold device 3 having the movable mold 15 is provided on the exit side 2c of the mold side surface 2A, but it may be provided on the mold side surface 2B side or both sides. In the latter case, the above-mentioned X1 and X2
The shape of the wall surface 3a may be determined by allocating distances between the two.

According to the apparatus for continuously producing compression briquettes configured as described above, the operation is controlled in the following manner, and compression briquettes are formed.

The gate 5 of the raw coal hopper 4 in the continuous production apparatus 1 shown in FIG.
Raw coal 9 with a water content of 11%, for example, is put into the gap of the molding die 2 formed between the molding die 2 and the molding die 2.b. continue,
When the hydraulic cylinder 10 is extended, the press plate 6 advances in the direction of arrow 25 via the press head shaft 11 and presses the raw coal 9. At that time, the compressed charcoal 8
b is the liner 14 forming the mold opening 2M;
It is held by the frictional resistance generated by contact with A to 14D. On the other hand, the hydraulic jack 16 shown in FIG. 5 is extended, and the movable mold 15 rotates about the pin shaft 17 in the direction of arrow 26 and moves to the position shown by the two-dot chain line, so that the wall surface 3a faces approach the side wall 2B of the mold. Therefore, the movable mold 15
The frictional resistance force generated at the press plate 6 becomes maximum, and the total frictional resistance force can maintain a pressing force of 100 kg/cm 2 suitable for compression molding raw coal 9 with a water content of 11%, for example, a compression surface pressure of 100 kg/cm ² . to act on.

Next, when compression molding the raw coal 9 with a water content of 7%, the movable mold 15 shown in FIG. Make them retreat further. Movable mold 15
Since the frictional resistance force generated in the molding die 2 becomes zero, the continuous compression compacted coal 8c is held only by the frictional resistance force generated in the molding die 2. Therefore, the pressing plate 6 presses the raw coal 9 with a small amount of water at an appropriate pressing force, for example, a compression surface pressure of 100.
By compression molding at Kg/cm ² , a tracked compression molded coal 8a having the required strength and the desired bulk density of 1.15 wet tons/m ³ or more is formed while preventing the occurrence of cracks. By repeating operations based on such control, homogeneous continuous compression molded coal 8c can be smoothly produced even if raw coal 9 with different water content is input.

In addition, in the above-mentioned control, the moisture content of the raw coal 9 is measured, the position of the movable mold 15 is set for each press, and when compression molding is finished, the movable mold 15 is evacuated to reduce the press-off pressure. It is also possible to control the Also, during one pressing operation, the push plate 6
Detects the pressing force and produces homogeneous tracking compression molded coal 8
In order to change the pressing force necessary for molding a, the movable mold 15 may be controlled to move forward or backward. In short, we have adopted many operating modes that can improve coke strength, expand the selection range of coking coal types, and improve productivity in response to different types of coking coal9 and water content. As a result, it becomes possible to produce homogeneous continuous compression molded coal 8c.

[Brief explanation of the drawing]

FIG. 1 is a planar vertical sectional view of the continuous production apparatus for compression molded coal of the present invention, FIG. 2 is a view taken along the - line in FIG. 1, and FIG. 3 is a view taken along the - line in FIG. 2. Figure 4 is a sectional view taken along the - line in Figure 3, Figure 5 is an enlarged view of the movable mold device, Figure 6 is an explanatory diagram of the shape of the wall surface of the movable mold, and Figure 7 is movement of the movable mold. It is a state explanatory diagram. 1... Continuous manufacturing equipment, 2... Molding mold, 2A,
2B...Mold side wall, 2M...Molding mold opening, 2
c...Exit side, 3a...Wall surface, 6...Press plate (press head), 8a, 8c...Compression molded coal, 8b...
Pre-compressed molded coal, 9... Raw coal, 15... Movable mold.

Claims (1)

[Claims] 1. Compression molding in which raw coal is molded into compression molded coal in a forming mold, and the compression molded coal and already compressed molded coal left in the opening of the mold are combined and then extruded. In continuous charcoal production equipment, a movable mold with a slightly arcuate wall surface is provided on the exit side of the mold side wall that serves as a resistance wall for compression molding and extrusion, and the wall surface is moved away from and approached the facing mold side wall. A continuous production device for compressed briquette coal, characterized in that it is rotatable so that it can be rotated. 2. In the continuous production of compressed briquette coal, in which coking coal is formed into compression briquette coal in a molding die, and the compressed briquette coal and the compressed briquette coal left in the opening of the shaping die are combined and then extruded, compression A movable mold with a slightly arc-shaped wall surface is provided on the exit side of the mold side wall that serves as a resistance wall for molding and extrusion, and the force acting on the press plate that compresses the raw coal that is introduced is maintained within a predetermined range. An operation control method in a continuous production apparatus for compacted coal, characterized in that the wall surface of the movable mold is controlled to move away from and approach the facing side wall of the mold.