JPH0212517B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for continuously producing compacted coal having a bulk density of 1.0 wet tons/m ³ or more.

The purpose of producing coke by charging a block of compacted coal into a room furnace is to improve coke strength, expand the selection range of coking coal types, improve productivity, and eliminate work on the furnace and dust pollution. .

Regarding the continuous production method of compacted coal, the method already proposed in Japanese Patent Application No. 56-56986,
In other words, the compressed briquette coal that has already been compression-molded is left in the opening of the forming die, and the subsequent compression-molding obtained by compression-molding the raw coal that has been newly charged into the forming die. Bulk density by combining charcoal
There is a method of producing briquette coal of 1.0 wet ton/m ³ or more and continuously producing an endless amount of compressed briquette coal by sequentially repeating this process.

Briefly, an apparatus for carrying out this manufacturing method is comprised of a forming die 1, a raw coal hopper 2, a gate 3, a push plate 4, and a bottom plate 7 shown in FIG. The manufacturing procedure begins with continuous compression molded coal 6 as shown in Figure a.
c is taken out into the mold opening 1M, the push plate 4 is moved to the 1N position in the mold 1, and the raw coal 5 is loaded into the mold 1 through the raw coal hopper 2 and the gate 3. Enter. Then, the gate 3 forming a part of the molding die is closed, and one end of the continuously compressed molded coal 6c is supported by the bottom plate 7. In addition, this continuous compression molded coal 6c
serves as compressed charcoal 6a in the next step. Next, as shown in FIG. 4B, when the push plate 4 is moved by, for example, a drive cylinder (not shown), the raw coal 5 in the molding die 1 is compressed and becomes a tracked and compacted coal 6b. At this time, the tracking compacted coal 6b has the same bulk density as the compressed compacted coal 6a and is combined into the compacted compacted coal 6a. Finally, as shown in Figure c, the combined continuous compression molded coal 6c is extruded into the mold opening 1M by the press plate 4, completing one cycle of the molding process. Therefore, by repeatedly and continuously performing this cycle, compressed briquette coal 6 can be continuously produced.

In the above conventional method, the frictional force with the inner surface of the mold when extruding the compressed briquette acts as a supporting force when compressing the raw coal that is newly charged into the mold. Therefore, the newly charged coking coal is compressed to the maximum extent and produced as tracked compacted coal, which at the same time has the same bulk density as the already compressed compacted coal and can be combined.

However, when extruding the combined continuous compression molded coal, it is necessary to continue pressurizing it with an extrusion force that exceeds the frictional force between it and the inner surface of the molding die, which has the disadvantage of requiring a large amount of pressurizing energy. be.

The present invention has been made to solve the above-mentioned problems, and after forming raw coal into track-compressed compacted coal and combining it with already compressed compacted coal, the continuously compacted compacted coal is taken out into the opening of the forming mold. It is an object of the present invention to provide a method for continuously producing compacted coal and an apparatus for continuously producing the same, which can avoid wasteful consumption of large amounts of energy.

The feature is that in the process of continuously extruding compacted coal and taking it out from the opening of the forming die, by moving the movable die of the fixed die and movable die that make up the forming die, This is a continuous production method for compression molded coal that reduces the side pressure applied to the compression molded coal and reduces the extrusion frictional force. It has a moving means for moving the mold, and pushes the push plate forward to mold the tracking compression molded coal within the molding die, and also pushes the push plate further in the compression direction to form the continuous compression molded coal into the opening of the molding mold. The present invention provides an apparatus for continuous production of compression molded coal in which the movable mold can be moved by the moving means during extrusion from the section.

By using such a continuous production method of compression briquette coal and its equipment, it is possible to reduce the frictional force with the molding die when extruding the continuous compression briquette coal from the molding die, thereby reducing the production of compression briquette coal. The energy required for this can be reduced.

Hereinafter, the present invention will be explained based on examples thereof. FIG. 2 shows an apparatus for continuously producing compacted compacted coal. Molding mold 1, 1a, 1b, 1c, 1
d, a raw coal hopper 2, a gate 3, a push plate 4, and a bottom plate 7. In the figure a, after the continuous compression molded coal 6c has been taken out into the mold opening 1M, the press plate 4 is inserted into the mold. Move inside mold 1 to 1N position and add coking coal 5
After charging the raw coal into the molding mold 1 through the raw coal hopper 2 and the open gate 3, the gate 3 forming a part of the molding mold was closed, and the continuously compressed molded coal 6c was supported by the bottom plate 7. Indicates the condition. Figure b shows a state in which the press plate 4 compresses the raw coal 5 in the molding die 1 using, for example, a drive cylinder (not shown) to form a tracking compression molded coal 6b, which is combined with the already compressed molded coal 6a.
Figure c shows tracked compacted coal 6b and already compressed compacted coal 6a.
This shows the state immediately after the continuous compression molded coal 6c, in which the two are combined, is extruded by the press plate 4 to the exit part of the molding die.

That is, the compressed molded coal 6a remains in the opening of the molding die 1 supported by the bottom plate 7, and the raw coal provided in the upper part 1a of the molding mold 1 is in the space between the press plate 4 and the compressed molded coal 6a. Coking coal 5 is charged from the hopper 2 with the gate 3 open. The gate 3 forming a part of the molding die 1a is closed, and the raw coal 5 is compressed in the direction of the compressed molded coal 6a using the push plate 4 to form the tracked compressed molded coal 6b and combined with the compressed molded coal 6a. . When this becomes continuous compression molded coal 6c, if the push plate 4 is further pushed toward the mold opening,
The moment the extrusion force exceeds the frictional force between the continuous compression compacted coal 6c and the inner surface of the molding die 1, the continuous compression compacted coal 6
Extrusion of a is started. At this time, for example, move the movable molds 1a and 1c with arrow R as shown in FIG.
By moving the continuous compression molded coal 6c away from the continuous compression molded coal 6c, the pressure generated on the inner surface of the mold 1 is released, and the resistance force generated during extrusion is due to the weight of the continuous compression molded coal 6c and the fixed mold 1d. The only friction force generated on the contact surface is Therefore, the required extrusion force can be reduced to about several percent of the force required before the pressure is released. In addition, one of the movable molds 1a and 1c
Only c may be moved.

In order to continue the series of molding processes,
The press plate 4 is placed in the mold 1 as shown in the figure a.
Retract to position. Pre-compressed charcoal 6a and press plate 4
The raw coal 5 is charged again into the space newly created in the molding die 1 between the raw coal hopper 2 and the gate 3 in the open state, and the gate 3 is closed and the press plate 4 is used to press the raw coal 5 before compression starts. Compressed coal 6a and movable molds 1a, 1
c is pressed into close contact with the raw coal 5 to the compressed briquette 6a.
When the charcoal is brought into surface contact and further compressed, frictional force is already ensured, so the tracking compression briquette 6b shown in FIG. The result is continuous compression molded coal 6c as shown in Figure c. Therefore, if the movable molds 1a and 1c are separated from the continuous compression molded coal 6c immediately before pushing the push plate 4 toward the mold opening 1M, the continuous compression molded coal 6c can be extruded with less extrusion force. can.

By repeating the above steps in a series of forming steps, compressed and formed coal 6 is continuously produced. In this case, if the coking coal 5 is brought into surface contact with the compressed briquette 6a as shown in Figure a, and the extrusion force is further controlled at the time of compression, the tracking compressed briquette 6b in Figure 1B will be the same as the compressed briquette 6a. It has the same uniform bulk density, and therefore homogeneous continuous compression molded coal 6c can be produced.

In addition, FIGS. 3a and 3b are diagrams showing the relationship between the moving distance L of the press plate 4 and the extrusion force F in one cycle of continuous molding of compression molded coal, and FIG. shows a case in which all of the molds are fixed, and FIG. In the figure, α is the compression process, β
1, β2 indicates the extrusion process, and γ indicates the return process of the press plate 4. According to this, α, β1, γ and α, β
The area of the hatched part surrounded by the lines 2 and γ indicates the total amount of work required for the tracking compression molded coal 6b that can be produced in one cycle and the amount of work required to extrude the continuous compression molded coal 6c. However, as a mold, the compressed cross section
This is the case when compression molded coal was produced using a press with a compression capacity of 1000 tons using a piece measuring 350 mm x 1000 mm and length x 3000 mm. The coking coal used is indoor furnace blend coal with a moisture content of 10% and a grain size of 3 mm or less with a yield of 82%.

As a result, compared to the case where all the molding molds 1 are fixed, when the movable molds 1a and 1c of the present invention are provided,
It has been demonstrated that the frictional force during extrusion is significantly reduced, and the energy required to produce compacted coal per unit weight can be reduced by approximately 50%. Furthermore, it was confirmed that the wear of the liner attached to the inner surface of the molding die could be reduced, leading to a reduction in operating consumption.

Incidentally, the moving distance L1 of the push plate in the compression process as shown in FIG. Bulk density of compression molded coal and distance L2 between continuous compression molded coal and push plate when charging raw coal
For example, if the initial packing bulk density is determined by
Assuming that 0.75 wet tons/m ³ , the bulk density of the compacted coal was 1.15 wet tons/m ³ , and L2 was 1500 mm, L1 was 520 mm.

FIG. 4 shows a top view of a different embodiment of the invention. The molding die 1 consists of a fixed die 1b, a movable die 1c, and dies corresponding to 1a and 1b in FIG. 2, although not shown. A suitable number of main cylinders 8 for moving the press plate 4 are fixed to a cylinder support 9, and a connecting rod 10 is provided to connect the cylinder support 9 and the molding die 1. An appropriate number of hydraulic lateral pressure release cylinders 11 are used as moving means for rotating the movable mold 1c. This cylinder 11
is connected to the fixed mold 1b by a connecting arm 14, and is connected to the movable mold 1c via a rod 12. Further, the movable mold 1c is rotatably connected to the molding mold 1 at one end by a pin 13.

With this configuration, in FIG. 4 showing the process corresponding to FIG. 2c, the lateral pressure is resisted by the lateral pressure release cylinder 11 until the compressed briquette 6a and the tracking compression briquette 6b are combined. The molds are kept at a constant cross section, and after the assembly is completed, the cylinder 11 rotates the movable mold 1c around the pin 13 to remove the surface pressure on the continuous compression molded coal 6c. The extrusion force required in the extrusion process (L2-L1 value is 980 mm) is several percent of the compression force of coking coal 5.
It will be about. Therefore, the continuous compression molded coal 6c can be taken out by the main cylinder 8 with less frictional force.

When the press plate 4 is returned by the main cylinder 8 in the direction opposite to the opening of the mold 1, the lateral pressure release cylinder 1
1 can be operated to close the movable mold 1c. At this time, the continuous compression molded coal 6c is pressurized from the side, but this pressurizing force satisfies the supporting force due to friction of the charged coking coal 5 during the compression process,
Pressure is then reduced to a value close to the minimum, and compressed briquette 6
It is better to reduce the influence on a. In this way, endless compacted coal can be produced continuously, similar to the embodiment described in FIGS. 2a to 2c.

FIG. 5 shows a plan view of a further embodiment of the invention. The molding die 1 includes a fixed die 1b and a movable die 1.
It consists of c. A suitable number of main cylinders 8 for moving the press plate 4 are fixed to a cylinder support 9, and a connecting rod 10 is provided to connect the cylinder support 9 and the molding die 1. Appropriate number of lateral pressure release cylinders 1 for linearly moving the movable mold 1c
1 is connected to a fixed mold 1b by a connecting arm 14, and is connected to a movable mold 1c via a rod 12.

According to such a configuration, in FIG. 5 showing a process corresponding to FIG. 2c, until the compressed briquette 6a and the tracking compression briquette 6b are combined, the lateral pressure is released by the lateral pressure release cylinder 11. The molds are kept at a constant cross section by resisting, and after the merging is completed, the side pressure release cylinder 11 linearly moves the movable mold 1c away from the continuous compression molded coal 6c via the rod 12, and releases the movable mold 1c from the continuous compression molded coal 6c. Can remove lateral pressure. Therefore, the extrusion force required in the extrusion step is smaller than the compression force of the raw coal 5, and the continuous compression molded coal 6c can be taken out by the main cylinder 8 with less frictional force.

The embodiment shown in FIG. 5 requires a stronger force to push out the continuous compression briquette 6c compared to the embodiment shown in FIG. Less pressure is required.

As explained in detail above, in the process of extruding continuously compressed briquette coal to take it out from the opening of the mold, the movable mold of the fixed mold and the movable mold constituting the mold is moved. A method for continuously producing compression molded coal that reduces the side pressure applied to the compression molded coal and reduces the extraction friction force by Continuous production of compression molded coal, which has a moving means for moving the mold, and allows the movable mold to be moved by the moving means when extruding the continuous compression molded coal from the opening of the mold. This device reduces the frictional force during extrusion compared to the conventional case in which the molding die 1 is all fixed, and reduces the energy required to produce compacted coal by 50% per unit weight. There is an effect that can be reduced to a certain degree.

[Brief explanation of drawings]

Figures 1a to 1c are elevational configurations and operational views showing the cross-section of a compression briquette manufacturing apparatus using a conventional fixed molding mold, and Figures 2a to 2c are diagrams showing the movable molding mold of the present invention. Fig. 2 d is a cross-sectional view taken along the - line c in Fig. 3; Figure 3c is an explanatory diagram of the moving distance of the press plate, and Figures 4 and 5 are diagrams showing the amount of work when the movable mold of the present invention is used.
The figures are top views of different embodiments. 1, 1a, 1b, 1c, 1d...molding mold, 4
... Pressing plate, 5 ... Raw coal, 6 ... Compression molded coal, 6
a...Pre-compressed briquette charcoal, 6b...Tracking compression briquette charcoal,
6c...Continuous compression molded coal, 11...Hydraulic cylinder.

Claims (1)

[Scope of Claims] 1. Compression molded coal that is formed from raw coal into compression molded coal in a molding die, and which is extruded after combining the compressed molded coal and the compressed molded coal left in the opening of the molding mold. In the continuous production method, in the process of extruding the combined compressed briquette coal and taking it out from the opening of the molding die, by moving the movable mold of the fixed mold and the movable mold that make up the molding mold. . A method for continuously producing compression molded coal, characterized in that the side pressure applied to the compression molded coal is reduced to reduce extrusion frictional force. 2. In a continuous compression molding coal production apparatus having a molding die and a press plate that moves within the molding die to compress raw coal, the movable mold of the fixed mold and the movable mold constituting the molding mold. It has a moving means for moving the mold, and pushes the push plate forward to mold the tracking compression molded coal within the molding die, and further pushes the push plate in the compression direction to move the continuous compression molded coal into the molding mold. 1. An apparatus for continuous production of compacted charcoal, characterized in that a movable mold can be moved by the moving means when extruding from the opening of the charcoal. 3. Claim 2, wherein the moving means is a hydraulic cylinder that rotates a movable mold whose one end is rotatably supported by a fixed mold toward the outside of the continuous compression molded coal. The continuous production apparatus for compacted charcoal described above. 4. The apparatus for continuously producing compressed briquette coal according to claim 2, wherein the moving means is a hydraulic cylinder that moves the movable mold outwardly of the continuous compression briquette coal.