WO2006070924A1

WO2006070924A1 - Coke pushing method and coke pusher machine

Info

Publication number: WO2006070924A1
Application number: PCT/JP2005/024240
Authority: WO
Inventors: Kazushige Ishino; Teturo Uchida; Shunichi Kamezaki; Yasuhiro Fukushima
Original assignee: Jfe Steel Corporation
Priority date: 2004-12-28
Filing date: 2005-12-27
Publication date: 2006-07-06
Also published as: EP1832644A4; KR20070072896A; TWI299359B; EP1832644B1; CN101048481B; EP1832644A1; CN101048481A; KR100893468B1; TW200641108A

Abstract

Provided are a coke pushing method and a coke pusher machine which can appropriately reduce a pushing load when a lump coke is pushed out from a carbonization chamber, to thereby reduce the damage to a coke oven wall. A coke pushing method and a coke pusher machine, wherein a pushing face (22b) toward a lump coke (11) of a ram head (22) is vibrated in the pushing direction by a vibrator (23), to thereby carry out pushing while imparting vibration to the lump coke (11).

Description

Specification

Coke extrusion method and coke extrusion apparatus

The present invention relates to a coke pushing method and a coke pusher machine for extruding generated coke from a carbonization chamber in a coke oven. In particular, a coke extrusion method that reduces the pushing load, reduces damage to the coke oven wall, and extends the life-prolonging of the furnace wall. The present invention relates to a coke extrusion device. In the present invention, unless otherwise specified, the coke oven refers to a chamber-type coal-tease furnace. A chamber-type coke oven has a heat storage chamber at the bottom of the furnace body, and combustion chambers and carbonization chambers are arranged alternately above it. Background art

In a coke oven, when cous (coke lump) produced by dry distillation of coal (coal) in the carbonization chamber is pushed out from the carbonization chamber using an extrusion device, As a result, cotus sticking occurs, and as a result, the pushing load increases and a large force acts on the oven wall of the coke oven carbonization chamber, which may damage the furnace wall. If the clogging is severe, the furnace wall will be destroyed, or it will not be possible to extrude with an extruding device, and the coke will be burned out manually after the furnace temperature is lowered. For this reason, there is a problem that if the repairing work cost of the furnace wall increases, it will be necessary to reduce the amount of production due to the shutdown of the power reactor.

On the other hand, the following technologies have been proposed to reduce the extrusion load and prevent damage to the furnace wall.

For example, when repairing an oven floor brick in a coke oven carbonization chamber, dry coke powder is placed in the carbonization chamber, and the dry powder cotas removes the recess on the surface of the furnace bottom leg. By filling and flattening, the coke at the time of coke extrusion A method for reducing the friction between the coke lump and the bottom of the furnace has been proposed (see, for example, Japanese Patent Application Laid-Open No. 59-1808.82).

In addition, prior to charging raw coal into the carbonization chamber, granular (less than 5 mm) fire proof material (graphite, Si ₃ N ₄ etc.) is placed on the inclined furnace bottom. A technique has also been proposed in which the friction between the coatus mass and the bottom of the furnace during coke extrusion is reduced, and as a result, damage to the furnace wall is prevented (for example, Japanese Patent Laid-Open No. Hei 8- 1 2 0 2 7 8 See the official gazette.)

In addition, Soviet Patent No. 9 8 1 3 4 0 discloses a device for carrying out the coatas by causing the horizontal shovel to vibrate up and down to collapse the coatas in the carbonization chamber into the bucket.

However, with the techniques described in the above-mentioned Japanese Patent Application Laid-Open Nos. Sho 5 9-1870 082 and Japanese Patent Application Laid-Open No. Hei 8-1 2 0 2 7 8, . That is, the techniques described in the above-mentioned Japanese Patent Application Laid-Open Nos. 59-187072 and Japanese Patent Application Laid-open No. 8-1202078 are all related to the coatus mass, the bottom of the coking chamber, However, the main cause of the occurrence of coutus clogging and the increase in the extrusion load is not the frictional force between the coke mass and the bottom of the carbonization chamber, but by using an extrusion device. When extruding, the coke mass pushed by the ram head of the extrusion device is deformed, broken down, and expanded in a horizontal direction perpendicular to the extrusion direction. This is because the frictional force between the coatus mass and the carbonization chamber side wall is increased.

In addition, the Soviet Patent No. 9 8 1 3 4 0 does not use the extrusion device that is the subject of this application, but causes the horizontal shovel attached to the bucket to vibrate up and down, causing the coke in the carbonization chamber to fall into the bucket. In addition, the coke in the furnace is scooped out many times in the bucket, and it takes much time to carry out the coatas compared to the coke oven using an extrusion device.

The present invention has been made in view of the above circumstances, and when extruding a coke lump from a coking chamber of a coke oven, the extrusion load is accurately reduced to prevent damage to the coke oven wall. It is an object of the present invention to provide a coke extrusion method and a coke extrusion device that can be reduced. Disclosure of the invention

In order to solve the above problems, the present invention has the following features.

1. Coutus extrusion method characterized in that when the coke mass is pushed out of the carbonization chamber by pushing the ram head of the extrusion device against the cotas mass in the carbonization chamber of the coke oven, the cotas mass is pushed out while applying vibration. .

2. The cortus extrusion method according to 1 above, wherein vibration is applied to the coke mass when the extrusion load is a predetermined value or more.

3. The method of pushing out the cotas according to the above 1, characterized in that vibration is applied to the coatus mass when the moving distance of the ram head from the pushing start position is within a predetermined range.

4. The coke extrusion method according to any one of 1 to 3, wherein the vibration is applied by vibrating a ram head.

5. The coatus extrusion method according to 4 above, wherein the ram head is divided into a plurality in the height direction, and at least one of the ram heads is vibrated.

6. The coke extrusion method according to 1 to 5, wherein the vibration direction of the ram head is vibration including at least a component in the extrusion direction.

7. The coke extrusion method according to 1 to 6, wherein the vibration of the ram head is a vibration including one or more frequency components of 2 Hz to 100 Hz.

8. The coatus extrusion method according to 1 to 7, wherein the vibration of the ram head is a waveform vibration including one or more sine waves.

9. The coke extrusion method according to 1 to 8, wherein the vibration of the ram head is at least 0.5 G to 10 G acceleration.

1 0. When blended coal is charged into a coke oven to produce coke, the coke lump in the coke oven chamber is pressed against the coke mass in the coke oven and the ram head of the extruding device is pressed to extrude the coke mass from the carbonization chamber, A manufacturing method of cortas that extrudes while giving vibration to the coke mass. 1 1. The method of producing coatus according to 10, wherein the load-average volatile content of the blended coal lot is 29 mass% or more or 25 mass% or less.

12. The method of producing coatus according to 10 or 11 above, wherein the load-average expansion pressure of the blended coal lot is 6 kPa or more.

13: The method of producing coatus according to 10 to 12, wherein a blending ratio of coal having an expansion pressure of 20 kPa or more among the blended coals is 2 Oniass% or more.

14. A cortas extrusion device that pushes the ramhead from the carbonization chamber by pressing the ramhead against the cotus mass in the coking chamber of the coke oven, and the ramhead vibration means for vibrating the ramhead A coke extrusion device characterized by comprising:

15. The coke according to 14 above, wherein the ram head is divided into a plurality of parts in the vertical direction, and the ram head vibration means vibrates at least one of them. Extruder device.

16. The coke pushing apparatus according to the above 14 or 15, wherein the vibration direction of the ram head is a vibration containing at least a pushing direction component.

17. The coke extrusion device according to the above 14 to 16, wherein the vibration of the ram head is vibration including one or more types of frequency components of 2 Hz to 100 Hz.

18. The coke extrusion device according to 14 to 17, wherein the vibration of the ram head is a waveform including one or more types of sine waves.

19. The coke pushing apparatus according to the above 14 to 18, wherein the vibration of the ram head has an acceleration level of at least 0.5 G to 1 OG.

In the present invention, the coke lump is pushed out from the carbonization chamber while applying vibration to the coatus lump, so that the friction between the coke lump and the carbonization chamber furnace wall causes static friction. From friction to kinetic friction, the coefficient of friction decreases, thereby reducing the extrusion load. As a result, damage to the furnace wall can be suppressed, operation delays caused by clogging can be avoided, and productivity can be increased.

In addition, regardless of the volatile content of the blended coal, the expansion pressure of the blended coal, and the blending amount of the high expansion pressure coal, the maximum extrusion load current does not exceed the control level, making it very easy to manage the blended coal. The In addition, low cost volatile coal, low volatile coal, or high expansion pressure coal can be used.

The “cotus mass” referred to in the present invention refers to the entire coke in the carbonization chamber, and does not mean only the block-shaped cotus mass in which the cotas are fixed. The coatus cracks during the cooling process, but during the extrusion process, the coatus can come into close contact with each other and transmit vibration to the entire coatus, so there is no need for the block form to which the coatus is fixed. Brief Description of Drawings

FIG. 1 is a side view for explaining an embodiment of the present invention.

FIG. 2 is a perspective view of a coatus extrusion device according to an embodiment of the present invention. Fig. 3 is a diagram showing the effect of the present invention.

Fig. 4 shows the vibration test equipment using a small coke oven of lmXO.8mX0.4m. Fig. 5: Changes in pushing force when the excitation frequency is 40Hz and the excitation level is about 1G. Fig. 6: Changes in pushing force when the excitation frequency is 50Hz and the excitation level is about 1G. Fig. 7: Excitation frequency change at 60 Hz, excitation level approx. 1. 5G.

Fig. 8: Changes in push force when the excitation frequency is 30 Hz and the excitation level is about 0.2G.

Figure 9: Relationship between volatile matter (VM) of blended coal and maximum extrusion load current ratio.

Figure 10: Relationship between expansion pressure (kPa) of blended coal and maximum extrusion load current ratio.

Fig. 11: Shows the relationship between blending ratio of high expansion pressure coal and maximum extrusion load current ratio.

(Explanation of symbols)

10 Carbonization chamber

20 coatus extrusion equipment

21 Extrusion ram

22, 32 Ramhead 2 2 a, 3 2 a upper pushing face

2 2 b, 3 2 b middle pushing face

2 2 c, 3 2 c lower pushing face

2 3, 3 3 Vibrator

2 4 Caro shaker (vibration rod)

3 0 fe: ^ simulated coke oven

3 1 wall

3 4 load cell

3 5 Hydraulic cylinder

3 6 converter

3 7 † Measurement equipment (personal computer)

3 8 Acceleration pickup (B & K 4383) (acceleration pickup)

3 9 Charger Amplifier (B & K 2635) (charge amplifier) BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a side view for explaining an embodiment of the present invention, and FIG. 2 is a perspective view of a coke extrusion device according to an embodiment of the present invention.

In Fig. 1, 10 is a coking oven carbonization chamber, in which a cotus mass 11 is generated. 1 and 2, reference numeral 20 denotes a coatus extrusion device according to an embodiment of the present invention, which includes a pushing ram 21 and a pushing ram drive unit (not shown). Ram head 2 2 provided at the tip of the extrusion ram 2 1 and the pressing surface of the ram head 2 2 pressed against the coke lump 1 1 is the upper pressing surface 2 in the vertical direction. 2 a, Intermediate pressing surface 2 2 b, Lower pressing surface 2 2 c Divided into three pressing surfaces, of which the largest pressing area is the intermediate pressing surface 2 2 b A vibration exciter 2 3 for vibrating in the push-out direction via a vibration rod 2 4 is attached to the push-out ram 21. The procedure for extruding the coke lump 11 from the coking chamber 10 using the coke extrusion apparatus 20 configured as described above is shown below.

(1) First, as shown in Fig. 1, from the state of waiting outside the carbonization chamber 10, push the pushing ram 2 1 and press the pressing surfaces 2 2 a, 2 2 of the ram head 2 2 Press b, 2 2 c against the coatus mass 1 1 in the coking chamber 10 to advance the ram head 2 2.

(2) Next, when the push-out load (push-out load) exceeds a predetermined value (specifically, for example, when the load current value of the push-out ram drive device exceeds the predetermined value), the vibrator 2 The intermediate pressing surface 2 2 b is vibrated in the pushing direction by 3 and the ram head 2 2 is moved forward while applying vibration to the coke lump 1 1. The detection of the push load is calculated from the load current value of the push ram drive device, for example.

(3) Then, when the pushing load becomes smaller than the predetermined value, the vibration of the intermediate pressing surface 2 2 b is stopped, and the pushing ram 21 is continuously advanced in this state.

(4) Finally, when the entire coke lump 1 1 is pushed out from the coking chamber 10 force, the pushing ram 2 1 is moved back to the initial waiting position (position in readiness).

By extruding the cortas lump 11 as described above, the friction applied between the cotas lump 11 and the furnace wall of the carbonization chamber 10 changes from static friction to dynamic friction due to the vibration applied to the coke lump 1 1. Thus, the coefficient of friction decreases, thereby reducing the extrusion load. As a result, damage to the furnace wall can be suppressed, operation delays due to clogging can be avoided, and productivity can be increased.

In the above, when the extrusion load exceeds a predetermined value, vibration is applied to the coke block 11 and when the extrusion load becomes smaller than the predetermined value, the application of vibration is stopped. However, the push load is usually maximized because the ram head 2 2 has moved forward 1 m to 1.5 m from the push start position. If the distance exceeds 1.5 m, you can stop applying vibration to the coke block 1 1. Further, vibration may always be applied from the start of extrusion to the end of extrusion.

(5) Vibration form of the ram head of the present invention The vibration direction of the ram head of the present invention can be either the vertical direction or the extrusion direction of the furnace as long as vibration can be applied to the entire coke mass. However, it is difficult to reliably transmit vibration from the ram head to the entire coke mass, for example, vibrations mainly in the vertical direction of the furnace. For example, a plurality of protrusions are provided on the ram head to create a coke mass. It is necessary to devise such as piercing the protrusion. However, in this case, only the peripheral part of the Koitas lump pierced by the protrusion of the ram head vibrates, and it is highly likely that only the Cotas lump will collapse, and it is difficult to transmit vibration to the entire coke lump. Furthermore, when the main direction is the upward and downward vibration direction, it includes the direction of lifting the coke mass, so the load on the shaker is large and the drive capacity of the shaker needs to be increased.

From the above, the vibration direction of the ram head of the present invention is the vibration direction including the vibration component of the push-out direction, and the structure of the ram head of the present invention can be simplified. This is preferable because the drive capacity of the vibrator can be reduced. More preferably, a vibration direction mainly including a vibration component in the extrusion direction is more preferable. More specifically, the vibration according to the present invention is preferably applied in parallel with the extrusion direction, but may be applied in an obliquely upward direction or a diagonally downward direction.

In the above example, the vibrator 2 3 is connected only to the intermediate pressing surface 2 2 b, but the vibrator is also connected to the upper pressing surface 2 2 a and the lower pressing surface 2 2 c. Then, one or more pressing surfaces to be vibrated may be appropriately selected and vibrated. -In this embodiment, the pressing surface of the ram head 2 2 is divided into three parts, and the pressing force of the intermediate pressing surface 2 2 b of the ram head 2 2 b is maximized as required. Select the number to divide and the ratio of the pressing area. Of course, the pressing surface of the ram head 2 2 may not be divided.

In addition, the vibration frequency band is preferably a single frequency of 2 Hz to 100 Hz, but two or more types of frequency components in this band may be included. Regular vibration or irregular vibration may be used. When the vibration frequency band exceeds 10 OHz, the vibration amplitude decreases, so the vibration effect on the coke mass decreases. More preferably, it is 6 OHz or less. In addition, if the frequency band of vibration is less than 2 Hz, it is necessary to increase the energy input to the shaker in order to obtain sufficient acceleration, The effect of vibration is likely to be insufficient. In particular, a force of 30 Hz to 60 Hz is preferable.

The vibration waveform is preferably a device that vibrates the ram head with a waveform including one or more types of sine waves. Further, it is not necessarily a sine wave, and a waveform such as a triangular wave, a rectangular wave, a continuous inpulse wave, or a mixed waveform thereof may be used.

The vibration acceleration level should be at least 0.5 G to give effective vibration to the coke mass. An acceleration level of 1 G or higher is even more preferable. In addition, considering the mechanical strength of the extrusion device, a force of 10 G or less is preferable. The acceleration level “G” is gravitational acceleration and lG = 9.8 m / s ² . Note that the acceleration level measurement is not specifically regulated. For example, an accelerometer attached to the vibration part of the test ram

(B & K's Piezoelectric Charge Accelerometer model number Type 4383) is converted by a charge amplifier (B & K's Charge Amplifier model number Type 2635) and recorded on a personal computer.

Note that the structure of the vibrator used in the present invention is preferably a device that can arbitrarily adjust the frequency and acceleration level, and a motor, hydraulic pressure, hydraulic pressure, or the like can be adopted as the driving method. However, as a vibration mechanism that can be mounted in a narrow space from a high temperature load, for example, a Pibro hammer or an air hammer can be used.

(6) Volatility of blended coal that can be applied to the present invention (volatile matter, hereinafter referred to as VM) Applicable to coal blends of 9 mass% or more, or 25 mass% or less. The volatile content of blended coal brands is measured and controlled by sampling coal in units of lots such as coal mines and ships. In consideration of the volatile content of each lot before charging into the coke oven, the amount of coal input in each lot is blended. The weighted average volatile content was obtained by multiplying the input amount of each mouth by the volatile content and dividing by the total input amount. The analysis of volatile matter in each lot conforms to JISM 8812. Put the sample in a crucible with a lid to avoid contact with air, determine the mass fraction of the sample for heating loss when heated at 900 ° C for 7 minutes, and subtract the moisture measured at the same time to remove the volatile content. And Generally, when the volatile content of blended coal reaches 29 mass% or more, the amount of carbon deposition increases, and the carbon attached to the furnace wall grows. It becomes difficult to perform proper extrusion. By using the vibratory extruder of the present invention, the cake can be extruded without staying in contact with the carbon and the coatus cake. It should be noted that the maximum load average volatile content of the blended coal lot applicable to the present invention is usually 40 mass% since the maximum volatile content of the coking coal brand is 40 mass _S %. On the other hand, generally, when the volatile content of coal blend is less than 25 mass%, the gap between the furnace wall and the coke cake becomes small, and if there is a convex part on the furnace wall, the convex part and the coke cake come into contact with each other, making it impossible to perform a smooth extrusion. . By using the vibration extruder of the present invention, the friction between the convex portion and the coke cake is reduced, and the extrusion can be performed without the cake remaining. The minimum value of the load average volatile content of each blended coal spout applicable to the present invention is usually 15 raass% since the minimum volatile content of the coking coal brand is 15 mass%.

(7) Expansion pressure of blended coal applicable in the present invention

The blended coal used in the present invention can be applied even when the load-average expansion pressure of each blended coal spit, which could not be applied conventionally, is 6 kPa or more. The expansion pressure of each blended coal outlet is sampled and controlled by sampling the coal in units of lots such as each coal mine and every ship. The amount of coal input for each lot is blended in consideration of the expansion pressure for each lot before being charged into the coke oven. The weighted average expansion pressure was calculated by multiplying the input amount of each lot by the expansion pressure and dividing by the total input amount. The expansion pressure is measured by adjusting the coal to l-3 ram, putting it in a crucible with a diameter of 50 mm and a height of 70 mm, and adjusting the bulk density to 775 kg / m ³ , covering the crucible and covering the differential pressure gauge with the coal. Insert inside. Raise the temperature of the crucible to 1000 ° C at 4 ° C / min and read the maximum value of the differential pressure during the temperature raising process.

Generally, when the expansion pressure of blended coal is high, the shrinkage during dry distillation is reduced and the gap between the furnace wall and the coke cake is reduced. If there is a convex part on the furnace wall, the convex part and the coke cake come into contact with each other, and a smooth extrusion is possible. Disappear. By using the vibratory extruder of the present invention, the friction between the convex part and the coatus cake is reduced, and the extrusion is performed without the cake remaining. It becomes possible. The maximum value of the weight average expansion pressure of the blended coal brand applicable to the present invention is normally 9 kPa because the maximum expansion pressure of the coking coal brand is 9 kPa.

(8) Mixing rate of high expansion pressure coal that can be applied in the present invention

The blended coal used in the present invention has a blending ratio of high expansion pressure coal that cannot be applied conventionally, 2 Omassy. It is applicable also to the above.

Of general coal blend, (beyond 2000mmH ₂ 0, 20 kPa greater than) high expansion圧炭blending ratio of, 2 0 mass f is the contraction at the time of carbonization is a gap of less and less furnace wall and the coke cake small fence Therefore, if there is a convex part on the furnace wall, the convex part and the coatus cake come into contact with each other, making it impossible to perform a smooth extrusion. By using the vibration extruder of the present invention, the friction between the convex part and the coke cake is reduced, and the cake can be extruded without staying. Among the blended coals applicable to the present invention, the maximum blending ratio of the high expansion pressure coal is 100 ma _SS %. Blue Creek (US): 68 k Pa (69 40mmH ₂ O), South Nacht (Russia): 34 k Pa (3453mmH ₂ 0), Norwich (Australia): 73k Pa (7450mmH ₂ O), German Creek (Australia): 43k Pa (4420mmH ₂ O). Example 1

An excitation experiment was conducted to examine the effect of vibration. A small coke oven 30 of IraXO.8mX0.'4m shown in Fig. 4 was charged with the cotas lump 11 produced in advance in a small coke oven of the same size as the simulated coke oven, and applied to the side wall 31. A force was applied and pressed, and vibration was applied from the end face with a test ram (frequency 1 to 1 10 Hz, acceleration level 0.3 to 12 G, sine wave), and the required force was measured. Half of the test ram 32 was vibrated, and was vibrated from the back with the vibrator 33. Figures 5 to 8 show examples of the pushing force transition. The horizontal axis represents time (the position is indicated because the speed is constant), and the vertical axis represents the test ram force. The acceleration level is converted by the charge amplifier 39 (B & K Charge Amplifier model Type 2635) from the acceleration pickup 38 (B & K Piezoelectric Charge Accelerometer model number 4383) attached to the excitation part of the test ram. And recorded it on a computer. The pushing force was measured with a load cell 34. As the shaker 33, a vibration motor (high-speed rotation of an eccentric weight) was used. The vibration was turned on after a certain period of time from the start of extrusion, finally turned off, and then the extrusion was stopped. After starting extrusion in Fig. 5, the force became almost constant, and when the vibration was turned on, the pushing force decreased to about 1/2. It can be seen that when the vibration is turned off, the level returns to the level after the start. From this, it can be seen that the pushing force can be reduced to about 1/2 by vibration. The excitation frequency at this time was 40 Hz, and the excitation level was about 1G. Fig. 6 shows an excitation frequency of 50 Hz and an acceleration level of about 1 G. Fig. 7 shows an excitation frequency of 60 Hz and an acceleration level of about 1.5 G. As a result, the pushing force could be reduced to about 1/2. Although not shown in the drawing, when the excitation frequency is 2 Hz to 100 Hz and the speed speed level is within the range of the present invention of 0.5 G to 10 G, the pushing force can be reduced. In particular, the pushing force was greatly reduced when the excitation frequency was 30-60 Hz.

In FIG. 8, the excitation frequency was 30 Hz and the acceleration level was about 0.2 G. However, since the acceleration level was outside the scope of the present invention and was small, the pushing force could not be reduced. Note that even when the excitation frequency outside the scope of the present invention was 1 Hz and the acceleration level was about 1 G, the pushing force did not drop significantly during the process. As a comparative example, there was no significant drop in the pushing force in the middle of the force in which the experiment was not performed. Example 2

As an example of the present invention, in an actual chamber-type coke oven, the coke extrusion apparatus 20 shown in FIGS. 1 and 2 was used to perform extrusion while applying vibration to the coke mass. The acceleration level was measured in the same manner as in Example 1.

The vibration frequency was 40Hz and the acceleration level was 1G. The blended coal used in the examples had a load average volatile content of 27.2% for each lot, a load average expansion pressure for each lot of 4.3 kPa, and a high expansion pressure coal blending ratio. 17%. On the other hand, as a comparative example, the coke lump was extruded without applying vibration as before. The extrusion load ratio (relative ratio) in the present invention example and the comparative example is shown in FIG. 3. In the present invention example, the maximum extrusion load ratio is significantly reduced compared to the comparative example. The extrusion load ratio is shown as a relative ratio with the peak value of the extrusion load of the comparative example being 1.0.

Thereby, the effect of the present invention was confirmed. Example 3

As an example of the present invention, extrusion was performed in an actual coke oven using the coke extrusion apparatus 20 shown in FIG. 1 and FIG. The acceleration level was measured in the same manner as in Example 1.

The vibration frequency was 50 Hz and the acceleration level was 2G. The blended coal used in this example had a load average volatile content of 24% to 31% for each lot, and a load average expansion pressure for each lot of 4. l kPa to 7.2 kPa, high expansion. The effect of the present invention was examined by changing the blending ratio of the compressed coal in the range of 11% to 26%. The temperature at the bottom of the combustion chamber of the coke oven at this time is 1240 ° C, and the total carbonization time is 18-19 hours.

Figure 9 shows the volatile matter (VM) and the maximum extrusion load current ratio (relative ratio) when the average expansion pressure for each lot is 4.5 kPa and the blending ratio of the high expansion pressure coal is 15%. ) Is shown. Figure 10 shows the blended coal expansion pressure (kPa) and maximum extrusion load current when the load average volatile content for each lot is 27.3% and the high expansion pressure coal blending ratio is 15%. The relationship of the ratio (contrast) is shown. Figure 11 shows the blending ratio of high expansion pressure coal in the case where the load average volatile content per lot is 27.3% and the load average expansion pressure per mouth is 5.1 kPa. And the maximum extrusion load current ratio (relative ratio). The maximum extrusion load current ratio is shown as a relative ratio with a management value (management level) of 1.00.

As is clear from FIGS. 9 to 11, in the case of the present invention, the maximum extrusion load current exceeds the control level regardless of the volatile content of the blended coal, the expansion pressure of the blended coal, and the blending amount of the high expansion pressure coal. Because there is no, management of blended coal is very easy. In addition, low cost volatile coal, low volatile coal, or high expansion pressure coal can be used, resulting in a large cost advantage. On the other hand, when the extrusion method of the present invention is not used, the maximum extrusion load current ratio (comparative) must be made unless the volatile content range of the blended coal and the blended coal with the appropriate expansion pressure or the appropriate high expansion pressure coal blending ratio are used Therefore, it is necessary to strictly control the volatile matter and expansion pressure of the blended coal used, and the blending ratio of the high-expansion pressurized coal, resulting in high production costs. Industrial applicability

In the present invention, the Cotas mass is pushed out of the carbonization chamber while applying vibration to the coke mass, so that the friction between the Cotas mass and the chamber wall changes from static friction to dynamic friction. As a result, the coefficient of friction is lowered, thereby reducing the extrusion load. As a result, damage to the furnace wall can be suppressed, operation delays due to clogging can be avoided, and productivity can be increased.

In addition, regardless of the volatile content of the blended coal, the expansion pressure of the blended coal, and the blending amount of the high expansion pressure coal, the maximum extrusion load current does not exceed the control level, making it very easy to manage the blended coal. The In addition, it is possible to use cheap volatile coal with low cost, low volatile content, or high expansion pressure.

Claims

The scope of the claims

1. Coke extrusion method to extrude the coke lump while applying vibration to the coke lump when pushing the ram head of the extrusion device against the coat mass in the carbonization chamber of the coke oven. .

2. The coke extrusion method according to claim 1, wherein when the extrusion load is a predetermined value or more, vibration is imparted to the coatus mass.

3. The coke extrusion method according to claim 1, wherein the coke lump is vibrated when the ram head moving distance from the extrusion start position is within a predetermined range.

4. The coke extrusion method according to claim 1, wherein the vibration is applied by vibrating a ram head.

5. The coke extrusion method according to claim 4, wherein the ram head is divided into a plurality of parts in the vertical direction, and at least one of them is vibrated.

6. The coke extrusion method according to claim 1, wherein the vibration direction of the ram head is vibration including at least an extrusion direction component.

7. The coke extrusion method according to claim 1, wherein the vibration of the ram head is vibration including one or more types of frequency components of 2 Hz to 100 Hz.

8. The coke extrusion method according to claim 1, wherein the vibration of the ram head is a vibration of a waveform including one or more types of sine waves.

9. In claim 1-8, the vibration of the ram head is at least 0.5G-1

Coke extrusion method with an acceleration level of 0 G.

1 0. The blended coal is charged into the coke oven to produce coke, and when the coke mass is pushed out of the carbonization chamber by pushing the ram head of the extrusion device against the cotus mass in the carbonization chamber of the coke oven, A manufacturing method of coatus that extrudes while applying vibration to the mass.

1 1. The method of producing coatus according to claim 10, wherein a load-average volatile content of the blended coal lot is 29 mass% or more or 25 mass% or less.

1 2. The manufacturing method of coatus according to claim 10 or 11, wherein a load-average expansion pressure of the blended coal spit is 6 kPa or more.

1 3. The method for producing a coatus according to claim 10, wherein the blending ratio of coal having an expansion ratio of 20 kPa or more is 2 Omass% or more.

1 4. Cortus extrusion device that pushes the ramhead against the coke mass in the coking chamber of the coke oven and pushes out the cotas mass from the carbonization chamber. The ramhead vibration means is used to vibrate the ramhead. Cortus extrusion device equipped with.

1 5. The ram head is divided into a plurality of parts in the vertical direction, and the ram head vibration means vibrates at least one of them. Coke extrusion device described in 1.

1 6. The coke extrusion device according to claim 14 or 15, wherein the vibration direction of the ram head is vibration including at least an extrusion direction component.

1 7. The coke extrusion apparatus according to claim 14 to 16, wherein the vibration of the ram head is a vibration including one or more types of frequency components of 2 Hz to 100 Hz.

''-,. (:

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18. The coatus extrusion device according to claim 14 to 17, wherein the vibration of the ram head is a waveform including one or more kinds of sine waves.

19. Coke extrusion device according to claims 14-18, wherein the vibration of the ram head is at an acceleration level of at least 0.5 G to l OG.