JP2006206898A - Coke pushing method, coke pusher machine and method for producing coke - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide 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. <P>SOLUTION: 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 in the coke pushing method and the coke pusher machine. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a coke extrusion method and a coke extrusion apparatus for extruding generated coke from a carbonization chamber in a coke oven, and in particular, to reduce extrusion load, reduce coke oven wall damage, and extend the life of the furnace wall. TECHNICAL FIELD The present invention relates to a coke extrusion method and a coke extrusion apparatus that can achieve the above. In the present invention, unless otherwise specified, the coke oven refers to a chamber type coke oven. The chamber furnace type coke oven has a heat storage chamber at the lower portion of the furnace body, and combustion chambers and carbonization chambers are alternately arranged at the upper portion thereof.

  In the coke oven, when coke (coke lump) produced by carbonizing coal in the carbonization chamber is extruded from the carbonization chamber using an extrusion device, the coke is clogged in the carbonization chamber, resulting in an increase in the extrusion load. As a result, a large force acts on the furnace wall of the coke oven carbonization chamber, and the furnace wall may be damaged. When the clogging is severe, the furnace wall is destroyed, or it cannot be pushed out by the extrusion device, and the furnace temperature is lowered, and then the coke is scraped out manually. For this reason, there are problems such as an increase in the repair cost of the furnace wall and a reduction in the production amount due to the shutdown of the furnace.

  On the other hand, the following has been proposed as a technique for reducing the extrusion load and preventing damage to the furnace wall.

  For example, when repairing the bottom brick in the carbonization chamber of the coke oven, the dry powder coke is placed in the carbonization chamber, and the dry powder coke fills the recesses on the surface of the bottom brick and flattens it. A method for reducing the friction between the lump and the furnace bottom has been proposed (see, for example, Patent Document 1).

Further, prior to charging the raw coal to the carbonization chamber, the particulate refractory material (5mm or less) (such as graphite or Si ₃ N ₄₎ leave spread the beveled furnace bottom, lump coke and the oven during coke extrusion A technique has also been proposed in which friction between the bottoms is reduced, and as a result, furnace wall damage is prevented (see, for example, Patent Document 2).

Patent Document 3 discloses a device for carrying out coke by vibrating a horizontal shovel up and down to collapse coke in the carbonization chamber into a bucket.
JP 59-187082 A JP-A-8-120278 Soviet Union Patent No. 981340

  However, the techniques described in Patent Documents 1 and 2 do not lead to a sufficient push load reduction.

  That is, both of the techniques described in Patent Documents 1 and 2 are intended to reduce the frictional force between the coke lump and the carbonization chamber furnace bottom. The main cause of the increase is not the frictional force between the coke mass and the bottom of the coking chamber, but when the coke mass is extruded using an extrusion device, the coke mass pushed by the ram head of the extrusion device is deformed and collapsed. This is because the frictional force between the coke lump and the carbonization chamber side wall is increased by spreading in the horizontal direction perpendicular to the extrusion direction.

  In addition, the technique described in Patent Document 3 does not use the extrusion device targeted by the present application, vibrates the horizontal shovel attached to the bucket up and down, collapses the coke in the carbonization chamber into the bucket, The coke in the furnace is scooped out many times with a bucket, and it takes much time to carry out the coke compared to a 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 coke oven can accurately reduce the extrusion load and reduce damage to the coke oven wall. An object of the present invention is to provide an extrusion method and a coke extrusion apparatus. Furthermore, it aims at providing the coke manufacturing method which can manufacture coke using the desired coal blend using it.

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

  [1] A coke extrusion method characterized in that when a coke mass is pushed out from a carbonization chamber by pressing a ram head of an extrusion device against the coke mass in a carbonization chamber of a coke oven, the coke mass is extruded while applying vibration.

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

  [3] The coke extrusion method according to [1], wherein vibration is applied to the coke mass when the moving distance of the ram head from the extrusion start position is within a predetermined range.

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

  [5] The coke extrusion method according to [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 any one of [1] to [5], wherein a vibration including at least an extrusion direction component is applied as a vibration direction.

  [7] The coke extrusion method according to any one of [1] to [6], wherein vibration including one or more types of frequency components of 2 Hz to 100 Hz is applied.

  [8] The coke extrusion method according to any one of [1] to [7], wherein vibration having a waveform including one or more types of sine waves is applied.

  [9] The coke extrusion method according to any one of [1] to [8], wherein a vibration having a vibration level of 0.5G to 10G is applied.

  [10] A coke pushing apparatus for pushing the ram head against the coke lump in the carbonization chamber of the coke oven to push the coke lump out of the carbonization chamber, characterized by comprising ram head vibration means for vibrating the ram head. Coke extrusion device.

  [11] The coke pushing apparatus according to [10], 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.

  [12] The coke pushing apparatus according to [10] or [11], wherein the ram head is vibrated including at least a pushing direction component as a vibrating direction.

  [13] The coke extrusion device according to any one of [10] to [12], wherein the ram head is vibrated by including one or more types of frequency components of 2 Hz to 100 Hz.

  [14] The coke pushing device according to any one of [10] to [13], wherein the ram head is vibrated with a waveform including one or more types of sine waves.

  [15] The coke pushing apparatus according to any one of [10] to [14], wherein the ram head is vibrated at an acceleration level of 0.5G to 10G.

  [16] Charcoal is charged into a coke oven to produce coke, and when the coke mass is pushed out from the carbonization chamber by pushing the ram head of the extrusion device against the coke mass in the coking chamber of the coke oven, the coke mass vibrates. Coke production method characterized by extruding while imparting.

  [17] The coke production method according to the above [16], wherein the load average volatile content of the lot of blended coal to be used is 29 mass% or more or 25 mass% or less.

  [18] The coke production method according to [16] or [17] above, wherein the load average expansion pressure of the lot of blended coal used is 6 kPa or more.

  [19] The coke production method according to any one of [16] to [18], wherein a blended coal having an expansion pressure of 20 kPa or more and a blending ratio of 20 mass% or more is used.

  The coke mass referred to in the present invention refers to the entire coke in the carbonization chamber, and does not mean only the block-shaped coke mass in which the cokes are fixed. Coke cracks in the cooling process, but in the extrusion process, the cokes can come into close contact with each other and transmit vibrations to the entire coke, so there is no need for the block to have coke fixed.

  In the present invention, since the coke lump is pushed out from the carbonization chamber while applying vibration to the coke lump, the friction between the coke lump and the carbonization chamber furnace wall changes from static friction to dynamic friction. , The coefficient of friction is reduced, thereby reducing the extrusion load. As a result, damage to the furnace wall can be suppressed, operation delay due to clogging can be avoided, and productivity can be increased. In addition, the extrusion load (for example, the maximum load current value of the extrusion ram drive unit) does not exceed the control level regardless of the volatile content of the coal blend, the expansion pressure of the coal blend, and the blending amount of the high expansion pressure coal. Management of blended coal is very easy. In addition, low cost volatile coal, low volatile coal, or high expansion pressure charcoal can be used.

  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 in an embodiment of the present invention.

  In FIG. 1, reference numeral 10 denotes a coking chamber of a coke oven, in which a coke lump 11 is generated.

  1 and 2, reference numeral 20 denotes a coke extrusion device according to an embodiment of the present invention, which includes an extrusion ram 21, an extrusion ram drive device (not shown), and a ram head provided at the tip of the extrusion ram 21. 22, and the pressing surface of the ram head 22 pressed against the coke lump 11 is three pressings of an upper pressing surface 22 a, an intermediate pressing surface 22 b, and a lower pressing surface 22 c in the vertical direction. A vibration exciter 23 is attached to the extrusion ram 21 so as to vibrate the intermediate pressing surface 22b, which is divided into surfaces and has the largest pressing area, in the pressing direction via the vibration rod 24. .

  The procedure for extruding the coke lump 11 from the carbonization chamber 10 using the coke extrusion apparatus 20 configured as described above will be described below.

  (1) First, as shown in FIG. 1, the pushing ram 21 is operated from the state of waiting outside the carbonizing chamber 10, and the pressing surfaces 22 a, 22 b, and 22 c of the ram head 22 are coke in the carbonizing chamber 10. Press against the mass 11 to advance the ram head 22.

  (2) Next, when the pushing load (pushing load) becomes equal to or greater than a predetermined value (specifically, for example, when the load current value of the pushing ram driving device exceeds a predetermined value), the vibrator 23 The ram head 22 is advanced while the intermediate pressing surface 22b is vibrated in the pushing direction and the coke lump 11 is vibrated. The detection of the pushing load is calculated from the load current value of the pushing ram driving device, for example.

  (3) When the pushing load becomes smaller than a predetermined value, the vibration of the intermediate pressing surface 22b is stopped, and the pushing ram 21 is continuously advanced in this state.

  (4) Finally, when the entire coke lump 11 is pushed out from the carbonization chamber 10, the pushing ram 21 is moved back to the initial standby position.

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

  In the above, when the extrusion load becomes a predetermined value or more, vibration is applied to the coke lump 11, and when the extrusion load becomes smaller than the predetermined value, the application of vibration is stopped. Normally, the pushing load is maximized because the forward movement distance of the ram head 22 from the extrusion start position is 1 m to 1.5 m. If the forward movement distance of the ram head 22 exceeds 1.5 m, the coke lump 11 may be stopped from applying vibration. Further, vibration may be always applied from the extrusion start time to the extrusion end time.

  As the vibration direction of the ram head of the present invention, either the vertical direction or the extrusion direction of the furnace can be used 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 block, for example, vibrations mainly in the vertical direction of the furnace. is required. However, in this case, there is a high possibility that only the peripheral portion of the coke mass pierced with the protrusion of the ram head vibrates, and the coke mass of only that portion collapses, and it becomes difficult to transmit vibration to the entire coke mass. Furthermore, when the vibration direction in the vertical direction is mainly used, since it includes the direction in which the coke mass is lifted, the load on the shaker is large and the drive capability of the shaker needs to be increased.

  From the above, when the vibration direction of the ram head of the present invention is a vibration direction including a vibration component in the pushing direction, the structure of the ram head of the present invention can be simplified and the drive capability of the vibration exciter can be reduced. Therefore, it is preferable. More preferably, a vibration direction mainly including a vibration component in the pushing direction is more preferable.

  Further, in the above description, the vibration exciter 23 is connected only to the intermediate pressing surface 22b, but the pressing surface is also connected to the upper pressing surface 22a and the lower pressing surface 22c to vibrate and vibrate. One or more may be appropriately selected and vibrated.

  Further, in this embodiment, the pressing surface of the ram head 22 is divided into three parts so that the pressing area of the intermediate pressing surface 22b is the largest, but is divided as necessary. What is necessary is just to select the number and the ratio of the pressing area. Of course, the pressing surface of the ram head 22 need not be divided.

  The vibration of the present invention is preferably applied in parallel with the extrusion direction, but may be applied in an obliquely upward direction or an obliquely downward direction.

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

  The vibration waveform is not necessarily a sine wave, and may be a triangular wave, a rectangular wave, a waveform such as a continuous impulse wave, or a waveform in which they are mixed. A device that vibrates the ram head with a waveform including one or more types of sine waves is preferable.

Also, the acceleration level of vibration may be an acceleration level of 0.5 G or more in order to give effective vibration to the coke mass. Further, an acceleration level of 1G or more is more preferable. Moreover, it is preferable to set it as 10 G or less considering the mechanical strength of an extrusion apparatus. The acceleration level “G” is a gravitational acceleration of 1G = 9.8 m / s ² .

  The measurement of the acceleration level is not particularly specified. For example, the signal of the accelerometer (B & K's Piezoelectric Charge Accelerometer model number Type 4383) attached to the vibration part of the ram head is converted by a charge amplifier (B & K company Charge Amplifier model number Type 2635) and recorded on a personal computer. it can.

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

  And about the blended coal used by this invention, it is possible to apply the following blended coal which was not applicable conventionally.

(A) Volatile coal volatile matter (hereinafter referred to as VM) applicable to the present invention
The blended coal used in the present invention can be applied to a blended coal having a load average volatile content of 29 mass% or more or 25 mass% or less for each lot of blended coal that could not be applied conventionally. Note that the volatile content of the blended coal brand is managed by sampling the coal in units of lots, such as for each coal mine and ship, and measuring the volatile content. The amount of coal input in each lot is blended in consideration of the volatile content of each lot before being introduced into the coke oven. The weighted average volatile content was obtained by multiplying the input amount of each lot by the volatile content and dividing by the total input amount. The analysis of the volatile content of each lot conforms to JIS M 8812. The sample is put in a crucible with a lid so as to avoid contact with air, and the mass fraction of the sample for heating loss when heated at 900 ° C. for 7 minutes is obtained.

  In general, when the volatile content of blended coal reaches 29 mass% or more, the amount of carbon deposition increases, and carbon adhering to the furnace wall grows. During extrusion, the coke lump and carbon adhering to the furnace wall come into contact with each other, and a smooth extrusion is possible. It becomes difficult. By using the coke extrusion apparatus of the present invention, the coke mass can be extruded without staying at the time of contact between the carbon and the coke mass. Note that the maximum value of the load average volatile content of the blended coal lot applicable to the present invention is usually 40 mass% because the maximum volatile content of the brand of raw coal is 40 mass%.

  On the other hand, in general, when the volatile content of the blended coal is 25 mass% or less, the gap between the furnace wall and the coke lump becomes small, and when the furnace wall has a convex part, the convex part and the coke lump come into contact with each other, making it impossible to perform a smooth extrusion. By using the coke extrusion apparatus of the present invention, the friction between the convex portion and the coke lump is reduced, and the cake can be extruded without staying. In addition, the minimum value of the load average volatile matter for each lot of blended coal applicable to the present invention is usually 15 mass% because the minimum volatile content of the brand of raw coal is 15 mass%.

(B) Expansion pressure of blended coal applicable in the present invention The blended coal used in the present invention is applicable to a load average expansion pressure of 6 kPa or more for each lot of blended coal that could not be applied conventionally. The expansion pressure for each lot of blended coal is managed by sampling the coal in units of lots such as for each coal mine and for each ship, and measuring the expansion pressure. In consideration of the expansion pressure for each lot before charging into the coke oven, the amount of coal input for each lot is blended. The weighted average expansion pressure was obtained 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 1 to 3 mm, placing it in a crucible with a diameter of 50 mm and a height of 70 mm, adjusting the bulk density to 775 kg / m ³ , closing the lid from the top of the crucible, and using a differential pressure gauge. Insert into coal. The temperature of the crucible is raised to 1000 ° C. at 4 ° C./min, and the maximum value of the differential pressure in the temperature raising process is read.

  Generally, when the expansion pressure of blended coal is high, shrinkage during dry distillation is reduced, the gap between the furnace wall and the coke lump is reduced, and if there is a protrusion on the furnace wall, the protrusion and the coke lump come into contact with each other and lubricate extrusion. Can not be. By using the coke extrusion apparatus of the present invention, the friction between the convex portion and the coke mass is reduced, and the coke mass can be extruded without staying. The maximum value of the load-average expansion pressure of the blended coal brand that can be applied to the present invention is 9 kPa since the maximum expansion pressure of the raw coal brand is normally 9 kPa.

(C) Blending rate of high expansion pressure coal of blended coal applicable in the present invention The blended coal used in the present invention is also applied to a blending rate of high expansion pressure coal of blended coal that could not be applied conventionally is 20 mass% or more. Is possible.

Generally, when the blending ratio of high expansion pressure coal (over 2000 mmH ₂ O, over 20 kPa) in blended coal is 20 mass% or more, shrinkage during dry distillation is reduced, and the gap between the furnace wall and the coke lump is reduced. When there is a convex portion, the convex portion and the coke lump come into contact with each other, and lubrication cannot be extruded. By using the coke extrusion apparatus of the present invention, the friction between the convex portion and the coke mass is reduced, and the coke mass can be extruded without staying. In addition, the maximum value of the blending ratio of the high expansion pressure coal of the blended coal applicable to this invention is 100 mass%.

By the way, Blue Creek (USA): 68 kPa (6940 mmH ₂ O), South Yakut (Russia): 34 kPa (3453 mmH ₂ O), Norwich (Australia): 73 kPa (7450 mmH ₂ O), German Creek (Australia): 43 kPa (4420 mmH ₂ O).

  In order to investigate the effect of the present invention, an excitation experiment was performed in which the coke mass was pushed out while being vibrated.

  A small simulated coke oven 30 having a size of 1 m × 0.8 m × 0.4 m shown in FIG. 4 is charged with the coke lump 11 generated in advance in a small coke oven of the same size, and is pressed by applying force to the side wall 31. While pushing the coke lump 11 with vibration (frequency 1 to 110 Hz, acceleration level 0.3 to 12 G, sine wave) from the end face by the ram head 32, the extrusion ram driving device (hydraulic cylinder) 35 pushes out at a constant speed and pushes force ( Extrusion load) was measured. The ram head 32 is divided into extrusion surfaces 32a, 32b, and 32c, and the extrusion surface 32b (1/2 of the entire area of the extrusion surface) can be vibrated, and is vibrated from the back surface by the vibrator 33. . In addition, the vibration machine 33 used the vibration motor (The eccentric weight was rotated at high speed).

  By the way, as the excitation pattern, vibration is stopped at the start of extrusion (vibration OFF), vibration is applied after a certain period of time (vibration ON), vibration is stopped after a predetermined time (vibration OFF), and then extrusion is terminated. did.

  At that time, the pushing force was obtained by converting the signal of the load cell 34 attached to the test ram head 32 with a strain amplifier 36 and recording it with a measuring instrument (personal computer) 37. In addition, the acceleration level is the signal of the acceleration pickup (B & K Piezoelectric Charge Accelerometer model number Type 4383) 38 attached to the vibration portion (extruded surface 32b) of the test ram head 32 as a charge amplifier (B & K Charge Amplifier model number Type 2635). 39 and converted by a measuring instrument (personal computer) 37.

  5 to 8 show examples of the transition of the pushing force. The horizontal axis represents time (represents the position because the speed is constant), and the vertical axis represents the pushing force.

  In FIG. 5, the extrusion force became a substantially constant value after the extrusion was started, and the extrusion force decreased to about ½ when vibration was applied. It can be seen that when the vibration is stopped, the level has returned to the level after the start of extrusion. From this, it can be seen that the extrusion force can be reduced to about ½ by applying vibration to the coke mass. The excitation frequency at this time was 40 Hz, and the acceleration level was about 1G.

  FIG. 6 shows the case where the excitation frequency is 50 Hz and the acceleration level is about 1 G. FIG. 7 shows the case where the excitation frequency is 60 Hz and the acceleration level is about 1.5 G. The extrusion force could be reduced to about ½ by applying vibration to.

  Although not shown, when the excitation frequency was 2 Hz to 100 Hz and the acceleration level was 0.5 G to 10 G, the pushing force could be greatly reduced. In particular, when the excitation frequency was 30 Hz to 60 Hz, the pushing force was greatly reduced.

  FIG. 8 shows the case where the excitation frequency was 30 Hz and the acceleration level was about 0.2 G. However, when the acceleration level was small, the pushing force could not be reduced so much.

  In addition, even when the excitation frequency was 1 Hz and the acceleration level was about 1 G, the pushing force did not drop significantly during the process.

  In addition, although the experiment which does not give a vibration to a coke lump was also implemented as a prior art example, the pushing force did not fall significantly on the way.

  As an example of the present invention, in an actual chamber furnace 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 vibration frequency was 40 Hz and the acceleration level was 1G. The extrusion load and acceleration level were measured in the same manner as in Example 1.

  The blended coal used in Example 2 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 blending ratio of high expansion pressure coal of 17%. Met.

  On the other hand, as a conventional example, extrusion was performed under the same conditions as in the example of the present invention without imparting vibration to the coke mass as usual.

  FIG. 3 shows the extrusion load ratio (relative ratio) between the example of the present invention and the conventional example. Here, the extrusion load ratio is expressed as a relative ratio with the maximum extrusion load (peak value) of the conventional example being 1.0. As shown in FIG. 3, in the example of the present invention, the maximum value of the extrusion load ratio is significantly reduced as compared with the conventional example.

  Thereby, the effect of the present invention was confirmed.

  As an example of the present invention, extrusion was performed in an actual coke oven using the coke extrusion apparatus 20 shown in FIGS. 1 and 2 while applying vibration to the coke mass in the above-described procedure. The vibration frequency was 50 Hz and the acceleration level was 2G. The acceleration level was measured in the same manner as in Example 1.

  In Example 3, the load average volatile matter for each lot is 24% to 31%, the load average expansion pressure for each lot is 4.1 kPa to 7.2 kPa, and the blending ratio of the high expansion pressure coal is 11%. The blended coal varied in the range of ˜26% was used. At this time, the temperature at the bottom of the combustion chamber of the coke oven was 1240 ° C., and the total carbonization time was 18 to 19 hours.

  On the other hand, as a conventional example, extrusion was performed without applying vibration to the coke mass as usual. In addition, it was set as the conditions similar to the example of this invention except not giving a vibration to a coke lump.

  FIG. 9 shows the volatile matter (VM) and maximum extrusion load current ratio (relative ratio) in the case of blended coal with a load average expansion pressure of 4.5 kPa for each lot and a blending ratio of high expansion pressure coal of 15%. FIG. 10 shows the expansion pressure (kPa) of the blended coal in the case of the blended coal in which the load average volatile content for each lot is 27.3% and the blending ratio of the high expansion pressure coal is 15%. FIG. 11 shows the relationship of the maximum extrusion load current ratio (relative ratio). FIG. 11 shows the blended coal in the case where the load average volatile content for each lot is 27.3% and the load average expansion pressure for each lot is 5.1 kPa. It shows the relationship between the blending ratio of high expansion pressure coal and the maximum extrusion load current ratio (relative ratio). The maximum push load current ratio is expressed as a relative ratio with the management value (upper limit value; management level) of the maximum push load current being 1.00.

  As is apparent from FIGS. 9 to 11, in the case of the present invention example, the maximum extrusion load current ratio is at the management 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. It was never exceeded. Therefore, management of blended coal is very easy. In addition, low cost volatile coal, low volatile coal, or high expansion pressure charcoal can be used.

  On the other hand, in the case of the conventional example, the maximum extrusion load current ratio exceeded the control level unless the volatile content range of the appropriate blended coal and the blended coal with the appropriate expansion pressure or the appropriate high expansion pressure coal blending ratio were set. Therefore, it is necessary to strictly manage the volatile matter and the expansion pressure of the blended coal to be used and the blending ratio of the high-expansion pressurized coal, which increases the production cost.

It is a side view for describing one embodiment of the present invention. It is a perspective view of the coke extrusion apparatus in one embodiment of the present invention. It is a figure which shows the effect of this invention in Example 2 of this invention. It is explanatory drawing of the simulation coke oven in Example 1 of this invention. It is a figure which shows the change of the extrusion force in Example 1 of this invention. It is a figure which shows the change of the extrusion force in Example 1 of this invention. It is a figure which shows the change of the extrusion force in Example 1 of this invention. It is a figure which shows the change of the extrusion force in Example 1 of this invention. It is a figure which shows the highest extrusion load current in Example 3 of this invention. It is a figure which shows the highest extrusion load current in Example 3 of this invention. It is a figure which shows the highest extrusion load current in Example 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Carbonizing chamber of coke oven 11 Coke lump 20 Coke extrusion apparatus 21 Extrusion ram 22 Ram head 22a Upper pressing surface 22b Intermediate pressing surface 22c Lower pressing surface 23 Exciter 24 Excitation rod 30 Simulated coke oven 31 Wall 32 Ram head 32a Upper pressing surface 32b Intermediate pressing surface 32c Lower pressing surface 33 Exciter 34 Load cell 35 Hydraulic cylinder 36 Strain amplifier 37 Measuring instrument (PC)
38 Acceleration pickup 39 Charge amplifier

Claims (19)

  A coke extrusion method characterized by pressing a ram head of an extrusion device against a coke mass in a carbonization chamber of a coke oven to extrude the coke mass from the carbonization chamber while applying vibration to the coke mass.   The coke extrusion method according to claim 1, wherein vibration is applied to the coke mass when the extrusion load is a predetermined value or more.   2. The coke extrusion method according to claim 1, wherein vibration is applied to the coke lump when the moving distance of the ram head from the extrusion start position is within a predetermined range.   The coke extrusion method according to any one of claims 1 to 3, wherein the vibration is applied by vibrating a ram head.   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 vibration including at least an extrusion direction component is applied as the vibration direction.   The coke extrusion method according to any one of claims 1 to 6, wherein vibration including one or more types of frequency components of 2 Hz to 100 Hz is applied.   The coke extrusion method according to any one of claims 1 to 7, wherein a vibration having a waveform including one or more types of sine waves is applied.   The coke extrusion method according to any one of claims 1 to 8, wherein a vibration having a vibration level of an acceleration level of 0.5G to 10G is applied.   A coke extrusion device that pushes a ram head against a coke mass in a carbonization chamber of a coke oven and pushes the coke mass out of the carbonization chamber, and includes a ram head vibration means for vibrating the ram head. .   11. The coke pushing apparatus according to claim 10, wherein the ram head is divided into a plurality of parts in the vertical direction, and the ram head vibrating means vibrates at least one of them.   The coke extrusion apparatus according to claim 10 or 11, wherein the ram head is vibrated including at least an extrusion direction component as a vibration direction.   The coke extrusion apparatus according to any one of claims 10 to 12, wherein the ram head is vibrated by containing one or more frequency components of 2 Hz to 100 Hz.   The coke extrusion device according to any one of claims 10 to 13, wherein the ram head is vibrated with a waveform including one or more types of sine waves.   The coke extrusion apparatus according to any one of claims 10 to 14, wherein the ram head is vibrated at an acceleration level of 0.5G to 10G.   The blended coal is charged into the coke oven to produce coke, and when the coke mass is pushed out from the carbonization chamber by pushing the ram head of the extrusion device against the coke mass in the carbonization chamber of the coke oven, vibration is imparted to the coke mass. Coke production method characterized by extruding while pushing.   The coke production method according to claim 16, wherein the load average volatile content of the lot of blended coal used is 29 mass% or more or 25 mass% or less.   The coke manufacturing method according to claim 16 or 17, wherein a load average expansion pressure of a lot of blended coal used is 6 kPa or more.   The coke manufacturing method according to any one of claims 16 to 18, wherein a blended coal having an expansion pressure of 20 kPa or more is 20 mass% or more.

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