JP6206095B2 - Repair method of hole breakage in coke oven carbonization chamber - Google Patents

Description

  The present invention relates to a method for repairing a broken hole portion in a coke oven carbonization chamber that repairs a broken hole portion formed so as to penetrate from the carbonization chamber to the combustion chamber in a furnace wall that separates the carbonization chamber and the combustion chamber of the coke oven. It is about.

In a coke oven that heats coal to generate coke, for example, as shown in Patent Document 1, a plurality of carbonization chambers and combustion chambers are alternately arranged and charged into the carbonization chamber. Coke is produced by dry distillation of coal with heat from the combustion chamber. And the coke in a carbonization chamber is extruded by the extrusion ram of a coke extruder.
The carbonization chamber of the coke oven has a short distance between the opposing furnace walls (the furnace width is narrow) so that the coal can be efficiently carbonized by the heat of the combustion chamber. Moreover, in order to charge a relatively large amount of coal, the depth of the furnace is set to be relatively long. Further, since the extrusion ram of the coke extruder is inserted, the opposing furnace walls extend substantially in parallel.

  In the carbonization chamber of a coke oven used at high temperatures, the furnace wall is composed of a refractory material such as refractory bricks. This refractory is known to deteriorate due to heat load, chemical load, mechanical load and the like. For example, a part of the furnace wall is altered by being held at a high temperature of 1000 ° C. or higher for a long time, or the furnace wall is eroded by the volatile components of the coal charged in the furnace. The furnace wall is damaged by the impact, and the furnace wall (refractory) is deteriorated.

Here, when a concave portion is formed on the furnace wall surface of the carbonization chamber, for example, as described in Patent Documents 2 and 3, it is possible to repair by spraying a thermal spray material (refractory) with a burner. Is possible.
On the other hand, if a pierced hole that penetrates from the carbonization chamber to the combustion chamber is formed on the furnace wall of the carbonization chamber, the sprayed material blows out to the combustion chamber side even if the thermal spray material is sprayed, and the pierced hole It was difficult to repair so as to close the part.

  Therefore, as a method of repairing the broken hole portion penetrating from the carbonization chamber to the combustion chamber, for example, as shown in Patent Documents 4 and 5, the refractory brick is shaped into a shape corresponding to the broken hole portion, A method has been proposed in which a refractory brick is fitted into the hole and a thermal spray material is sprayed around the refractory brick. In these Patent Documents 4 and 5, the shape measuring means for measuring the shape of the broken hole portion, the manipulator for operating the shaped refractory brick, and the thermal spray material are sprayed around the refractory brick fitted into the broken hole portion. A furnace wall repair device provided with a thermal spray burner is used.

JP 2009-249453 A Japanese Patent Laid-Open No. 2000-212566 JP 2004-277527 A JP 2008-143966 A JP 2008-202004 A

Recently, in order to efficiently produce coke, it is required to shorten the coke oven repair time as much as possible.
Here, the methods described in Patent Documents 4 and 5 have a problem that it is necessary to shape the refractory brick so as to be fitted into the hole portion, and it takes time for repair.
Further, depending on the accuracy of the shaping process, there is a possibility that the refractory brick cannot be fitted into the hole. In particular, when a broken hole is formed at the center of the carbonization chamber in the extending direction (the central part of the coke extrusion direction), the manipulator is difficult to operate because the furnace width is narrow, and a refractory brick is fitted into the broken hole. It was very difficult to install.
As described above, in the conventional method, it is difficult to repair the broken hole portion penetrating from the carbonization chamber to the combustion chamber with high accuracy in a short time.

  The present invention has been made in view of the above-described situation, and is a coke oven carbonization capable of repairing a broken hole portion penetrating from a carbonization chamber to a combustion chamber with a short time and a relatively simple operation with high accuracy. It aims at providing the repair method of the broken hole part of a chamber.

In order to solve the above-mentioned problem, a repair method for a broken hole portion of a coke oven carbonization chamber according to the present invention is a method of penetrating the combustion chamber from the carbonization chamber formed in the furnace wall separating the carbonization chamber and the combustion chamber of the coke oven. A method for repairing a broken hole portion of a coke oven carbonizing chamber for repairing a broken hole portion to be directed toward a region on the combustion chamber side of the inner peripheral surface of the broken hole portion by a thermal spray burner inserted from the carbonized chamber. A depositing part forming step of spraying a thermal spraying material to form a buildup part, and further spraying the spraying material toward the buildup part, laminating the sprayed material, and the combustion chamber side of the broken hole part A thermal spray material laminating step for forming a laminate of the thermal spray material in the region, and a thermal spray material for spraying the thermal spray material toward the multilayer body and filling the thermal spray material in a region on the carbonization chamber side of the hole portion and and a filling step, in the overlaid portion forming step, the thermal spraying burner in a horizontal plane And the inclination angle of the thermal spray burner with respect to the horizontal plane is within a range of 20 ° to 0 ° in the build-up portion forming step, the thermal spray material laminating step, and the thermal spray material filling step. It is characterized by being made smaller in stages .

In the repair method of the hole portion of the coke oven carbonization chamber having this structure, the thermal spray material is sprayed toward the region on the combustion chamber side of the inner peripheral surface of the hole portion by a thermal spray burner inserted from the carbonization chamber. Since there is a build-up part forming step for forming the build-up part, the sprayed material is surely deposited on the inner peripheral surface of the broken hole part without forming the build-up part without blowing the sprayed material to the combustion chamber side. Can do.
In addition, since the thermal spray material is further sprayed toward the build-up portion, the thermal spray material is laminated, and the thermal spray material laminating step for forming the thermal spray material laminate in the combustion chamber side region of the broken hole portion is provided. The spraying material is prevented from blowing through to the combustion chamber side, and by stacking the spraying material, the region on the combustion chamber side of the hole portion can be closed.
And since the thermal spray material is sprayed toward the laminate and the thermal spray material filling step of filling the thermal spray material in the region on the carbonization chamber side of the hole portion is provided, it is suppressed that the thermal spray material blows through to the combustion chamber side. In addition, the entire hole portion can be closed by the thermal spray material, and the hole portion can be repaired reliably.
Thus, in the repair method of the broken hole part of the coke oven carbonization chamber of the present invention. Since the hole is repaired only by spraying the thermal spray material with the thermal spray burner inserted from the carbonization chamber, the work for shaping the firebrick and the work for fitting the shaped firebrick into the hole are performed. There is no need. Therefore, it is possible to repair the broken hole portion in a short time and with a relatively simple operation.

Here, in the repair method of the broken hole portion of the coke oven carbonization chamber of the present invention, in the build-up portion forming step, the thermal spray burner is arranged downward with respect to a horizontal plane, and the horizontal plane of the thermal spray burner is angle of inclination, the overlaid portion forming step for the thermal spraying material layering step, in the thermal spraying material filling process, are reduced stepwise in the range of 20 ° ~0 °, in the overlaid portion forming step, Since the angle of inclination of the thermal spray burner arranged downward with respect to the horizontal plane is increased, the sprayed material does not blow through the combustion chamber side, and the region on the combustion chamber side of the inner peripheral surface of the broken hole portion The overlaying part can be formed by spraying the thermal spray material.
Further, in the thermal spray material laminating step, the thermal spray material is laminated on the overlay portion without blowing the thermal spray material to the combustion chamber side by making the inclination angle of the thermal spray burner smaller than in the overlay portion forming step. Thus, a laminate can be formed.
Furthermore, in the spraying material filling step, the area on the combustion chamber side of the hole portion is blocked by the laminate, so that the spraying material is not blown into the combustion chamber side even when the inclination angle of the spraying burner is set to 0 °. Instead, it is possible to reliably repair the broken hole portion by filling the area on the carbonization chamber side of the broken hole portion with the thermal spray material.
Thus, by changing the inclination angle of the thermal spray burner stepwise, the build-up portion forming step, the thermal spray material laminating step, and the thermal spray material filling step can be reliably performed, and a relatively simple operation. Can repair the hole.

Moreover, in the repair method of the broken hole part of the coke oven carbonization chamber of the present invention, the build-up part forming step, the thermal spray material laminating step, and the thermal spray material filling step may be performed under hot conditions of 700 ° C. or higher. preferable.
Since the refractory brick constituting the furnace wall of the carbonization chamber has the property that the coefficient of thermal expansion changes abruptly at around 600 ° C. and is susceptible to thermal shock, the repair is performed at 700 ° C. or higher. The load on the wall can be reduced and the life of the carbonization chamber can be extended.

Moreover, in the repair method of the broken hole part of the coke oven carbonization chamber of this invention, in the said build-up part formation process, the thickness D of the said broken hole part and the said combustion chamber side of the area | region in which the said build-up part is formed It is preferable that the ratio d / D with respect to the position d from is within the range of d / D ≦ 0.2.
In this case, it is possible to reliably spray the sprayed material on the combustion chamber side region on the inner peripheral surface of the broken hole portion to form the built-up portion.

  As described above, according to the present invention, the broken hole portion of the coke oven carbonization chamber capable of repairing the broken hole portion penetrating from the carbonization chamber to the combustion chamber with a short time and a relatively simple operation with high accuracy. A repair method can be provided.

It is a schematic explanatory drawing of the coke oven in which the repair method of the broken hole part of the coke oven carbonization chamber which is one Embodiment of this invention is used. It is a partially expanded explanatory view of the carbonization chamber in the coke oven shown in FIG. It is explanatory drawing of the broken-hole part formed in the furnace wall of the carbonization chamber shown in FIG. It is a schematic explanatory drawing which shows an example of the furnace wall repair apparatus which enforces the repair method of the broken hole part of the coke oven carbonization chamber which is one Embodiment of this invention. It is a schematic explanatory drawing of the repair method of the broken hole part of the coke oven carbonization chamber which is one Embodiment of this invention. It is explanatory drawing which shows the thermal spraying position in an overlaying part formation process.

Below, the repair method of the broken hole part of the coke oven carbonization chamber which is one Embodiment of this invention is demonstrated with reference to attached drawing. In addition, this invention is not limited to the following embodiment.
First, the coke oven 1 to which the repairing method of the broken hole portion of the coke oven carbonization chamber according to this embodiment is applied will be described.
As shown in FIG. 1, the coke oven 1 includes a plurality of carbonization chambers 10 arranged in parallel, and a combustion chamber 13 is disposed between two adjacent carbonization chambers 10 as shown in FIG. 2. Yes.
As shown in FIG. 1, the carbonization chamber 10 extends in one direction (left-right direction in FIG. 1) when viewed from above, a rising pipe 16 is disposed at one end, and a stand pipe 17 is disposed at the other end. It is arranged. A plurality of insertion holes 18 are formed between the rising pipe 16 and the stand pipe 17.

  A first rail 21 is disposed above the plurality of carbonization chambers 10 arranged in parallel so as to extend in the parallel direction of the carbonization chambers 10. A coal charging vehicle 31 is placed on the first rail 21. The coal charging vehicle 31 is configured to move along the first rail 21. The coal charging vehicle 31 includes a jumper pipe 32 connected to the stand pipe 17 of the carbonization chamber 10. As shown in FIG. 1, this jumper pipe 32 is configured to connect a carbonization chamber 10 (charging furnace 10a) for charging coal and a carbonizing chamber 10 (adjacent kiln 10b) adjacent to the charging furnace 10a. Has been.

  Further, the second rail 22 is arranged on one end side (left side in FIG. 1) in the extending direction of the carbonizing chamber 10 so as to extend in the parallel direction of the carbonizing chamber 10. A coke extruder 40 is placed on the second rail 22. The coke extruder 40 is configured to move along the second rail 22.

  Further, the third rail 23 and the fourth rail 24 are arranged on the other end side in the extending direction of the carbonizing chamber 10 (on the right side in FIG. 1) so as to extend in the parallel direction of the carbonizing chamber 10. Yes. A coke guide wheel 35 is placed on the third rail 23, and a fire extinguishing wheel 37 is placed on the fourth rail 24. The coke guide wheel 35 is configured to move along the third rail 23, and the fire extinguishing vehicle 37 is configured to move along the fourth rail 24.

Next, an embodiment of a method for operating the coke oven 1 configured as described above will be described.
First, coal is charged into the carbonization chamber 10 (charging furnace 10a) of the coke oven 1. The coal charging vehicle 31 is moved to the top of the charging furnace 10a, the lids of the stand pipes 17 of the charging furnace 10a and the adjacent kiln 10b are opened, the jumper pipe 32 is connected, and each of the charging furnaces 10a is connected. The lid of the charging hole 18 is opened, and coal is charged into the charging furnace 10a.

  After the coal charging is completed, the coal is carbonized in the carbonization chamber 10. In this embodiment, as shown in FIG. 2, a pair of furnace walls of the carbonization chamber 10 is used to efficiently transfer heat from the combustion chambers 13 provided between the parallel carbonization chambers 10 to the coal. 11, 11 (the furnace wall located on the combustion chamber 13 side) is relatively short. That is, the furnace width of the carbonization chamber 10 is narrowed.

  When the dry distillation of coal is completed, the coke C in the carbonization chamber 10c is discharged using the coke extruder 40. As shown in FIG. 1, the coke extruder 40 on the second rail 22 is moved to one end side of the carbonizing chamber 10 c that discharges the coke C. On the other hand, the coke guide wheel 35 on the third rail 23 and the fire extinguisher 37 on the fourth rail 24 are moved to the other end side of the carbonizing chamber 10c for discharging the coke C.

  Then, an extrusion ram 43 of the coke extruder 40 is inserted from one end side of the carbonization chamber 10 (left side in FIG. 1), and the coke C in the carbonization chamber 10 is disposed at the other end side of the carbonization chamber 10. It is discharged to a fire extinguisher 37 through 35. In this way, coke C is produced.

Here, as shown in FIG. 2, when coke C filled in the carbonization chamber 10 is extruded by the coke extruder 40, pressure also acts on the furnace wall 11 of the carbonization chamber 10 via the coke C. It will be. At this time, a part of the refractory bricks constituting the furnace wall 11 collapses to the combustion chamber 13 side, and as shown in FIGS. 2 and 3, there is a broken hole portion 12 penetrating from the carbonization chamber 10 to the combustion chamber 13. Sometimes formed.
The repair method for the broken hole portion of the coke oven carbonization chamber according to this embodiment is applied when repairing the broken hole portion 12 penetrating from the carbonization chamber 10 to the combustion chamber 13.

Next, an example of a furnace wall repairing apparatus 50 that implements the method for repairing a broken hole portion of a coke oven carbonization chamber according to this embodiment will be described with reference to FIG.
As shown in FIG. 4, the furnace wall repairing apparatus 50 includes a base portion 51 placed on the second rail 22, the third rail 23, or the fourth rail 24, and a front-rear direction (carbonization) on the base portion 51. A carriage 52 arranged to be movable in the extending direction of the chamber 10 and a driving means 53 for inserting the carriage 52 into the carbonization chamber 10 are provided.
A leg portion 55 and a pedestal portion 57 disposed on the leg portion 55 are provided at the tip of the carriage 52, and the diagnostic repair machine 60 is disposed on the pedestal portion 57.

This diagnostic repair machine 60 includes a main body portion 61, an arm portion 62 provided at the front end of the main body portion 61, a block portion 63 provided at the front end of the arm portion 62, and a thermal spray burner 64 disposed in the block portion 63. And a shape measuring means 65.
The 1st joint part 67 is provided between the main-body part 61 and the base part 57, and the main-body part 61 can move to the front-back direction (extension direction of the carbonization chamber 10) with respect to the base part 57, and Has been.
In addition, a second joint portion 68 is provided between the main body portion 61 and the arm portion 62, and the arm portion 62 can swing in the vertical direction with respect to the main body portion 61.
Further, a third joint portion 69 is provided between the arm portion 62 and the block portion 63 so that the block portion 63 can swing in the left-right direction with respect to the arm portion 62.

Next, the repair method of the broken hole part of the coke oven carbonization chamber which is this embodiment is demonstrated with reference to FIG.4, FIG.5 and FIG.6. Here, all the repair methods for the broken hole portion of the coke oven carbonization chamber described below are performed under hot conditions of 700 ° C. or higher.
First, as shown in FIG. 4, the carriage 52 of the furnace wall repair device 50 is inserted into the carbonization chamber 10 by the driving means 53, and the diagnostic repair machine 60 is disposed at the position where the broken hole portion 12 is formed. The base portion 57 is fixed by the portion 55.

Next, the block part 63 is rotated in the left-right direction by the third joint part 69, and the thermal spray burner 64 and the shape measuring means 65 are arranged so as to face the furnace wall 11. Then, the shape of the hole 12 is measured by the shape measuring means 65. At this time, the position of the shape measuring means 65 with respect to the broken hole portion 12 is finely adjusted by the first joint portion 67 and the second joint portion 68, and the shape of the entire broken hole portion 12 is measured.
After the shape of the hole 12 is measured, the thermal spray material is sprayed by the thermal spray burner 64 to repair the hole 12.

Here, when the hole 12 is repaired by the thermal spray burner 64, first, as shown in FIG. 5A, the thermal spray burner 64 causes the combustion chamber 13 side of the inner peripheral surface of the hole 12 to be repaired. The thermal spray material is sprayed toward the lower region to form the built-up portion 71 (built-up portion forming step).
In this build-up portion forming step, as shown in FIG. 6, the ratio d / D between the thickness D of the broken hole portion 12 and the position d from the combustion chamber 13 side in the region where the build-up portion 71 is formed. The thermal spray burner 64 is disposed downward with respect to the horizontal plane so that d / D ≦ 0.2. In this embodiment, the inclination angle θ of the thermal spray burner 64 is set to 20 °.

Next, as shown in FIGS. 5 (b) and 5 (c), a thermal spray material is further sprayed on the build-up portion 71, and a laminate of the thermal spray material is formed in the region on the combustion chamber 13 side of the broken hole portion 12. 72 is formed (spraying material laminating step).
In this thermal spray material laminating step, first, as shown in FIG. 5 (b), the thermal spray burner 64 is arranged downward with respect to the horizontal plane, and the inclination angle θ of the thermal spray burner 64 is set to the build-up portion forming step. Similarly, it is set to 20 °. In the second half of the thermal spray material laminating step, as shown in FIG. 5C, the inclination angle θ of the thermal spray burner 64 is set to be smaller than 20 °, specifically set to about 10 °. . Thereby, it becomes possible to form the laminated body 72 so that the thermal spray material is laminated also on the upper part of the broken hole part 12 and the broken hole part 12 is closed.

And as shown in FIG.5 (d), a thermal spray material is further sprayed toward the formed laminated body 72, and the area | region by the side of the carbonization chamber 10 of the torn part 12 is filled with a thermal spray material (spraying material filling process). ).
In this spraying material filling process, as shown in FIG. 5D, the spraying burner 64 has an inclination angle θ of 0 ° (that is, the spraying burner 64 is horizontal) and is perpendicular to the furnace wall 11. It is configured to spray. Thereby, it becomes possible to finish a repair surface smoothly, and in this embodiment, for example, it becomes possible to repair the broken hole part 12 with an accuracy of ± 15 mm or less with respect to a healthy surface other than the repair surface.

In general, the spraying material used for repairing the furnace wall 11 of the carbonization chamber 10 is about 70 mass% for silica, about 15 mass% for metallic silicon, 7 mass% or less for aluminum oxide, 3 mass% or less for magnesium oxide, and calcium oxide. So-called thermite material containing 2 mass% or less is used.
In this embodiment, since it repairs so that the torn part 12 may be plugged up with a thermal spray material, higher intensity | strength is requested | required than the above-mentioned thermite material. Therefore, in the present embodiment, a thermal spray material containing silica (SiO ₂ ) of 90 mass% or more and calcium oxide of 5 mass% or less is applied.

  In the repair method of the broken hole portion of the coke oven carbonization chamber, which is the present embodiment configured as described above, it is inserted from the carbonization chamber 10, a build-up portion forming step, a thermal spray material laminating step, and a thermal spray material filling step. Since the hole 12 is repaired only by the thermal spraying of the thermal spray material by the thermal spray burner 64, the work of shaping the refractory brick and the work of fitting the shaped refractory brick into the hole are performed as in the prior art. There is no need to repair the broken hole portion 12 in a short time and with a relatively simple operation. Therefore, it is not necessary to stop the operation of the coke oven 1 for a long time, and the operating efficiency of the coke oven 1 can be greatly improved.

  Moreover, in the repair method of the broken hole part of the coke oven carbonization chamber which is this embodiment, as a structure which implements a build-up part formation process, a thermal spray material lamination process, and a thermal spray material filling process on the hot conditions of 700 degreeC or more. Therefore, it is possible to suppress a large change in the coefficient of thermal expansion of the refractory bricks constituting the furnace wall 11, to reduce the thermal strain applied to the entire furnace wall 11, and to extend the furnace life. .

  Furthermore, in the method for repairing a broken hole portion of a coke oven carbonization chamber according to this embodiment, in the build-up portion forming step, the combustion chamber 13 in the region where the thickness D of the broken hole portion 12 and the built-up portion 71 are formed. Since the ratio d / D with respect to the position d from the side is in the range of d / D ≦ 0.2, the sprayed material does not blow through the combustion chamber 13 side, so that the inner peripheral surface of the hole 12 is It is possible to reliably spray the spray material in the region on the combustion chamber 13 side to form the built-up portion 71.

Moreover, in the repair method of the broken hole portion of the coke oven carbonization chamber according to the present embodiment, the inclination angle θ of the thermal spray burner 64 disposed downward with respect to the horizontal plane is set to 20 ° in the build-up portion forming step. Since the thermal spray material is set, the thermal spray material is sprayed toward the lower region on the combustion chamber 13 side of the inner peripheral surface of the broken hole portion 12 without blowing the thermal spray material to the combustion chamber 13 side, thereby forming the cladding portion 71. can do.
In the first half of the thermal spray material laminating process, the inclination angle θ of the thermal spray burner 64 is set to 20 °, and in the latter half of the thermal spray material laminating process, the inclination angle θ of the thermal spray burner 64 is set to 10 °. The laminate 72 can be formed by laminating the thermal spray material so as to close the hole 12.
In the thermal spray material filling step, the thermal spray material is sprayed perpendicularly to the furnace wall 11 with the inclination angle θ of the thermal spray burner 64 being set to 0 °. Thus, it is possible to reliably repair the broken hole portion 12. In addition, it is possible to repair the broken hole portion 12 with an accuracy of ± 15 mm or less with respect to a sound surface other than the repair surface.

Furthermore, in the repair method of the broken hole portion of the coke oven carbonization chamber according to the present embodiment, as the thermal spray material, silica (SiO ₂ ) containing 90 mass% or more and calcium oxide containing 5 mass% or less is used. The strength of the repaired area can be ensured, and the life of the furnace wall 11 can be extended.

As mentioned above, although the repair method of the broken hole part of the coke oven carbonization chamber which is the embodiment of the present invention has been described, the present invention is not limited to this, and is appropriately changed without departing from the technical idea of the present invention. Is possible.
For example, the furnace wall repairing device is not limited to the one exemplified in this embodiment, and a furnace wall repairing device having another configuration may be used.

  Moreover, about the structure of a carbonization chamber, etc., it is not limited to what was illustrated by this embodiment. For example, although the present embodiment has been described as including the stand pipe 17 of the carbonization chamber 10 and the jumper pipe 32 of the coal charging vehicle 31, the present invention is also effective in a coke oven that does not include these.

Furthermore, the material of the thermal spray material is not limited to those exemplified in the present embodiment, and other thermal spray materials may be used.
Further, the inclination angle θ of the thermal spray burner is not limited to that exemplified in the present embodiment, and is appropriately determined in consideration of the thickness of the furnace wall, the width of the carbonization chamber, the size of the hole portion, and the like. You only have to set it.

DESCRIPTION OF SYMBOLS 1 Coke oven 10 Carbonization chamber 11 Furnace wall 12 Broken hole part 13 Combustion chamber 64 Thermal spray burner 70 Thermal spray material 71 Overlay part 72 Laminate

Claims (3)

A method of repairing a broken hole portion of a coke oven carbonization chamber for repairing a broken hole portion penetrating from the carbonization chamber generated in the furnace wall separating the carbonization chamber and the combustion chamber of the coke oven to the combustion chamber,
By a thermal spray burner inserted from the carbonization chamber, a build-up portion forming step of forming a build-up portion by spraying a thermal spray material toward a region on the combustion chamber side of the inner peripheral surface of the broken hole portion;
A thermal spray material laminating step in which a thermal spray material is further sprayed toward the build-up portion to laminate the thermal spray material, and a laminate of the thermal spray material is formed in the combustion chamber side region of the broken hole portion;
Spraying a thermal spray material toward the laminate, and a thermal spray material filling step of filling the thermal spray material in a region on the carbonization chamber side of the hole portion,
Equipped with a,
In the build-up part forming step, the thermal spray burner is arranged downward with respect to a horizontal plane,
An inclination angle of the thermal spray burner with respect to the horizontal plane is gradually reduced within a range of 20 ° to 0 ° in the build-up portion forming step, the thermal spray material laminating step, and the thermal spray material filling step. A method for repairing the hole in the coking oven carbonization chamber. 2. The coking oven carbonization chamber according to claim 1 , wherein the build-up portion forming step, the thermal spray material laminating step, and the thermal spray material filling step are performed under hot conditions of 700 ° C. or higher. Repair method. In the build-up portion forming step, a ratio d / D between the thickness D of the hole-piercing portion and the position d from the combustion chamber side of the region where the build-up portion is formed is d / D ≦ 0. The method for repairing a broken hole portion in a coke oven carbonization chamber according to claim 1 or 2, wherein the repaired portion is within a range of 2 .

Images