JP6137094B2 - Repair method around the coke oven flue hole - Google Patents

Description

The present invention relates to a repairing method around a flue hole of a coke oven.

  The coke oven is mainly composed of a carbonization chamber, a combustion chamber, and a heat storage chamber, a heat storage chamber is provided in the lower part of the furnace body, and a plurality of carbonization chambers and combustion chambers are provided alternately in the upper part of the furnace body. A flue hole for inspecting the inside of the combustion chamber is provided on the upper side which is the furnace top side of the combustion chamber. At the top of the coke oven, a charcoal vehicle capable of traveling in parallel with the direction in which the carbonization chamber and the combustion chamber are adjacent to each other is provided, and coal is input from the coal vehicle into the carbonization chamber. In the combustion chamber, the air heated in the heat storage chamber and combustion gas such as coke oven gas or mixed gas are burned to indirectly heat the coal in the carbonization chamber. The heated coal is coke by being dry-distilled by heat from the combustion chamber. The produced coke is extruded out of the furnace by an extruder and cooled.

Since the refractory forming such a coke oven is subjected to a rapid temperature change or mechanical shock when coal is charged or coke is pushed out, periodic repairs are required. At this time, the repair is performed in a state in which the coke oven is not cooled immediately after the operation, so that the repair time can be reduced and the cooling damage of the non-repair brick can be reduced.
For example, Patent Document 1 discloses a furnace body upper support device that can be used in a temperature range of about 600 to 500 ° C. and used when repairing bricks in the upper part of the furnace body.

Japanese Utility Model Publication No. 61-125146

By the way, on the top of the coke oven, a traveling rail of the coal-equipped vehicle and a sleeper (sleeper) for supporting the traveling rail are provided around the flue hole. Since the top bricks around the sleeper are loaded with coal, they are more likely to be damaged than other bricks and require partial repair. At this time, the technique disclosed in Patent Document 1 cannot partially repair such a top brick.
Moreover, in such partial repair of the top brick, repair is performed in a state where combustion gas is being burned in the combustion chamber in order to prevent cooling damage of the non-repair brick. When repairs are performed in such a state, flames may be ejected from the flue holes during the repair, making repair work very difficult.

Therefore, the present invention has been made paying attention to the unsolved problems of the above-described conventional example, and when repairing a furnace-top brick including a flue hole, coke capable of ensuring the safety of repair work. The purpose is to provide a repair method around the furnace flue hole .

A repair method around a flue hole of a coke oven according to an aspect of the present invention includes a pipe portion having a smaller outer diameter than the flue hole provided at the top of the coke oven and the flue provided over the outer periphery of the pipe portion. A flue hole frame having a flange portion having an outer diameter larger than the hole, a part of the tube portion of the flue hole frame is inserted into the flue hole, and the flange portion of the flue hole frame is inserted into the top of the flue hole furnace. Temporary lid installation step of installing the flue hole temporary lid on the upper part of the flue hole frame so as to cover the flue hole on which the flue hole frame is installed by being hooked on the upper part of the side And a repairing step of repairing the furnace top brick including the flue hole in a state where the flue hole temporary lid is provided. Thus, by providing the flue hole frame and the flue hole temporary lid before the repair step, it is possible to prevent a flame from being ejected from the flue hole when repairing the furnace top brick. Work safety can be ensured.

Further, in the repairing method around the flue hole of the coke oven, the furnace top mortar used for the repair is poured into a position lower than the upper end portion of the flue hole frame in the repairing process, and then further fixed. It may be poured into the furnace top and hardened. Thus, by pouring the mortar separately, the mortar can be prevented from flowing into the flue hole.
Further, in the above-described repair method around the flue hole of the coke oven , the flue hole temporary lid includes a lid member composed of a tube portion, a bottom surface portion, and a flange portion, and heat insulation fixed to a lower portion of the bottom surface portion of the lid member. In the temporary lid installation step, the heat insulating material and the tube portion and bottom surface portion of the flue hole temporary lid are inserted into the flue hole frame, and the flange portion of the flue hole temporary lid is The flue hole temporary lid may be installed on the flue hole frame by being hooked on the upper part of the flue hole frame. Thus, by providing the heat insulating material, the temperature of the upper part of the flue hole frame can be lowered.

Moreover, in the repair method around the flue hole of the coke oven, the temporary cover of the flue hole may be removed from the flue hole frame after the repair step.
Further, in the above repair method around the flue hole of the coke oven, the flue hole temporary lid has a handle portion, and a detachable jig is attached to the handle portion when the flue hole temporary lid is detached. May be. Thus, by using the attachment / detachment jig, the above-mentioned flew hole temporary lid can be safely attached and detached.

Further, in the above-described repair method around the flue hole of the coke oven , a sleeper is provided around the flue hole to be repaired, and the repair process includes a repair process of bricks and mortar around the sleeper, or the above It may be a repair process when the sleeper is replaced. Thus, by performing the work in a state in which flame ejection from the flue hole is prevented, the positioning accuracy when the sleeper is installed can be improved.

According to the repair method around the flue hole of the coke oven according to the present invention, it is possible to ensure the safety of the repair work when repairing the furnace top brick including the flue hole.

It is a partial top view of a coke oven furnace top. It is the II sectional view taken on the line of FIG. It is a fragmentary sectional view which shows the state in which the flue hole frame was provided in the temporary lid installation process of the furnace top brick repair method which concerns on one Embodiment of this invention. It is the top view and side view of a flue hole frame. It is a fragmentary sectional view of a flue hole frame. It is a fragmentary sectional view which shows the state in which the flue hole temporary cover was provided in the temporary cover installation process of the furnace top brick repair method which concerns on this embodiment. It is the top view, side view, and bottom view which show a flew hole temporary cover. It is the II-II sectional view taken on the line of FIG. It is a fragmentary sectional view which shows the state in which the sleeper and the tie rod were provided in the repair process of the furnace top brick repair method which concerns on this embodiment. It is a fragmentary sectional view which shows the state by which the top mortar was poured in to the position lower than a flue hole frame in the repair process of the top brick repair method which concerns on this embodiment. It is a fragmentary sectional view showing the state where the furnace top mortar was poured into the furnace top in the repair process of the furnace top brick repair method according to the present embodiment. In the furnace top brick repair method which concerns on this embodiment, it is a fragmentary sectional view which shows the state which removed the flue hole temporary cover after the repair process.

DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings.
<1. Coke oven top configuration>
First, the configuration of the coke oven top will be described with reference to FIGS. 1 and 2. The coke oven shown in FIG. 1 and FIG. 2 is in a state where the top brick is repaired without using the top brick repair method according to the present embodiment, or in a newly built state. On the upper side of the coke oven that is in the positive z-axis direction, the carbonization chamber 4, the combustion chamber (not shown), and the flue holes 3 provided on the upper side of the combustion chamber are provided alternately. A plurality of the flew holes 3 are provided in the y-axis direction at a predetermined interval above each combustion chamber extending in the y-axis direction.

  The carbonization chamber 4 is formed of a carbonization chamber brick 42 made of a plurality of regular refractories. The flue hole 3 is formed by a plurality of flue hole bricks 32 provided on the upper side of the combustion chamber, and the sleeper 10 is provided on the upper side of the flue hole brick 32 in the flue hole 3 in the vicinity of the coal-car running rail 20. When the coke oven is in operation, a detachable flue hole lid (not shown) is provided at the upper end of the flue hole 3.

The flue hole brick 32 is joined to another flue hole brick 32 or the adjacent carbonization chamber brick 42 by mortar. The sleeper 10 has an upper surface having a horizontal flat portion, a cylindrical portion communicating with two flue holes 3 located on both sides of the later-described charcoal vehicle traveling rail 20, and a lower portion extending outward in the horizontal direction. This is an iron casting having an extension 102. The sleeper 10 is fixed to the furnace top side of the two flew holes 3 positioned on both sides of the coal-car running rail 20 by the furnace top mortar 16. In addition, a tie rod 14 extending in the y-axis direction may be provided in the furnace top mortar 16 to ensure the strength of the coke oven.
A sleeper upper plate 12 is provided on the upper side of the sleeper 10. The sleeper upper plate 12 is located between two flue holes on the upper surface of the sleeper, and is composed of a plurality of rectangular metal plates whose both ends are cut out in accordance with the shape of the flue hole, and directly supports the traveling beam 22 provided on the upper side. To do.

The traveling girder 22 extends over substantially the entire length of the coke oven in the x-axis direction and is bridged to the sleeper 10. Two traveling girders 22 are provided at a predetermined interval in the y-axis direction. On the upper side of the two traveling girders 22, a charcoal vehicle traveling rail 20 is provided.
Similarly to the traveling beam 22, the charcoal vehicle traveling rail 20 extends over substantially the entire length of the coke oven in the x-axis direction and is fixed to the traveling beam 22. The charcoal vehicle is provided on the charcoal vehicle traveling rail 20.

  In the coke oven having such a configuration, the load of the charcoal vehicle is applied to the furnace top bricks such as the furnace top mortar 16, the flue hole brick 32, and the coking chamber brick 42 through the sleeper upper plate 12 and the sleeper 10 having a small pressure receiving area. Take it. At this time, the furnace top mortar 16 that is in contact with the sleeper 10 and the surrounding carbonization chamber brick 42 and the flue hole brick 32 are more likely to be damaged due to large surface pressure, and therefore more frequently than other bricks. It needs to be repaired. For this reason, in the coke oven having such a configuration, only partial repair of the top brick may be performed.

<2. Furnace top brick repair method>
Next, with reference to FIGS. 3-12, the furnace brick repair method which concerns on one Embodiment of this invention is demonstrated.
[2-1. Temporary lid installation process]
In the furnace top brick repair method according to the present embodiment, the furnace top mortar 16 is repaired as a partial repair of the furnace top brick. In the furnace top brick repair method according to the present embodiment, first, the flue hole frame 5 and the flue hole temporary lid 6 are installed in the flue hole 3 (temporary lid installation step). Prior to the temporary lid installation step, the sleeper 10, the sleeper upper plate 12, the tie rod 14, and the furnace top mortar 16 of the flue hole 3 to be repaired are removed.

  Next, as shown in FIG. 3, the flue hole frame 5 is installed in the flue hole 3 formed by the uppermost flue hole brick 32. As shown in FIGS. 4 and 5, the flew hole frame 5 includes a cylindrical tube portion 52 and a flange portion 54 provided over the outer periphery of the tube portion 52. The outer diameter of the tube part 52 is formed smaller than the flew hole 3. The flange portion 54 is a disk-like member provided on one end side of the center of the tube portion 52 so as to protrude outward in the radial direction of the tube portion 52, and has an outer diameter larger than that of the flew hole 3. Is done. When installing the flue hole frame 5, as shown in FIG. 3, the lower part of the tube part 52 than the flange part 54 is inserted into the flue hole 3, and the flange part 54 is placed on the furnace top side of the flue hole 3. The flue hole frame 5 is installed at a predetermined height in the z-axis direction. Further, the flue hole frame 5 is made of metal having heat resistance, and the tube portion 52 and the flange portion 54 are joined by welding or the tube portion 52 and the flange portion 54 are integrally molded from the base material. It is formed.

  After the flue hole frame 5 is installed in the flue hole 3, as shown in FIG. 6, the flue hole temporary lid 6 is installed above the flue hole frame 5. As shown in FIGS. 7 and 8, the flew hole temporary lid 6 includes a lid member 61, a nut 62, a bolt 63, a washer 64, and a heat insulating material 65. Further, the flew hole temporary lid 6 is formed by inserting a washer 64, a heat insulating material 65, and a lid member 61 into the shaft portion of the bolt 63 in this order, and then screwing a nut 62 onto the tip of the shaft portion of the bolt 63. The

The lid member 61 is a metal member having heat resistance, and includes a tube portion 612, a bottom surface portion 614, and a flange portion 616. The tube portion 612 is formed so that the outer diameter is smaller than the inner diameter of the tube portion 52 of the flew hole frame 5. The bottom surface portion 614 is a disk having a circular opening, and is provided so as to cover the opening at one end of the tube portion 612. The flange portion 616 is a disk-like member that protrudes radially outward over the outer peripheral surface of the other end of the tube portion 612, and has an outer diameter that is the same as the outer diameter of the tube portion 52. The lid member 61 is provided on the top of the flue hole frame 5 by being hooked to the flue hole frame 5 by the flange 616. In addition, the pipe member 612, the bottom surface portion 614, and the flange portion 616 are joined by welding or the tube portion 612, the bottom surface portion 614, and the flange portion 616 are integrally molded from the base material. Is formed.
As shown in FIGS. 6 and 8, the nut 62 is formed with a handle portion 622 to which the attaching / detaching jig 7 is hooked when the flew hole temporary lid 6 is attached / detached.

  The heat insulating material 65 is made of five heat insulating materials, for example, first to fifth heat insulating materials 65a to 65e. The first to fifth heat insulating materials 65a to 65e are cylindrical heat insulating materials made of ceramic fibers. The outer diameters of the first to fifth heat insulating materials 65a to 65e are formed smaller than the inner diameter of the tube portion 52 of the flue hole frame 5, and preferably formed so that the difference from the inner diameter of the tube portion 52 is reduced. . Since the ceramic fiber heat insulating material has elasticity, even if the heat insulating material is formed so that the outer shape of the heat insulating material substantially coincides with the inner diameter of the tube portion 52 of the flew hole frame 5, there is no problem in inserting the heat insulating material into the flew hole. The inner diameters of the first to fifth heat insulating materials 65a to 65e are formed larger than the outer diameter of the shaft portion of the bolt 63, and preferably formed so that the difference from the outer diameter of the shaft portion of the bolt 63 is reduced. . In this way, the outer diameter of the first to fifth heat insulating materials 65a to 65e and the inner diameter of the pipe portion 52 are formed to be small, and the outer diameters of the first to fifth heat insulating materials 65a to 65e are By forming the difference with the outer diameter of the shaft portion of the bolt 63, the heat insulation effect can be improved.

  When the flue hole temporary lid 6 is installed, as shown in FIG. 6, the heat insulating material 65 and the tube portion 612 and the bottom surface portion 614 of the lid member 61 are inserted, and the flange portion 616 of the lid member 61 is inserted into the flue hole frame. The flue hole temporary lid 6 is installed on the upper part of the flue hole frame 5 by being hooked on the upper part of the five pipe parts 52. The flue hole temporary lid 6 is installed on the upper part of the flue hole frame 5 so as to cover the flue hole 3 on the furnace top side and prevent the flame from being ejected from the flue hole 3 to the outside.

  Further, when installing the flue hole temporary lid 6 and when removing the flue hole temporary lid 6 to be described later, as shown in FIG. Work is done. At this time, the tip of the attaching / detaching jig 7 provided with the flange is hooked on the handle portion 622 of the fixing hole temporary lid 6 to attach / detach the temporary fixing hole 6. Thereby, since the operator can detach | desorb the flew hole temporary cover 6 in the state away from the flew hole 3, it can work safely.

In the temporary lid installation process of the present embodiment, by installing the flue hole frame 5 and the flue hole temporary cover 6 in the flue hole 3, it is possible to prevent the ejection of flame from the flue hole 3 in the subsequent repair process. It is possible to work safely in the repair process. Further, by providing the heat insulating material 65 on the flue hole temporary lid 6, it is possible to reduce the temperature rise at the upper part of the flue hole frame 5.
In addition, since the upper part of the flue hole 3 is in an open state until the flue hole temporary lid 6 is installed in the temporary lid installation step, there is a possibility that a flame may be ejected from the flue hole 3 to the outside of the furnace. . Therefore, until the flue hole temporary lid 6 is installed, it is necessary to suppress combustion in the combustion chamber by reducing the inflow amount of the combustion gas.

[2-2. Repair process]
After the temporary lid installation step, the furnace top brick is repaired in a state where the flue hole frame 5 and the flue hole temporary lid 6 are provided (repair step). In the repairing process, first, as shown in FIG. 9, the sleeper 10 is fixed to a predetermined position, and then a tie rod 14 is provided. The sleeper 10 is adjusted to a predetermined position by being fixed to an angle (not shown) or the like provided on the upper portion. At this time, the outer diameter of the upper portion of the flue hole frame 5 needs to be smaller than the inner diameter of the cylindrical portion of the sleeper. However, if the difference between the two is too small, positioning of the sleeper becomes difficult. The outer diameter of the upper part of the hole frame 5 or the inner diameter of the cylindrical portion of the sleeper is determined.

  Next, as shown in FIG. 10, the furnace top mortar 16 is poured to a predetermined height in the z-axis direction. The predetermined height at which the furnace top mortar 16 is poured is lower than the upper end of the flue hole frame 5. In the present embodiment, since the poured furnace top mortar 16 is blocked by the flue hole frame 5, it is possible to prevent the furnace top mortar 16 from entering the flue hole 3.

  Furthermore, when the furnace top mortar 16 poured to a predetermined height is cured to some extent, the furnace top mortar 16 is poured to the height of the furnace top as shown in FIG. Here, the state in which the furnace top mortar 16 poured to a predetermined height has hardened to some extent means that the furnace top mortar 16 poured into the furnace top mortar 16 until it can withstand the load of the furnace top mortar 16 poured to the furnace top. The cured state is shown. As described above, by pouring the furnace top mortar 16 in two portions, even if there is a gap between the flue hole frame 5 and the sleeper 10 in the flue hole 3, the flow into the flue hole 3 is achieved. Intrusion of the furnace top mortar 16 can be prevented.

  Thereafter, the furnace top mortar 16 is completely cured, so that the repair process for the furnace top brick is completed. After the repairing process, as shown in FIG. 12, the sleeper upper plate 12 is provided on the upper part of the sleeper 10, and further, the flue hole temporary lid 6 is removed, so that the state corresponding to the state before the repair shown in FIG. Become. In the furnace top brick repair method according to the present embodiment, the flue hole frame 5 is fixed to the flue hole 3 after repair of the furnace top brick.

As described above, in the furnace top brick repair method according to the present embodiment, the pipe portion 52 having an outer diameter smaller than the flue hole 3 provided at the top of the coke oven and the flue provided over the outer periphery of the pipe portion 52. The flue hole frame 5 having a flange portion 54 having a larger outer diameter than the hole 3 is inserted into the flue hole 3 through a portion of the tube portion 52 of the flue hole frame 5, and the flange portion 54 of the flue hole frame 5 is The flue hole temporary lid 6 is installed on the upper part of the flue hole frame 5 so as to cover the flue hole 3 in which the flue hole frame 5 is installed by being hooked on the upper part of the furnace top side of the hole 3. A temporary lid installing step to be installed, and a repairing step of repairing the furnace top brick including the flue hole 3 in a state where the flue hole temporary lid 6 is provided. Thus, by providing the flue hole temporary lid 6, it is possible to prevent the flame from being ejected from the flue hole 3, and to ensure the safety of the repair work in the repair process after the temporary lid installation process. .
Further, in the furnace top brick repair method according to the present embodiment, in the repair process, the furnace top mortar 16 used for repair is poured into a position lower than the flue hole frame 5 and hardened, and then poured into the furnace top. Solidify. Thus, by pouring the furnace top mortar 16 in two portions, the furnace top mortar 16 can be prevented from entering the flue hole 3.

Further, in the furnace top brick repair method according to the present embodiment, the flue hole temporary lid 6 is formed on the lid member 61 composed of the tube portion 612, the bottom surface portion 614, and the flange portion 616, and below the bottom surface portion 614 of the lid member 61. The heat insulating material 65 is fixed, and when the temporary lid is installed, the heat insulating material 65 and the tube portion 612 and the bottom surface portion 614 of the lid member 61 are inserted into the flue hole frame 5, and the flange portion of the lid member 61 is inserted. The flue hole temporary lid 6 is installed on the flue hole frame 5 by hooking 616 on the upper part of the flue hole frame 5. Thus, by providing the heat insulating material 65, the temperature of the upper part of the flue hole frame 5 can be lowered, and the curing abnormality of the furnace top mortar 16 that comes into contact with the upper part of the flue hole frame 5 during the repairing process can be reduced. Can be prevented.
Further, in the furnace top brick repair method according to the present embodiment, the flue hole temporary lid 6 has a handle portion 622, and the attachment / detachment jig 7 is attached to the handle portion 622 when the flue hole temporary lid 6 is detached. To do. Thereby, since the operator can detach | desorb the flew hole temporary cover 6 in the state away from the flew hole 3, it can work safely.

  Further, in the furnace top brick repair method according to the present embodiment, a sleeper 10 is provided around the flue hole 3 to be repaired, and the repair process involves repairing bricks or mortar around the sleeper 10 or the sleeper 10. It becomes repair at the time of exchange. Thus, by performing the work in a state in which flame ejection from the flue hole is prevented, the accuracy of the positioning and positioning of the sleeper 10 can be improved. In addition, when the sleeper is replaced, the flew hole temporary lid can be removed even after the sleeper is installed.

<3. Modification>
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

For example, in the above embodiment, the furnace top mortar 16 is poured in two times, but the present invention is not limited to such an example. When the flue hole frame 5 is formed so that there is no gap between the flue hole 3 and the sleeper 10, the furnace top mortar 16 may be poured to the height of the furnace top by one pouring.
Moreover, in the said embodiment, although the heat insulating material 65 consisted of ceramic fiber, this invention is not limited to this example. For example, as the heat insulating material 65, a fiber heat insulating material such as a ceramic fiber or a fired heat insulating material having heat resistance may be used.

Moreover, although the said embodiment demonstrated the case where repair was performed about the mortar 16 for furnace tops, this invention is not limited to this example. For example, in the repair process, the carbonization chamber brick 42 and the flue hole brick 32 around the furnace top mortar 16 may be repaired.
Moreover, although the said embodiment demonstrated the case where the mortar 16 for furnace tops was repaired as partial repair of a furnace top brick, this invention is not limited to the example which concerns. For example, the repair process may be a brick repair process around the sleeper 10 or a repair process when the sleeper 10 is replaced.
Moreover, although the said embodiment demonstrated the case where repair was performed about the flue hole 3 periphery in which the sleeper 10 was provided, this invention is not limited to this example. For example, the present invention can also be applied to partially repairing the other flew hole 3 without the sleeper 10.

DESCRIPTION OF SYMBOLS 10: Sleeper 12: Sleeper upper plate 14: Tie rod 16: Mortar for furnace top 20: Coal-car traveling rail 22: Traveling girder 3: Flue hole 32: Flue hole brick 4: Carbonization chamber brick 5: Flue hole frame 52: Pipe part 54: Lim part 6: Flew hole temporary lid 61: Lid member 612: Pipe part 614: Bottom face part 616: Lim part 62: Nut 622: Handle part 63: Bolt 64: Washer 65: Insulation material 65a: First 1 heat insulating material 65b: 2nd heat insulating material 65c: 3rd heat insulating material 65d: 4th heat insulating material 65e: 5th heat insulating material 7: Detachment jig

Claims (6)

After removing the top mortar and sleeper around the flue hole to be repaired provided at the top of the coke oven, the pipe part having an outer diameter smaller than the flue hole, and the outer part of the pipe part A flue hole frame having a flange portion having an outer diameter larger than the flue hole, a part of the tube portion of the flue hole frame is inserted into the flue hole, and the rib portion of the flue hole frame is inserted into the furnace of the flue hole. Temporary lid installation in which the flue hole temporary lid is installed on the upper part of the flue hole frame so as to cover the flue hole on which the flue hole frame is installed by being hooked on the top side of the top side Process,
A repairing step of repairing the periphery of the flue hole using a furnace top mortar and a sleeper in a state where the flue hole temporary lid is provided,
Equipped with a,
In the repair step, the sleeper is installed such that the lower end portion of the sleeper is positioned lower than the upper end portion of the flue hole frame in a state where the flue hole temporary lid is provided, and the furnace top mortar a method of repairing a peripheral flue hole of a coke oven to pouring by solidifying said Rukoto a. During the repair process, the furnace top mortar used for repair, the flues Anawaku after solidified by pouring up to a position lower than the upper end portion of the claim, characterized in that hardened by pouring more to the furnace top 1 The repair method around the flue hole of the coke oven described in 1. The flue hole temporary lid has a lid member composed of a tube portion, a bottom surface portion, and a flange portion, and a heat insulating material fixed to a lower portion of the bottom surface portion of the lid member,
In the temporary lid installation step, the heat insulating material and the tube portion and the bottom surface portion of the lid member are inserted into the flue hole frame, and the flange portion of the lid member is hooked on the upper portion of the flue hole frame. The method for repairing the periphery of a coke oven around a flue hole according to claim 1, wherein the flue hole temporary lid is installed on the flue hole frame. The method for repairing the periphery of a coke oven in a coke oven according to any one of claims 1 to 3, wherein the flue hole temporary lid is removed from the flue hole frame after the repairing step. . The flue hole temporary lid has a handle,
5. The method for repairing the periphery of a coke oven around a flue hole according to claim 1, wherein an attachment / detachment jig is hooked to the handle portion when the flue hole temporary lid is attached / detached. 6. Before SL repairing process, the flue hole surrounding bricks and mortar repair process or, coke oven according to any one of claims 1 to 5, characterized in that the repairing process when replacing the sleeper To repair around the flue hole .

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