JPH0649451A - Method for supporting brick of ceiling part during hot repairing of coke oven - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is intended for hot repair of a coke oven,
Provided is a method for supporting a ceiling brick that can appropriately prevent joint breakage and falling due to shrinkage of the brick. [Structure] When supporting the ceiling part 3 of the wall structure to be dismantled and repaired, the support beams 4 and 5 are horizontally mounted with the wall structure 2 of the non-repaired part in the furnace group direction as a fulcrum, and the suspension bolt 7 is suspended from this support beam. This is a method of supporting a ceiling brick in which the lower surface of the ceiling portion 3 of the repair portion is lifted and supported, and the upper portion of the suspension bolt 7 is supported on a support beam through a spiral spring 10 inserted in the lower portion of the tightening nut 9. [Effect] The reaction force of the spiral spring applies a certain lifting force to the looseness of the bricks to prevent joint breakage and brick fall-off, perform stable hot repair work, and eliminate the risk of gas leaks. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supporting a ceiling brick of a non-repaired portion during hot repair of a carbonization chamber of a coke oven.

[0002]

2. Description of the Related Art A coke oven which is widely used for steelmaking today has a heat storage chamber in the lower half, and carbonization chambers and combustion chambers are alternately arranged horizontally in the upper portion of the coke oven to keep gas in the combustion chamber. By the combustion, the heat of combustion dry-distills the charged coal in the carbonization chamber to produce coke.

The coke oven is a refractory brick construction, and in particular, the bricks in the carbonization chamber are constantly exposed to a high temperature of 1000 to 1200 ° C., in which wet coal is charged to quench the bricks in the furnace. As the operation is repeated under severe conditions such as friction due to extrusion of carbonized coke, carbon adhering and peeling during lateral pressure and carbonization, brick damage, cracks, corner breakage, etc. may occur during long-term use. To do. Therefore, this is regularly inspected and the damaged wall bricks are partially repaired by the hot brick transshipment method.

In this hot briquetting and repairing of the carbonization chamber, when the furnace wall bricks, which are the supporting columns of the coke oven, are dismantled, the bricks contract because the furnace temperature in the repair section is lowered, and the bricks become loose. May occur and cause gas leakage.

[0005] In addition, since the operation is performed except for the repair kiln,
Mobile machines such as charging cars run on the furnace, and the vibration of these machines causes the rails to bend and loosen the bricks.Therefore, it is necessary to perform curing to prevent the ceiling bricks from falling during repair. is there.

As a means for preventing cracks and drops of these ceiling bricks, for example, the support structure shown in FIG. 2 disclosed in Japanese Utility Model Publication No. 61-26342 has been used.

In this support structure, a large beam 11 is laid at a position not interfering with a charging vehicle at the top of the furnace, a small beam 12 is provided in the combustion chamber row direction 14 of the coke oven, and the small beam 12 intersects with the large beam 11. Fix at position 13. The beam 12 is provided with an opening 17 for the hanging bolt 16 at a position located at the port of the combustion chamber 15.

Next, the upper part of the carbonization chamber wall having a height corresponding to the lower part of the ceiling brick is partially disassembled, and the ceiling brick bracket 18 is inserted. Support 17 and prevent its fall.

[0009]

By the way, during hot repair of the coke oven, the shrinkage of the brick due to cooling of the furnace body progresses with the passage of construction time, and at the time of repair, the operation of the coke oven continues, so the furnace top At this time, a loading vehicle of 100 tons or more always runs, and vibration is applied to the ceiling brick of the repair section.

In order to prevent the joint loosening and the brick falling off due to the loosening of the bricks due to this vibration, the suspension adjustment work must be carried out by retightening the suspension bolts 16 every two to three hours even during the work. If the work is inadequate, the looseness of the bricks will remain after completion, causing gas leaks and the like, forcing repair of the ceiling again.

The present invention solves the above problems, and provides a ceiling brick supporting method capable of appropriately preventing joint breakage and falling due to shrinkage of bricks during hot repair of a coke oven.

[0012]

According to the present invention, when supporting a ceiling portion of a wall structure to be dismantled and repaired during hot repair of a coke oven, a support beam is supported by using a wall structure of a non-repair portion in a furnace group direction as a fulcrum. The suspension beam is laid horizontally and the suspension bolt is suspended from the support beam to suspend and support the lower surface of the ceiling of the repair section, and the upper part of the suspension bolt is supported on the support beam via a spiral spring inserted in the lower part of the tightening nut. This is a method of supporting a ceiling brick during hot repair of a coke oven, which is characterized in that

[0016]

[Operation] When the bricks of the coke oven, which are the support pillars of the coke oven, are dismantled during the hot brick transshipment repair of the carbonization chamber, etc., the roof bricks contract because the furnace temperature in the repair section decreases, and the bricks become loose as a structure. Occurs.

As for the slack, the contraction of the brick due to the cooling of the furnace body progresses with the lapse of construction time. Conventionally, the suspension bolts that lift and support this ceiling brick have no supporting force because there is only a certain tightening margin, and due to this slack, suspension adjustment is performed by re-tightening the suspension bolts every 2-3 hours during work. I was working on it.

According to the present invention, the spiral spring is interposed between the suspension bolt for supporting the ceiling brick and the support beam having the wall structure of the non-repair portion as a fulcrum, and the reaction force of the spiral spring prevents the looseness. The suspension bolt is always applied with a constant lifting force.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of the supporting method of the present invention. FIG. 1 (a) is a schematic sectional view showing the whole supporting method, and FIG. 1 (b).
FIG. 3 is a detailed view of a main part.

FIG. 1 shows the length direction of a coke oven gang.
Indicates a wall structure for repair, 2 indicates a wall structure of a non-repaired portion, and 3 indicates a ceiling portion. First, a large beam 4 is horizontally laid as a supporting beam in the length direction of the furnace at regular intervals with the wall structure 2 of the non-repaired portion as a fulcrum, and a small beam 5 is arranged along the position of the ceiling part 3 supported between the large beams 4. .

Next, a hanging bolt 7 is hung from the beam 5 in an insertion hole 6 formed in the ceiling portion 3, and a lower surface of the ceiling portion 3 of the repair portion is lifted and supported via a washer 8. The upper part of the suspension bolt 7 is supported on the beam 5 via a spiral spring 10 inserted in the lower part of the tightening nut 9.

In this way, by suspending and supporting the lower surface of the ceiling portion 3 by the suspension bolt 7, a constant suspension force is applied to the suspension bolt 7 to prevent the ceiling portion 3 from being broken and the brick falling off.

As a construction example, a horizontal direction of a two-flue row coke oven: 14 flues of No. 9 flue to No. 22 flue, and 36 to 68 stages in the height direction of the carbonization chamber (furnace bottom to 33
The present invention was adopted for dismantling the bricks of (steps), and a spring capable of withstanding a load of 1 ton was adopted for one flue to support ceiling bricks, and the other flue rows were supported by the conventional method for construction. As a result, compared with the conventional method, the example of the present invention was able to sufficiently cope with the construction without loosening of the brick in the hanging adjustment work such as retightening once / three days.

[0025]

As described above, according to the present invention, by interposing the spiral spring in the hanging bolt, a constant lifting force is always applied to the loosening of the brick due to the cooling of the furnace body due to the reaction force of the spiral spring. It is added to prevent joint breakage and brick fall-off, which enables stable hot repair work and eliminates the risk of gas leakage after completion.

[Brief description of drawings]

FIG. 1 shows an example of a ceiling brick supporting method of the present invention,
FIG. 1 (a) is a schematic sectional view showing the overall supporting method, FIG.
(B) is a detailed view of a main part.

FIG. 2 is a schematic cross-sectional view showing an example of a conventional ceiling brick supporting method.

[Explanation of symbols]

 1 Wall structure for repair 2 Wall structure of non-repaired part 3 Ceiling part 4 Large beam 5 Small beam 6 Insertion hole 7 Hanging bolt 8 Washer 9 Tightening nut 10 Spiral spring

Claims (1)

[Claims] 1. At the time of hot repair of a coke oven, when supporting a ceiling portion of a wall structure to be dismantled and repaired, a support beam is laid horizontally with a wall structure of a non-repair portion in the furnace group direction as a fulcrum. The coke oven heat is characterized in that the hanging bolt is hung to support the ceiling lower surface of the repair part by lifting, and the upper part of the hanging bolt is supported on the support beam via a spiral spring inserted in the lower part of the tightening nut. Method of supporting the bricks on the ceiling during repair.