JP2562400B2 - Construction method of brick wall in hot repair work of coke oven - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a wall for repairing a brick wall such as a carbonization chamber in hot repair work of a coke oven used for iron making and the like.

[0002]

2. Description of the Related Art A brick wall of a coke oven used for steel making or the like is prone to damages, cracks, corner breaks, etc., after many years of use.
Therefore, this is inspected regularly to repair the damaged wall bricks, either in whole or in part.

In particular, the bricks in the coke chamber wall in these coke ovens are heated by the adjacent combustion chambers and are constantly heated to 1000 to 12
It is exposed to high temperature of 00 ° C, the wet coal is charged into it and the bricks in the furnace are rapidly cooled, the friction due to the extrusion of carbonized coke, the lateral pressure, the adhesion of carbon generated during carbonization and its separation, etc. Since the bricks are severely damaged due to repeated operations under severe conditions, the damaged wall bricks are repaired by the hot brick transshipment method.

In this case, if the temperature of the combustion chamber adjacent to the carbonization chamber to be repaired is lowered too much, cracks may occur in the brick wall which is not repaired. Therefore, during repair, thermal changes in the brick wall and joints are caused. To minimize
It is necessary to maintain the brick temperature of the non-repaired part as high as possible for repair work.

[0005]

FIGS. 2 (a) and 2 (b) are drawings showing an example of a method of constructing a brick wall in a conventional hot repair work, and repairing a section covering a wide range such as a brick wall. When performing, first, a step portion 13a is provided on the brick on the starting end side of the brick wall 11 to be repaired in order to improve connectivity,
Further, the brick 14 on the non-repair part side is also provided with a step part 15a so as to be combined with the step part 13a.
Make a close contact by combining a.

Next, the brick construction is started from this position as a starting point, and the bricks on the terminal side of the repair are similarly provided with step portions 13b and 15b, respectively, and the repair site brick 1
A gap 16 corresponding to the thermal expansion margin of 1 is provided.

When the furnace body is heated and expanded to a predetermined temperature with the above construction, the brick 11 on the repair side expands starting from the brick on the start end side to fill the gap 16 and the step of the brick on the end side. The parts 13b and 15b are in close contact with each other, and the airtightness of the brick wall is maintained.

By the way, in the hot repair work of the brick wall, there is no problem when the repair section is relatively small or when the end of the repair furnace wall is open, but when the repair section extends over a wide range. The expansion margin of the brick also becomes large, and it is necessary to make a large gap 16 on the terminal side corresponding to this expansion margin.

In this case, as shown in FIG. 2B, there is no overlap between the new and old bricks on the terminal side, and the constructed brick wall 11 becomes unstable, and the wall collapses when it is expanded by heating. Occurs.

Further, since the expansion allowance is large, a large reaction force acts on the bricks on the starting end side during expansion, which causes distortion on the wall surface during expansion, and incomplete adhesion of the bricks on the terminal end side. .

The present invention solves the above problems and provides a method for constructing a brick wall which facilitates construction in hot repair work of a coke oven and stably heats and expands the brick wall.

[0012]

The present invention relates to a method of constructing a brick wall for hot repairing a damaged brick wall of a coke oven, in which a brick wall section to be constructed and repaired is left and right in the vicinity of the center thereof. Proceed with the construction of the brick wall, the bricks on the terminal side each have a step so that they can be combined with the step provided on the brick on the non-repair side, and combine both steps, and the brick on the non-repair side It is installed with a gap of half of the length corresponding to the thermal expansion margin of the brick wall constructed in between, and then the temperature of the brick wall is raised to expand in both left and right directions, and the non-repair part brick wall It is a method of constructing a brick wall in a hot repair work of a coke oven, which is characterized in that the connection surface with the is closely contacted.

[0013]

In the present invention, when partially rebuilding a damaged brick wall by hot repair, the conventional method was to proceed with the building in only one direction, starting from the vicinity of the center of the brick wall section to be built and repaired. As a feature, the construction of brick walls is promoted in both left and right directions.

According to the present invention, the expansion allowance provided on the terminal side is half that in the case of one-way construction.
A large overlapping portion between the non-repaired portion and the constructed brick wall can be taken on the terminal side of the construction, and the constructed wall can be constructed accurately and stably without falling down. Further, by constructing in this way, the construction time can be shortened.

Further, by providing a thermal expansion margin at the time of temperature rise on both ends of the construction and expanding the brick wall in both left and right directions, an abnormal reaction force acts on the constructed brick wall itself and the wall of the non-repair part. It expands smoothly without doing so, and even with the brick wall of the non-repaired part, it comes into contact with the left-right uniform force and completely adheres.

[0016]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a drawing showing an example of a brick wall construction method in the hot repair work of a coke oven, and FIG.
Is a front view of the carbonization chamber wall, and FIG. 1 (b) is a horizontal sectional view showing details of the connecting portion.

As for the brick wall 1 to be constructed and repaired, the brick wall 1 is constructed in both left and right directions with the starting point 2 being near the center of the repair section.

The bricks on the left and right ends are provided with a step 3 for improving the connectivity, and the brick 4 on the non-repair side is also provided with a step 5 so as to be combined with the step 3. The step portions 3 and 5 of No. 3 are combined and provided with a gap 6 corresponding to one half of the length corresponding to the thermal expansion margin of the constructed brick wall 1 between the step portion 3 and the brick 4 on the non-repair side. To do.

Subsequently, the brick wall 1 thus constructed is heated to a predetermined temperature to expand the brick wall 1 in both left and right directions to form a gap 6
And completely connect the connecting surfaces of the steps of both brick walls. In addition, an irregular shaped furnace material is appropriately sprayed to the joint portion which is brought into close contact, a groove is provided at the joint portion, and the irregular shaped furnace material is filled in the joint portion, so that both bricks are tightly connected.

[0021]

As described above, according to the present invention, since the brick wall is constructed in both left and right directions starting from the vicinity of the center of the repair section, the expansion allowance provided on the terminal side is unidirectional. Since it is only half as compared with the case of construction, it is possible to take a large overlap between the non-repaired part and the constructed brick wall, and it is possible to construct an accurate and stable brick wall without the wall falling over during construction. .

Further, by expanding the brick wall evenly in both the left and right directions, the brick wall itself and the wall of the non-repaired part expand smoothly without any abnormal reaction force acting on the brick wall and the non-repaired part of the brick wall. Even with respect to each other, they contact with equal force on the left and right sides and completely adhere.

Further, by constructing in this way, the construction time can be shortened, which is advantageous especially when the repair section is large.

[Brief description of drawings]

FIG. 1 is a drawing showing an example of a brick wall construction method in hot repair work of a coke oven, FIG. 1 (a) is a front view of a carbonization chamber wall, and FIG. 1 (b) is a horizontal view showing details of a connecting portion. FIG.

FIG. 2 is a drawing showing an example of a brick wall construction method in a hot repair work of a conventional coke oven, FIG. 2 (a) is a front view of a carbonization chamber wall, and FIG. 2 (b) is a detailed view of a connecting portion. It is a horizontal sectional view shown.

[Explanation of symbols]

 1,11 Brick wall on the repair side 2 Start point of construction 3,5 Steps 4,14 Brick wall on the non-repair side 6,16 Gap 13a, 13b Step 15a, 15b Step

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuya Okani 1 Fujimachi, Hirohata-ku, Himeji-shi, Hyogo Nippon Steel Corporation Hirohata Works (56) Reference JP-A-53-134001 (JP, A) Actual development Sho 56-138854 (JP, U)

Claims (1)

(57) [Claims] 1. A method of constructing a brick wall for hot repairing a damaged brick wall of a coke oven, wherein the brick wall is constructed to the left and right, starting from approximately the center of the brick wall section to be constructed and repaired. The brick on the end side is
A length equivalent to the thermal expansion allowance of the brick wall built between the brick on the non-repair side and the step on the brick on the non-repair side The coke oven is characterized in that it is installed with a gap of ½ of the space, and then the brick wall constructed by heating is expanded in both the left and right directions, and the connection surface with the non-repaired part brick wall is brought into close contact. Method of building brick wall in hot repair work in Japan.