JPH09159373A - Applying method of refractory lining for furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit the application of lining for a furnace without employing any frame essential for pouring application. SOLUTION: An anchor 3 in a refractory hollow block 1, which is manufactured previously at another place, is connected to the extended part 8a of the leg part of a stud 8, fixed to an iron skin 2, through a connecting member 9 and the like in a furnace while a refractory hollow block 1 is fixed and installed so as to be contacted with the repairing part of the inner wall of furnace and, thereafter, the hollow part of the refractory hollow block 1 is filled with castable refractory 10, poured thereinto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for lining a refractory lining for an industrial kiln.

[0002]

2. Description of the Related Art Conventionally, in the construction of an industrial kiln, such as a blast furnace, a converter, an incinerator, and a lining structure of a ladle that is a representative of a molten metal container, "Kirune Engineering" issued by the Refractory Engineering Association. The construction method described in detail in the literature such as "" is adopted.

Taking a refuse incinerator as an example, a typical side wall lining structure is castable refractory 230 mm, insulating tile 114 mm, high-temperature insulating board 30 mm, low-temperature insulating board 100 mm. The reality is that the lining thickness of the high-temperature insulation board and the low-temperature insulation board is changed and adjusted.

[0004]

However, in order to obtain a structure of uniform quality, it is usually standard to cast castable refractories by pouring, and in addition to this, spraying or plastic refractory is recommended. There are stamp construction by the rammer used, etc., but it is difficult to obtain a construction with uniform quality by any method.

A mold is required for the pouring construction,
In addition to the drawback that the castable refractory poured into the frame cannot be deframed until it hardens, the work until deframing is awaited and interrupted, which increases the construction cost.

On the other hand, in the spraying construction, it is difficult to obtain a structure having uniform quality, and the rebound loss is 15 to 2 during the spraying.
Since about 0% is generated, there is a problem that the material cost is increased by the division.

[0007]

DISCLOSURE OF THE INVENTION It is an object of the present invention to provide a furnace refractory lining construction method that can be carried out without using a formwork that was conventionally required for casting castable refractories. As a solution, the castable refractory was poured into the hollow part using a refractory hollow block manufactured in another place in advance, and this hollow block was sequentially constructed to construct the lining. As a result, lining can be performed without using a formwork.

[0008]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the embodiments shown in FIGS.

FIG. 1 is a perspective view of a single refractory hollow block 1 according to the present invention as seen from the side of a steel shell 2. FIG. 2 is a sectional view showing a state in which the block 1 of FIG. 1 is installed in a furnace. .

The refractory hollow block 1 has a substantially rectangular parallelepiped outer shape, has a hollow box shape, and has a bottomless structure having a bottom portion 1b. The material is a refractory material such as high alumina castable. Has become.

The block 1 is manufactured by pouring the above material into a mold made of a wooden frame, drying the mold, and then removing the frame.

The refractory hollow block 1 is provided with one to a required number of holes 4 through which an anchor member 3 such as a stud is inserted in the back surface 1a on the side of the iron skin 2.

Next, as shown in a sectional view of a part of the furnace in FIG. 2, a low temperature heat insulating board 5, a high temperature heat insulating board 6 and a heat insulating tile 7 are provided from the outermost iron shell 2 to the inside of the furnace. Castable refractories that are to be repaired are installed on the inside.

A leg end of a stud 8 is fixed to the iron shell 2 at right angles to the iron skin 2 by welding or the like, and the tip 8a of the extended portion has at least the low temperature heat insulating board 5 and the high temperature heat insulating board 6. It penetrates and stays in the heat insulating tile 7.

Therefore, in order to mount the refractory hollow block 1 produced as described above in the furnace for repairing the furnace wall, first, as shown in FIG. The base end of the anchor 3 is pulled out from the hole 4 to the outer surface thereof, and is connected to the tip 8a of the stud 8 by a joint member 9 including a nut 9a, a socket 9b, a washer 9c, etc., and the refractory hollow block 1 in the lowermost stage is heat-insulated and kneaded. The tile 7 is attached so as to come into contact with the outer surface thereof. From this state, the castable refractory material 10 is poured and filled into the refractory material hollow block 1. In this way, one side wall lining is finished. The castable refractory 10 is gradually hardened and integrated with the anchor 3, so that the castable refractory 10 is supported by the anchor 3 and integrated with the refractory hollow block 1.

Thus, the refractory hollow blocks 1 are sequentially arranged in the lateral direction to perform the first stage construction, and if necessary, the joints are filled between the adjacent refractory hollow blocks 1 to close them.
After that, the refractory hollow blocks 1 in the next stage are stacked on the refractory hollow blocks 1 in the lower stage and sequentially constructed in the same manner as described above, thereby performing the lining construction on the construction target surface of the furnace wall.

In claim 2, the castable refractory 10 in the preceding refractory hollow block 1 is completely hardened when the side wall lining is finished by advancing the construction work according to claim 1 upward, leftward and rightward of adjacent parts. Even if it is not protected, since it is protected by the refractory hollow block 1, the work can proceed regardless of the timing of curing.

The refractory hollow block 1 shown in FIG. 1 is used for a furnace having a flat iron shell 2, but the refractory hollow block 1'for working on a curved surface of the furnace is shown in FIG. This can be dealt with by forming the back surface 1'a by curving the curved surface in the furnace as shown in FIG. 4'and 4'indicate holes for passing the anchor. In this case, it is preferable that a plurality of holes 4'and 4'be provided in order to maintain stability during construction.

FIG. 4 is a front view of a part seen from the inside of the furnace when repair work is carried out using the refractory hollow blocks 1, 1.
Construction space 1 when constructing the refractory hollow blocks 1, 1 ...
1 shows the case where 1 occurs, and in this case, cast the castable refractory or other irregular shaped refractory so that the anchors 3, 3 located in the construction space 11 are built in and carry out on-site construction. You can

[0020]

As described above, the construction method according to the present invention has the following effects. 1) There is no need to install and remove the formwork at the construction site. 2) Since it is possible to continuously perform the subsequent construction without waiting for the castable refractory to harden, the construction can be performed quickly. 3) Construction costs can be reduced by the items 1 and 2 above.

[Brief description of the drawings]

FIG. 1 is a perspective view of a standard refractory hollow block used in the present invention.

FIG. 2 is a partial cross-sectional view of the inside of a furnace in which the refractory hollow block of the present invention is installed.

FIG. 3 is a perspective view showing a modified example of the refractory hollow block of the present invention used when the inner surface of the furnace is a curved surface.

FIG. 4 is a partial front view showing the situation in which a construction space is created during repair construction as seen from the inside of the furnace.

[Explanation of symbols]

 1,1 'Refractory hollow block 1a, 1'a Back of refractory hollow block 2 Iron skin 3 Anchor 4, 4'Hole 5 Low temperature heat insulation board 6 High temperature heat insulation board 7 Heat insulation tile 7 8 Stud 8a Tip 9 Joining Member 9a Nut 9b Socket 9c Washer 10 Castable refractory 11 Construction space

Claims (2)

[Claims] 1. In lining construction of various industrial kilns,
The anchor in the refractory hollow block is connected to the part of the stud leg that is fixed to the iron skin inside the furnace by a connecting member, etc.
The refractory lining construction for a furnace, characterized in that the refractory hollow block is installed so as to come into contact with the repaired portion of the inner wall of the furnace, and then castable refractory is poured into the hollow part of the refractory hollow block to be cured. Method. 2. A construction method for the lining construction,
The furnace lining construction method according to claim 1, wherein the castable refractory is successively lined up in adjacent repair areas without waiting for hardening.