JPH0111714Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is easy to construct and dismantle, has little heat radiation, and is free from ash, coke, tar, etc.
The present invention relates to the provision of a coke oven door structure with a long life and less adhesion and infiltration of pitches.

Conventionally, coke oven doors are made of single refractory bricks covered with iron and laminated or made of monolithic refractories, and the materials used are siamots, fused silica, etc.

Therefore, the conventional coke oven door structure has poor workability during repair and disassembly due to its shape, and tar, pitch, etc. adhere to it and enter the joints, which requires considerable labor and expense to remove. The problem was that the refractories were damaged during the removal work, and in the case of laminated bricks, a large amount of heat was dissipated due to the iron cover.

The present invention solves these problems, and the gist is that the coke oven door structure is made by laminating multiple refractory bricks, and its planar shape has flat sides from the outside of the furnace to the inside of the furnace. It is characterized by a structure in which a block made of a required number of single refractory bricks adhesively tightened is fixed to a coke oven door iron sheath.

The present invention will be explained below based on the drawings and in comparison with the prior art.

Figures 1a, b, and c are examples of conventional technology for building fireproof bricks in a layered manner, in which firebricks shaped as shown in the figure are attached to a door iron sheath 1 having a firebrick locking hardware 6 provided with a firebrick locking part. It is constructed by stacking layers 7 alternately, and 8 is firebrick metal fittings installed at required locations.

In such a structure, when used, tar is removed from the joint 9.
Loosening of the structure due to the joints being pushed open due to the intrusion of pits, etc., repairs due to wear and tear of the refractory bricks 7, problems where the refractory brick locking hardware 6 gets in the way during demolition, and heat dissipation through the hardware 6 door iron sheathing 1. There were many. This was especially a problem during partial repairs. Therefore, the present invention is shown in Figure 2.
b, c In particular, as shown in the plan views b and c, the single refractory freezing tiles 2 are shaped to have a flat side surface C from the outside A to the inside B of the furnace, and are assembled with adhesive 5 and fastening hardware 4 in the required number. Door iron cover 1 made into blocks
In addition, it is constructed by locking the single refractory bricks with block locking metal fittings 3 installed in support holes 3' provided in a manner that does not penetrate into the inner surface of the furnace. Since there are no joints like 9 in the figure, which are easy to open in the structure of the conventional technology, there is no obstruction due to infiltration of tar, pits, etc., and repairs and disassembly can be easily done by simply releasing the block locking hardware 3. I can do it. In particular, partial repair is easy. Furthermore, since the metal fittings 6 are not required, the amount of heat dissipated is reduced.

The one in figure c is from the iron sheath 1 to the extension part 1 in figure b.
This is an example with 0. The above-mentioned flat side surface C does not have the uneven locking part as shown in Fig. 1b, so that the 2nd part of the refractory brick can be easily removed from the 1st part of the iron sheathing during repair or disassembly, and in the case of Fig. 2b. Both sides may be parallel or tapered, and in the case of Fig. 2c, they may be parallel or tapered to become narrower toward the inside of the furnace. In addition, the block locking hardware 3 and the tightening hardware 4 are located at the locations shown in the figure.
It is not limited to the shape, and the fixing method can be bolts or
Various methods can be used, such as a nut method and a cotter method.

Adhesive lamination and tightening of single refractory bricks 2 of the present invention 1
For example, the block is made of firebrick 2 with a thickness of 60 to 100 mm.
It is to be laminated to a thickness of 400 to 1500 mm.

For example, the adhesive material is as shown in Table 1 below.
In particular, the adhesive strength of ordinary fireproof mortar is 50 to 100.
It has a strong adhesive strength of about Kg/cm ² and, in combination with the denseness of firebrick 2 described below, is effective in preventing tar, pitch, etc. from entering the joints and opening them.

Table 1 Chemical composition (%) SiO ₂ 14.1 Al ₂ O ₃ 80.1 Adhesive strength (Kg/cm ² ) Room temperature 171 Hot 200°C 200 500°C 200 800°C 200 1000°C 193 Furthermore, for refractory brick 2, door iron covering side It is also possible to create a so-called heat insulating structure by providing a part of the hollow space or by combining it with a heat insulating material. When the material of the refractory brick 2 is cordierite, its low expansion property and subdivided laminated type contribute to thermal shock resistance.
Because the refractory brick 2 of this invention is small, it has been molded under high pressure and fired to have a porosity of 25% compared to conventional clay bricks.
%, compared to about 30% for monolithic refractories, it is dense at 16.5% as shown in Table 2 below,
There is little adhesion and infiltration of tar, pitch, ash, coke, etc., and in combination with the above-mentioned shape and structure characteristics, it is possible to provide an excellent coke oven door that has never been available before.

Table 2 Chemical composition (%) SiO ₂ 55.3 Al ₂ O ₃ 40.9 MgO 1.5 Refractory degree (SK) 32 Bulk specific gravity 2.22 Apparent porosity (%) 16.5 Compressive strength (Kg/cm ² ) 609 Coefficient of thermal expansion (%) at1000 ℃ 0.50 Residual wire expansion/contraction rate (%) 1350℃ x 2 hours -0.12 Spall resistance 1000℃ x 15 minutes Water cooling 3 minutes 10 times No peeling

[Brief explanation of drawings]

Figure 1 a, b, and c show the conventional coke oven door structure, where figure a is a vertical sectional view taken along the line a to a in figure b, figure b is a plan sectional view, and figure c is a figure c to c in figure b. Fig. 2 is a vertical sectional view, Fig. 2 a, b, c shows the coke oven door structure of the present invention, Fig. a is a longitudinal sectional view, and Fig. 2 b, c is a different embodiment. It is a line arrow view. 1... Door iron covering, 6... Firebrick locking hardware, 7...
... Firebrick, 8... Firebrick receiving hardware, 9... Joint section, 2... Single firebrick, 3... Locking hardware, 4
...Tightening hardware, 5...Adhesive material.

Claims (1)

[Scope of utility model registration request] In a coke oven door structure formed by stacking a plurality of refractory bricks in the height direction, a required number of single refractory bricks 2 each having a flat side face from the outside of the furnace toward the inside of the furnace are bonded together, and a fastening hardware 4 is attached. The block is secured to the coke oven door iron sheath 1 by a locking metal fitting 3 provided in a support hole 3' provided between the single refractory bricks in a manner that does not penetrate into the inner surface of the furnace. A coke oven door featuring