JPH0124138Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to the structure of a coke oven lid. Conventionally, various structures of coke oven lids are known. For example, FIGS. 1-4 illustrate two examples of conventional coke oven lid constructions. In general, the lining brick 1 is fixed to the furnace lid rib 2 with mounting fittings 4 such as bolts or nuts. A buffer material 3 is usually interposed between the lining brick 1 and the hearth rib 2. This is a conventional general structure, but as is well known, when the furnace lid is used, the fitting 4 is heated and expands. A gap (5 or 6) is formed between the hole in the lining brick 1 and the mounting bracket 4 as an expansion allowance for the mounting bracket 4. In other words, this gap allows the mounting bracket 4 to freely expand thermally. However, coke oven gas at a temperature of approximately 1200°C generated from a coke oven may enter this gap. That is, coke oven gas passes between the lining brick 1 of the oven lid, the ribs 2, and the buffer material 3, and enters the gap 5.
Or it may invade 6. The coke oven gas then deposits as tar pitch in the voids. The volatile content of this tar pitch is removed by heating, and as a result, only carbon remains and sticks to the wall of the hole in the lining brick. If this happens repeatedly, the voids will eventually become filled with hard carbon. This phenomenon is particularly noticeable inside the furnace where the temperature is high. In any case, an allowance for expansion of the fittings is necessary, but unless the above-mentioned intrusion of coke oven gas is prevented, the life of this type of structure will be significantly shortened. In other words, the voids are filled with carbon, which effectively reduces the expansion allowance of the fittings, and as a result, the force due to the expansion and contraction of the fittings is applied to the lining bricks, eventually destroying them. . The purpose of the present invention is to solve the above-mentioned drawbacks of the prior art and prevent coke oven gas from entering the gap between the hole in the lining brick and the fitting, thereby preventing the lining brick from being destroyed. The object of the present invention is to provide a structure of a coke oven lid. The present invention will be described below with reference to embodiments shown in the drawings. In the embodiment shown in FIGS. 5 and 6, the lining brick 1 is attached to the hearth rib 2 with a mounting bracket 4 via a cushioning material 3. A sealing material 7 having gas impermeability, heat resistance, corrosion resistance against a Co gas atmosphere, and elasticity or thermoplasticity is applied over almost the entire gap between the mounting bracket 4 and the hole in the lining brick 1. It's filled. This prevents carbon from accumulating in the voids. In the embodiments shown in FIGS. 7 and 8, the lining brick 1 is attached to the hearth rib 2 with a buffer material 3 interposed therebetween by a mounting bracket 4. The gap 5 between the hole in the lining brick 1 and the mounting bracket 4 is partially filled with a sealing material 7. That is, the filling material 7 is filled in the side where the heating temperature is relatively low. That is, even if the sealing material 7 is provided only on the side of the oven lid rib 2, coke oven gas can be prevented from entering the gap 5 even with this configuration. Although various materials can be used as the sealing material 7, some preferred examples will be explained here.
Although there are exceptions depending on the application, in general the sealing material should be heat resistant, corrosion resistant to carbon dioxide atmospheres, and elastic or thermoplastic. An example of a sealing material having such properties is silicone rubber. Silicone rubber has good heat resistance and oil resistance, can be particularly molded into any shape, and is elastic, so it can completely fill voids and prevent gas from entering. Furthermore, even if the metal expands, it can be sufficiently absorbed and cracking of the refractory can be prevented. A comparison table with conventionally used fillers is shown in Table 1.

[Table] ○ in the table is good. Since other conditions are not necessarily the same, it is desirable to use a sealing material that suits the usage mode. The coke oven lid structure according to the present invention has gas impermeability, heat resistance, corrosion resistance against Co gas atmosphere, and elasticity or thermoplasticity in the whole or part of the gap between the hole and the fitting. Since the coke oven gas is filled with a sealing material, there is no risk that the sealing material will deteriorate or a gap will open due to the coke oven gas, and there is an excellent effect of reliably preventing the coke oven gas from entering the gap. This can prevent damage to the lining bricks, etc.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view showing an example of a conventional coke oven lid structure, Fig. 2 is a cross-sectional view of the conventional example shown in Fig. 1, and Fig. 3 is a longitudinal cross-sectional view showing another example of the conventional structure. 4 is a cross-sectional view of the conventional example shown in FIG. 3, FIG. 5 is a longitudinal sectional view showing an example of the coke oven lid structure according to the present invention, and FIG. 6 is a cross-sectional view of the conventional example shown in FIG. FIG. 7 is a vertical cross-sectional view showing another example of the coke oven lid structure according to the present invention, and FIG. 8 is a cross-sectional view of the embodiment shown in FIG. 7. 1... Lining brick, 2... Furnace lid rib, 3... Cushioning material, 4... Mounting bracket, 5... Gap, 6... Gap, 7... Sealing material.

Claims (1)

[Scope of utility model registration request] A lid rib of a coke oven, a lining brick provided along the lid rib, a hole formed in the lining brick, and a mounting for fixing the lining brick to the lid rib by inserting it into the hole. and a metal fitting, and the gap between the hole and the mounting metal fitting is entirely or partially filled with gas-impermeable silicone rubber to prevent coke oven gas from entering the gap. Characteristic structure of coke oven lid.