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The selection of acid-resistant bricks depends on the actual use of the site, the service temperature, pressure, bulk density requirements, and so on to make the final choice.

The low porosity high alumina brick has low porosity and strong corrosion resistance, low creep high alumina brick is used in different conditions of furnace lining.

The refractory ramming mass materials types are no more than refractory castable, but the application effect of the small blast furnace iron ditch skim and branch ditch, slag ditch is indeed better than the performance of refractory castable, with the actual use of the market continues to evolve, ramming materials also have the direction of continuous technical improvement, such as composite ramming materials, it is suitable for use in the case of complex lining atmosphere.

The coke oven door is frequently opened during production, the surface temperature is high, and the coke temperature changes greatly. Cordierite brick and clay brick are used in the lining of traditional coke oven door in China, but the service cycle is not long.

While the properties of composite refractory castable can be used, it can be made into prefabricated blocks, which is convenient for construction and has a long service cycle. Therefore, the use of clay and fused quartz composite refractory castable is most suitable for the use of coke oven doors.

After the castable is added with retarding agent, it cannot be used without fluidity, because the castable has difficulty condensing without fluidity, which seriously affects the strength of the castable.

High alumina brick is a kind of middle grade Fire brick among the stereotyped products of refractory materials. It belongs to neutral refractory materials and is used in the lining of industrial kilns.