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Brief introduction of silica-alumina refractory brick

 Any stove is not built with only one type of refractory bricks. It requires the use of different refractory bricks.
It is reported that the silica-alumina refractory brick is based on the phase diagram of the binary system of AL2O3-SiO2, which mainly includes the following.
(1) Silicon bricks refer to refractory bricks containing more than 293% SiO, and are the main varieties of acid refractory bricks. It is mainly used for masonry coke ovens, but also for the vaults and other load-bearing parts of various glass, ceramics, carbon calcining furnaces, refractory bricks. It is also used in high-temperature load-bearing parts of hot blast stoves, but it should not be used in Used in thermal equipment below 600 ° C and with large temperature fluctuations.
(2) Clay bricks. Clay bricks are mainly composed of mullite (25% to 50%), glass phase (25% to 60%), cristobalite and quartz (up to 30%). Generally, hard clay is used as the raw material, the mature material is calcined in advance, and then the soft clay is mixed, and the semi-dry method or the plastic method is used to mold the clay brick products at a temperature of 1300 to 1400 C. You can also add a small amount of water glass, cement and other binders to make unfired products and amorphous materials. It is a commonly used refractory brick in blast furnace, hot blast stove, heating furnace, power boiler, lime kiln, rotary kiln, ceramics and refractory brick firing kiln.
(3) High alumina refractory bricks. The mineral composition of high alumina refractory bricks is corundum, mullite and glass. The content depends on the ratio of AL2O3 / SiO2 and the type and quantity of impurities. The grade of refractory bricks can be divided according to the content of AL2O3. The raw materials are natural bauxite of high bauxite and sillimanite. There are also fused alumina, sintered alumina, synthetic mullite, and clinker calcined with alumina and clay in different proportions. It is mostly produced by sintering. However, the products also include fused cast bricks, fused grain bricks, unfired bricks and amorphous refractory bricks. High alumina refractory bricks are widely used in the iron and steel industry, non-ferrous metal industry and other industries.
(4) Corundum refractory brick. Corundum brick refers to a type of refractory brick with the content of AL2O3 not less than 90%, and corundum as the main phase.
If you are interested in our fused azs bricks, or need other types of refractory materials, please contact our Tianyang Refractory Group, we will definitely provide you with the best quality refractory materials and the most reasonable quotation.

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