Al2O3: 48-80%;
Refractoriness Under Load: 1420-1530℃
Cold crushing strength: 40-70MPa
Standard Size: 230*114*65mm
High alumina brick is a kind of aluminum silicate refractory product with aluminum oxide (Al2O3) content higher than 48%. It is formed and calcined from bauxite or other raw materials with high alumina content. High thermal stability, refractoriness above 1770°C. It has good slag resistance and is used for the lining of masonry steelmaking electric furnaces, glass melting furnaces, and cement rotary furnaces.
High refractoriness: They can endure high temperatures up to 1750 - 1800°C, maintaining good structural stability and mechanical properties under high - temperature conditions.
Load Softening Temperature: Because the Al2O3 in high alumina products is high, the amount of impurities is less, and the formation of fusible glass is less,.
Excellent slag resistance: The content of Al2O3 in high alumina bricks is high, which is close to neutral refractory materials, and can resist the erosion of acid slag and alkaline slag.
High Mechanical Strength: With high compressive strength and flexural strength, they can bear the weight of the furnace structure and the materials in the furnace.
Low Thermal Conductivity: Low thermal conductivity means they provide excellent insulation and help reduce heat loss.
High alumina bricks are popularly used for the masonry of industrial kilns inner linings, such as blast furnaces, hot blast furnaces, electric furnace top, reverberator, rotary cement kiln and so on. Besides, high alumina bricks are also widely used as regenerative checker bricks, stopper of continuous casting system, nozzle bricks, etc.
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