Definition Of Corundum Brick

Corundum brick refers to refractory material products with alumina content greater than 90% and corundum as the main crystal phase. High room temperature compressive strength (up to 340MPa). The starting temperature for high load softening (greater than 1700 ℃). Good chemical stability, strong resistance to acidic or alkaline slag, metals, and glass liquids.
The thermal shock stability is related to its organizational structure. Dense products have good corrosion resistance, but poor thermal shock stability. It is divided into two types: sintered corundum brick and fused corundum brick. Sintered alumina and fused alumina can be used as raw materials separately, or alumina clinker with a high Al2O3/SiO2 ratio can be combined with sintered alumina and produced by sintering method. Non burnt corundum bricks can also be made using phosphoric acid or other binders. Mainly used for ironmaking blast furnaces, blast furnace hot blast stoves, refining furnaces outside steelmaking furnaces, sliding water heaters, glass melting furnaces, and petrochemical industrial furnaces.