Description of Corundum Brick Corundum bricks are refractory products with corundum as the main crystal phase, in which the Al2O3 content is greater than 90%. High normal temperature compressive strength (up to 340MPa). High load softening start temperature (greater than 1700°C). Good chemical stability, strong resistance to acidic or alkaline slag, metal and glass liquid. The thermal shock stability is related to its structure, the corrosion resistance of dense products is good, but the thermal shock stability is poor. There are two types of sintered corundum bricks and fused corundum bricks. Corundum bricks mainly used in iron-making blast furnaces and blast furnace hot blast stoves, refining furnaces outside steel-making furnaces, sliding water heaters, glass melting furnaces and petrochemical industrial furnaces, etc.