Corundum brick

Corundum brick refers to refractory products with alumina content greater than 90% and mainly containing corundum crystal phase. High room temperature compressive strength (up to 340MPa). High load softening onset temperature (greater than 1700 ° C). Very good chemical stability, strong resistance to acidic or alkaline slag, metal and glass liquid. The thermal shock stability is related to its microstructure. The dense products have good corrosion resistance, but the thermal shock stability is poor. Divided into sintered corundum brick and fused alumina brick. Sintered alumina and fused alumina can be used as raw materials or alumina clinker with a high Al2O3 / SiO2 ratio can be combined with sintered alumina and sintered. Non-fired corundum bricks can also be made with phosphoric acid or other binders. Mainly used in ironmaking blast furnaces and hot blast furnaces for blast furnaces, refining furnaces outside steelmaking furnaces, sliding water heaters, glass melting furnaces and furnaces in the petrochemical industry.

Corundum bricks have been widely used as lining materials in petrochemical thermal equipment with high temperature, high pressure, chemical erosion and severe mechanical wear. With the advancement of production technology in the petrochemical industry, many new processes and technologies have been used in production. To achieve the goals of large load, long cycle, low energy consumption and low cost, in addition to the transformation of various thermal equipment, higher requirements are also placed on the lining materials of various thermal equipment. For this reason, a series of products with high temperature resistance and corrosion resistance have been developed to meet the needs of the petrochemical industry.