Corundum bricks are mainly used in which kilns

Corundum bricks (containing Al₂O₃ > 90%) are primarily used in high-temperature critical equipment in the metallurgical, petrochemical, ceramics, and electronics industries due to their extremely high refractoriness (up to 1800℃ or higher), excellent resistance to chemical corrosion, and high mechanical strength.

Metallurgical Industry Furnaces

This is the largest application area for corundum bricks, mainly used in critical parts that withstand high temperatures, impacts, and slag corrosion.

Ironmaking Systems: The hearth and hearth of large blast furnaces (resisting molten iron penetration and corrosion), as well as the checker bricks and walls of blast furnace hot blast stoves.

Steelmaking Systems: The lining of ladle refining furnaces, sliding nozzles, slag lines in ladles, and the slide rails of rolling mill heating furnaces.

Petrochemical and Chemical Industry Furnaces

Utilizing their extremely high chemical stability and resistance to reducing gas corrosion.

Ammonia Synthesis/Gasification Units: Second-stage converters, waste heat boiler linings, and reaction chambers of fluidized bed gasifiers (such as those for processing coal-water slurry and petroleum coke).

Specialty Reactors: Carbon black reactors (resistant to high-temperature gas flow erosion), ethylene cracking furnaces, and ammonia decomposition furnaces.

Glass Industry

Glass melting furnaces: Primarily using fused zirconia-corundum bricks for key components such as furnace walls, pool walls, and channels in fiberglass pool furnaces.

Ceramics Industry

Specialty kilns: High-temperature tunnel kilns (as linings for kiln car platforms or direct flame contact areas), shuttle kilns, and pusher kiln tubes for the electronics industry.

Specialty High-Temperature Electric Furnaces

Widely used as linings or furnace tube materials for molybdenum wire furnaces, tungsten rod furnaces, induction furnaces, and single-crystal furnaces due to their high-temperature resistance and insulation properties.

Environmental Protection and Waste Treatment

In environmental protection equipment such as waste incinerators and waste liquid incinerators, their corrosion-resistant and wear-resistant properties protect furnace walls from alkali metal and acidic gas erosion.