Refractory clay bricks are high-temperature materials made from clay clinker as aggregate and refractory clay as binder. Their alumina (Al₂O₃) content is typically between 30% and 48%. Due to their excellent thermal shock resistance, wear resistance, and relatively low cost, they are widely used in high-temperature industries.
Iron and Steel Metallurgy Industry
The iron and steel industry is the largest consumer market for clay bricks, mainly used for lining various thermal equipment.
Blast Furnaces: Used in the furnace body, throat, hearth, and bottom of blast furnaces, requiring high strength to resist wear from the furnace charge.
Hot Blast Stoves: Used in the furnace walls, regenerators, and partitions of hot blast stoves, utilizing their good thermal shock stability to withstand drastic temperature fluctuations.
Coke Ovens: Used in coke ovens for non-load-bearing parts such as furnace doors, riser pipe linings, and regenerator sealing walls, where temperature fluctuations are significant.
Steel Ladle: In the steelmaking process, clay bricks are also used as linings for steel ladles and in steel casting systems.
Building Materials Industry
Clay bricks also play a crucial role in building materials production.
Cement and Glass Furnaces: Primarily used in the lower part of the regenerator chamber, flue, and preheating and decomposition zones of cement rotary kilns. In these areas, clay bricks mainly serve as working linings or insulation layers.
Ceramics Industry
Ceramics and Refractory Materials Firing: Clay bricks are used as linings for various tunnel kilns and shuttle kilns, serving as materials supporting kiln walls and roofs.
Chemical and Petrochemical Industry
Clay bricks are used in fertilizer gasifiers, coke ovens, and heating devices and reaction chambers in the chemical industry to resist chemical corrosion.
Power Industry
Clay bricks are used in the thermal insulation of power boilers and as linings for chimneys and flues.
Non-ferrous metal smelting industry
Clay bricks are used in non-ferrous metal smelting furnaces and various heat treatment furnaces, soaking furnaces, and annealing furnaces. They also serve as the base material for various industrial flues.
Overall, refractory clay bricks, with their wide applicability and high cost-effectiveness, cover almost all industrial sectors that require high-temperature thermal equipment.
