(1) Classified by material composition
Phosphate bricks: low refractoriness, but high strength and good thermal shock resistance, often used for grate coolers and kiln hood.
Silicon carbide brick: It has good resistance to high temperature, rapid cooling and heating, and wear resistance, and is suitable for cooling belts and kiln mouths.
Silicon Mo brick: Good thermal shock resistance, high strength, good wear resistance, suitable for transition bands.
High alumina refractory brick: The mineral composition consists of corundum, mullite, and glass phase. The raw materials are natural ores such as high alumina bauxite and sillimanite, as well as those mixed with fused alumina, sintered alumina, synthetic mullite, and clinker calcined with alumina and clay in different proportions, which are mostly produced by sintering method. Widely used in the steel industry, non-ferrous metal industry, and other industries.
Silicon brick: It is the main variety of acidic refractory bricks. It is mainly used for building coke ovens, as well as for the arch roofs and other load-bearing parts of various thermal kilns for glass, ceramics, carbon calcination furnaces, and refractory bricks. It is also used in the high-temperature load-bearing parts of hot blast stoves, but it is not suitable for use in thermal equipment with temperature fluctuations below 600 ℃.
Clay bricks: are commonly used refractory bricks in blast furnaces, hot blast stoves, heating furnaces, power boilers, lime kilns, rotary kilns, ceramic and refractory brick firing kilns.
(2) Classified by production process
Sintered bricks: High alumina refractory bricks are often produced by sintering method, which involves mixing and shaping the raw materials before sintering them.
Melting and casting bricks: Raw materials are melted at high temperatures through processes such as blending and fine grinding, and then directly cast. After cooling, crystallization, and annealing, they become products such as melting and casting mullite bricks, corundum bricks, and magnesia bricks. Its body is dense, with high mechanical strength, strong high-temperature structural strength, and good slag resistance.
Amorphous refractory brick: composed of granular and powdery refractory materials, which can be made of various materials according to usage requirements. In order to combine these refractory materials into a whole, appropriate types and quantities of binders are generally added, and a small amount of plasticizing and water reducing agents or other additives can be added as needed.