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Refractory bricks can be divided into fired bricks, non-fired bricks, fused-cast bricks (fused-cast bricks), and refractory insulation bricks according to the preparation process; they can be divided into standard bricks, ordinary bricks, special-shaped bricks, etc. according to their shape and size. . It can be used as high-temperature building materials and structural materials for building kilns and various thermal equipment, and can withstand various physical and chemical changes and mechanical effects at high temperatures.