Lightweight high{{0}}alumina bricks are usually made of high-alumina bauxite clinker and a small amount of clay. After grinding, they are poured and formed in the form of mud by gas generation method or foam method, and fired at 1300-1500 degree . Sometimes industrial alumina can also be used to replace part of the bauxite clinker. It is used for the lining and heat insulation layer of masonry kilns, as well as the parts where there is no strong high temperature molten material erosion and scouring. When in direct contact with the flame, the surface contact temperature shall not be higher than 1350 degree . Lightweight clay bricks, thermal insulation refractories refer to refractories with high porosity, low bulk density and low thermal conductivity. fiber products. The characteristics of thermal insulation refractories are high porosity, generally 40 percent -85 percent ; low bulk density lower than 1.5g/cm3; low thermal conductivity, generally lower than 1.0W (m.K).
It acts as a thermal insulation material for industrial kilns, which can reduce the heat dissipation loss of the kiln, save energy, and reduce the quality of thermal equipment. The thermal insulation refractory material has poor mechanical strength, wear resistance and slag corrosion resistance, and is not suitable for the load-bearing structure of the kiln and direct contact with slag, charge, molten metal and other parts.
