As we all know, lightweight high-alumina bricks and heavy-weight high-alumina bricks are refractory materials widely used in the kiln industry. Lightweight high-alumina bricks are currently one of the ideal heat-insulating refractory materials. They have the characteristics of high compressive strength, low thermal conductivity, good insulation performance and low price. They are now widely used in porcelain monastic kilns and roller conveyors. Kiln, shuttle kiln, wall kiln are not used in various heating furnaces, coke ovens and other thermal equipment in the steel industry to heat treat materials and have broad market prospects.