Insulation Firebricks are energy-saving refractory materials with mullite as the main component. They are made of high-purity raw materials and special processes. They have excellent high-temperature stability, thermal shock stability and mechanical strength, and also have low thermal conductivity characteristics. It is widely used in the lining and insulation layer of kilns in metallurgy, machinery, ceramic chemicals and other industries, and can directly contact flames, such as blast furnaces, heating furnaces, heat treatment equipment and chemical kilns.