... fused and crystallized under high termperature form of materials Brown Corundum,fuesd alunminaBrown Fused Alumina is bauxite, ... hard bronze etc. grinding. In addition, in refractory materials, chemical additives, precision casting and anti-slip material also ... human body joints, sealing ring mold. (3) corundum insulating materials, such as lightweight corundum brick, corundum hollow ball and ...