... furnace to restore the system obtained brown artificial corundum, and are thus brown corundum. Brown Fused Alumina is the main chemical ingredient AL2O3 ... to carbon steel, malleable iron and hard bronze etc. grinding. In addition, in refractory materials, chemical additives, precision ... die nozzle pencil lead, etc.; do tool, die grinding, bullet-proof material, the human body joints, sealing ring ...