White fused aluminawhite, harder and more brittle than strong cutting force and steady chemical stability is good, has the very good insulation. White corundum with industrial alumina powder as raw material, regularly over 2000 degrees in the arc after cooling in high temperature melting, after smashing plastic, magnetic separation to iron, screen is divided into a variety of particle size, dense texture, high hardness, granular form sharp corners. Can be materials, etc. Suitable for machining hardened steel, alloy steel, high speed steel, high carbon steel hardness is harder, such as tensile strength of the larger materials. Can also be used to do touch media, insulator and precision casting sand, etc. Can also be applied to large steel castings, especially the type alloy casting, core sand, coating and investment casting shell making material, at the same time can be used as hardened steel, alloy steel, such as half fine grinding, fine whet.