... and sandblasting precision sand mold corrosion resistance aluminium powder 1. advantage:1, Grinding short time, high efficiency, low ... user’s different requirement, choose corresponding types of alumina thick powder ball-milling. Variety: 47um,5um,4um,3um,2um3. Application ... compact size, light strength and good energy efficiency. Low grade silicon carbide is an excellent deoxidizer.2) It can speed ...