... 2.density is small 3.mainly used in smelting,steelmaking,casting. 4.0.5--2 mm,1--3mm ,3--8mm,3 ... 2.density is small 3.mainly used in smelting,steelmaking,casting. 4.0.5--2 mm,1--3mm ,3--8mm,3 ... ,grain,and it is mainly used in smelting,steelmaking and casting. Raw Material The ferro silicon granule takes the coke, scrap ...