... density is small 3.mainly used in smelting,steelmaking,casting. 4.0.5--2 mm,1--3mm ,3 ... density is small 3.mainly used in smelting,steelmaking,casting. 4.0.5--2 mm,1--3mm ,3 ... and it is mainly used in smelting,steelmaking and casting. Raw Material The ferro silicon granule takes the ... as the alloy agent and addition agent of steel and nonferrous metal. It widely plays a role in desulfurizating , ...