... .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 ... silicon granule is silver grey,grain,and it is mainly used in smelting,steelmaking and casting. Raw Material The ... ,95%, 75%, 65% and 45%, etc. Property Appearance: silver gray, massive, not powder Melting Point :1080-1250 °C ...