... ,JIS,GB series3.More than 90% exported1.DescriptionBlack silicon carbide is produced at high temperature in an electric ... metal, rock, leather, rubber, etc. It is also broadly used as refractory material and metallurgical additive.2.Chemical compositionBlack Silicon ... 3.Black crystal, hardnessBlack silicon carbide abrasives are suitable for working on cast iron, non-ferrous metal, rock, leather, rubber ...