... GB series 3.More than 90% exported 4.abrasive High purity,black silicon carbide abrasive1.High purity,SIC ... on cast iron, non-ferrous metal, rock, leather, rubber, etc. It is also broadly used as refractory material ... is the main raw materials of quartz sand , stone sand and petroleum coke. 2.It is made in ... on cast iron, non-ferrous metal, rock, leather, rubber, etc. It is also broadly used as refractory ...