Graphite Powder, Silicon Carbide, Recarburizer manufacturer / supplier in China, offering High Purity Black Silicon Carbide Sic90% 0-10mm 1-10mm 0-50mm Used for Deoxidizing Foundry and Refractory, Black Sintered Silicon Carbide Sic in High Temperature Furnace for Iron Industry, China High Purity Sic90% Size 0-50mm 0-10mm 1-10mm Black Silicon Carbide Used for Steel Making and Foundry Factory and so on.