Silicon Carbide Graphite Crucible Silicon carbide crucibles are used to smelt various non-ferrous metals such as gold, silver, copper, aluminum, lead-zinc, medium carbon steel, various rare metals and carbon products. Suitable for metal smelting in ground furnaces, electric furnaces, intermediate frequency furnaces and high frequency furnaces. Silicon Carbide Crucible Advantage Silicon carbide crucible has the advantages of energy saving, environmental protection, high oxidation resistance, less pollution, fast thermal conductivity, good thermal conductivity, small thermal expansion coefficient, fast thermal conductivity, and strong resistance to rapid thermal quenching strain.