Black silicon carbide, quartz sand, petroleum coke and high-quality silica as the main raw materials in electric arc furnace smelting. Hardness between corundum and diamond, the mechanical strength is higher than corundum, is brittle and sharp. 
 Black silicon carbide industrial method for making high-quality quartz sand and petroleum coke in a resistance furnace refining. Refining of silicon carbide blocks, crushing, acid and alkali washing, magnetic separation and sieving or water election made various size products. 
 Black silicon carbide containing SiC approximately 98.5%, higher toughness than the Green Silicon Carbide, mostly for processing tensile strength materials, such as glass, ceramics, stone, refractory material, cast iron and nonferrous metals. 
 Chemical stability, high thermal conductivity, thermal expansion coefficient, good wear resistance, except for abrasive use, there are many other uses, such as: black silicon carbide powder coating on the inner wall of the turbine impeller or cylinder body in a special process can improve the wear resistance and extended service life of 1 to 2 times; used made of high-grade refractory, thermal shock resistance, small size, weight, light and high strength, good energy saving effect. In addition, black silicon carbide is also used extensively for the production of electric heating elements silicon carbide.