Black silicon carbide is quartz sand, petroleum coke as the main raw material, through high-temperature resistance furnace smelting is made between the hardness between corundum and diamond, the mechanical strength higher than that of corundum, brittle and sharp, with a certain degree of conductivity and heat. With its production of abrasives, adapted to processing low tensile strength of metal and nonmetal materials, such as gray cast iron, nonferrous metals, stone, leather, rubber, also widely used in refractory material, such as gray cast iron, nonferrous metals, stone, leather, rubber, also widely used in refractory, metallurgical additives. 
 Physical and chemical indicators of black silicon carbide 
 Size SiC FC Fe2O3 
 F10-F90 98.8 0.20 0.2 
 F100-F150 98.5 0.20 0.2 
 F180-F240 97.8 0.20 0.3 
 W63-W50 97.5 0.25 0.4 
 W40-W10 97 0.25 0.5 
 W7-W2.5 96.5 0.25 0.6