Silicon carbide (SiC), also known as silicon carbide. Pure colorless crystals. Density of 3.06 to 3.20. Great hardness, which is about 9.5 degrees Mohs. Generally a colorless powder particles. After grinding, can be used for grinding powder, it can be rubbed glossy paper, but also the system's friction surface grinding wheels and grindstones. From the sand and the amount of carbon in an electric furnace to enhance thermal system. Natural corundum, also known garnet, Department of silicate minerals. After hydraulic sorting, mechanical processing, filtering, classification methods such as abrasive material made. Production and use has a long history of ancient China had to use emery grinding crystal glass, a variety of jade history of cases. 1840s and exported to Japan. Sub-coarse mesh, mesh, breakdown of three categories. Coarse mesh of black and red, the head is pale red, breakdown of red and white, various heads of uniform particle size, particle shape uniformity into the edge called the angle of crystal, sharp edges, grinding force. Class industrial grinding stone for marble and other soft materials. Glass industrial grinding glass edges, TV kinescope, optical equipment, lenses, prisms, clocks, glass and so on. Metal industrial sandblasting, rust, grinding. Grinding offset printing industry, as well as light industrial processing of plastic-like, leather, sandpaper and other purposes. Natural corundum corundum grinding force slightly lower furnace, but its self-willed, and has a shell-shaped segment of the population characteristics, and its advantage is sharpened piece finish, sand marks few and shallow. Fine and uniform grinding can improve product quality, our products unique. Natural corundum grinding time is short, high efficiency, low cost, short life can compensate for deficiencies.