Emery (sic), also known as silicon carbide, silicon carbide is a colorless crystal of pure, colorless powder particles. Density of 3.06 to 3.20, Mohs hardness of about 9.5 degrees. Pure silicon carbide abrasive powder can be done after grinding, polishing paper can also be prepared, and also can be prepared by grinding the friction surface whetstone. Natural corundum also called Garnet sand is silicate minerals. The hydraulic sorting, mechanical processing, filtering, classification methods such as abrasive material made. Natural corundum into coarse mesh, mesh, broken down into three categories, which the coarse mesh of black and red, the head is pale red, breakdown of red and white. North Branch Green Clean Environmental Technology emery filter produces a variety of mesh size uniform, uniform particle shape, into a water chestnut crystal, sharp edges, grinding force. Can be used in industrial grinding stone marble and other soft materials, glass industrial grinding glass edges, TV kinescope, optical equipment, lenses, prisms, clocks, glass and so on. Metals for industrial sandblasting, rust, grinding. Grinding offset printing industry, as well as light industrial processing of plastic-like, leather, sandpaper, etc.. 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, is emery unique. Natural corundum grinding time is short, high efficiency, low cost, short life can compensate for deficiencies. Natural corundum for sand blasting, blasting, polishing and other purposes.