Black silicon carbide series: Black silicon carbide series: Black silicon carbide crystalline block is got from the main raw material of quartz sand, petroleum coke and high-quality silica, smelted through the high-temperature resistance furnace. The hardness is between corundum and diamond, the mechanical strength is higher than corundum and diamond, the mechanical strength is higher than corundum’s, crisp performance and sharp. Black silicon carbide powder: Black silicon carbide crystal block, pass the mechanical crushing and chemical treatment, and then air classification or hydraulic classification to get different types of powder. Uses: multi-purpose abrasives grinding materials such as grinding wheel, sanding belt etc, refractories etc.