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CP black silicon carbide is made from petroleum coke and high-quality silica as the main raw materials, and is smelted at high temperature in a resistance furnace. The smelted crystals have high purity, high hardness, and are composed of α-type hexagonal crystals. After personalized crushing, shaping, pickling, alkali washing, fine classification and other special processes, CP sand has a high concentration, cleanliness and superior hydrophilicity, making it a special material for coated abrasive tools.