... widely used in aluminum, copper material glass, washing jeans precision mould, etc; 2. Free grinding, grinding grade abrasive, applied in ... die, crowded pencil refill die nozzle, etc.; Do tool, mould abrasive, bulletproof material, human body joints, seal die ring, ... brown corundum block, adopts the roll, ball mill, and mark equipment processing and become, particle size by F8 - F325. Mainly used ...