White corundum fine powder is selected from the high-quality white corundum fine powder produced in the production line of white corundum section sand, which is further crushed and shaped by tube grinding, and is subjected to magnetic separation to remove iron, acid pickling, and moisture. Widely used in grinding and polishing of semiconductors, crystals, circuit boards, aluminum, steel, stainless steel, stone, glass, etc., as well as coatings, fillers, etc. Particle size specification and composition