What is the difference between white corundum section sand and white corundum particle size sand?

It is slightly harder than brown corundum, slightly lower toughness, high purity, good self-sharpening, strong grinding ability, low heat generation, high efficiency, acid and alkali corrosion resistance, and good thermal stability at high temperature. It is suitable for grinding high speed steel, high carbon steel, etc. It is widely used in cemented abrasives, coated abrasives, polishing and precision casting industries.