It refers to white corundum products with particle sizes ranging from 0-1mm, 1-3mm, 3-5mm, 5-8mm, 100 # – 0, 200 # – 0, and 320 # – 0. The high-quality white corundum bulk produced by the smelting workshop is transported to the section sand production workshop, crushed by a coarse crusher, and then screened to finally obtain a white corundum product with a particle size within a certain range. Mainly used as shaped refractory, amorphous refractory, and floor sand applications.