It belongs to white corundum segment sand, and products with a particle size of 0 to a certain size in the segment sand are also referred to as fine powder. It is the product that passes the finest screen in the production line of white corundum segment sand. The general models are: 100 # – 0, 200 # – 0, 320 # – 0, and 0-1mm. It can be used as high-quality refractory powder for shaped and unshaped refractory materials. At the same time, white corundum fine powder can also be further grinded, processed, and screened into white corundum fine sand and white corundum fine powder.