Black corundum sand (also known as the end of the aluminum corundum, iron ore powder) is a new type of polishing material to Sanshui and a water-in-aluminum Fan soil is processed from raw materials through the arc high temperature smelting cooling. Black corundum abrasive grain concentrate, cutting and strong, willful, hardness and softness, abrasion resistance, high efficiency is mainly used for stainless steel, metal products, optical glass, bamboo products, polishing and sandblasting, is novel abrasive manufacturing resin grinding wheels, cutting discs, emery cloth .