With high quality bauxite as raw material, it is produced in the based of smelting the vice-white fused alumina, adjusting smelting process and ratio of raw materials, melting at the high temperature of above 2100In the electric furnace, and using a special broken treatment technique. Since its hardness and toughness is between white fused alumina and brown fused alumina, it is called semi-friable fused alumina. It is characterized by high temperature resistance, corrosion and erosion resistance, low apparent porosity and stable thermal stability. Its grain is characterized by strong self-sharpening, sharp grinding edges and not easy to burn workpiece. After the grain of semi-friable fused alumina is processed, the relative ability of grinding  resistance of semi-friable fused alumina? increase, which is particularly applicable for grinding thermosensitive steel and alloy, low hardness, lower non-ferrous metal materials such as aluminum, copper, zinc, plumbum and non-metallic materials such as wood, plastic, and it is widely used for the production of bonded and coated abrasives.