Main coal powder production equipment in this project is a star product of our company -YGM130 high-pressure medium speed mill. Fineness of finished powder is even, which increases combustion efficiency in coal powder boilers, raises production and reduces the pollutant emissions. High Pressure Medium Speed Mill is called High Pressure Grinder for short. It is a new type of grinding equipment which a design institute in our company devote themselves to developing and producing on the basis of being engaged in the study of fine mill equipment for many years. It creates a new era of high efficiency and low energy consumption in international industrial milling field.