Ball mill is the key equipment for materials smashing after the broken process is done. It is widely used in cement, silicate products, new building materials, refractory materials, fertilizer, ferrous and non-ferrous metals and glass ceramics and other production industries, a variety of ores and other grind-able materials can be dry or wet grinding. Ball mill can be applied to various kinds of minerals and other materials; furthermore, it is mainly used in beneficiation, building materials and chemical industries, wet type ball mill and dry type ball mill are two kinds of grindings. According to different ways of discharge, the ball mill can be divided into lattice type and overflow type; in another way, according to the different types of the cylinder, it can be divided into short-cylinder ball mill, long-cylinder ball mill, tube mill and conical mill. v