Ball mill is the most commonly used grinding equipment. It is widely used in cement, silicate products, new building materials, refractory, fertilizer, non-ferrous metal, glass ceramic and other industries. Ball grinder mainly grind various ores and other grind-able materials. This type of ball grinder can be divided into dry grinding and wet grinding. Ball mills are mainly composed by the components of cylinder, driving big gear ring, end cap, bearing and so on. The ball mill is a key piece of equipment for grinding crushed materials, and it is widely used in production lines for powders such as cement, silicates, refractory material, fertilizer, glass ceramics, etc. as well as for ore dressing of both ferrous non-ferrous metals. The ball mill can grind various ores and other materials either wet or dry. There are two kinds of ball mill, grate type and overflow type due to different ways of discharging material. There are many types of grinding media suitable for use in a ball mill, each material having its own specific properties and advantages.