Ball mill is the key equipment for material crushing after being crushed. It is widely used in cement, silicate products, new building materials, refractory materials, chemical fertilizers, black and non-ferrous metal dressing and glass and ceramics and other production industries, dry or wet grinding of all kinds of ores and other grindable materials. Ball mill is suitable for grinding all kinds of ore and other materials, is widely used in mineral processing, building materials and chemical industries, can be divided into dry and wet grinding two ways. According to the different way of ore discharge, it can be divided into two types: lattice type and overflow type.