Ball Mills are mainly used in metallurgy, chemical industry, electric power, cement and other industrial and mining business to make all kinds of ores and other grindable materials by virtue of such characteristics as strong adaptability to raw materials, excellence in continuous production, high crushing ratio and easy to adjust the fineness of the finished product. An open or closed system can be set as required according to the production model, the dry and wet process production can be adopted or the grinding and drying operations can be completed at the same time.