Ball mill has been used in many industries for a long time, the technology is quite mature already. But there are still some problems, such as, lots of investors expressed that the metal balls are easy to be worn out and the energy consumption is quite high. So we optimized it. We improve the structure design and adopt new material, which obviously reduced the cost of spare parts. And we produce various types of ball mill to meet different requirements, for example, dry ball mill is mainly for producing common powder, wet ball mill is widely used in mineral dresssing.