The Micro-Power Mill is mainly used to process materials into fine powder. The materials must be non-flammable and non-explosive such as kaolin, limestone, calcite, marble, China clay, feldspar, charcoal blacks, active carbon, and paint and so on with the hardness less than 6 in Moh's scale and humidity less than 8 percent. The product granularity can be changed from 500 meshes to 1250 meshes and the minimum is 2500 meshes.