Ⅰ. Usage and Features This kind of machine is a high quality and low consumption ultrafine mill that developed and researched by our engineers. It is a new mill that adopts advanced grinding technology both at home and aboard. The machine solves the problem of low efficiency and high cost that air mill has. The performance of the machine has been proved by hundreds of users, and it improves the grade and additional value, so it can generate a higher profit margin. The purpose of the machine is for fine grinding materials which hardness less than 6 in Moh’s scale and humidity less than 6 percent such as kaolin, limestone, calcite, talcum, marble, barite, gypsum, dolomite, bentonite mud, isinglass, pyrophyllite, sepiolite, diatomite, graphite, alnuite, fluorite, potasium feldspar, phosphorite pigment and so on. The granularity of the end products is 325-2500 meshes (0.044-0.0055mm).