Ultra fine powder mill(Micronizer powder mill) is suitable for the super fine grinding of all kinds of crisp materials whose Moh's hardness is below 7, such as calcium carbonate, barite, dolomite, calcite, limestone, kaolin, bentonite, marble, gypsum, quartz, feldspar, clay, talc, fluorite, white mud, mica, refractory material, glass, total about 1000 kinds of materials.