... 2. long lifetime of spare parts 3. high safety and reliability High Quality Micro Powder Grinding MillThe Three Ring Micro Power ... such as kaolin, limestone, calcite, marble, talcum, barite, gypsum, dolomite, bentonite mud, mica, pyrophyllite, sepiolite, diatomite, graphite, alunite, fluorite ... third layer and are crushed and ground. The high pressure centrifugal blower inhales air from the outside and ...