Using new technique, HC series grinding mills is an updated version of R series Raymond mills. For its high performance and energy saving., HC series grinding mill is considered the best choice for grinding almost any non-metallic minerals with Moh's hardness below 7 and moisture content below 6%, such as marble, calcite, limestone, feldspar, fluorite, gypsum, talc , barite, dolomite, granite, kaolin, bentonite, bauxite, phosphorite, figuline, black lead, clay etc. This kind of roller mill can produce particles ranging from 80 meshes to 800 meshes.