with qualified products and good service, we suppy series raymond roller mill, which is suitable for grinding barite, calcite, potash feldspar, talcum, marble, limestone, ceramics, etc. whose mohs' hardness is below 7 scales and humidity does not exceed 6% and other non-inflammable and non-explosive material. raymond roller mill 3r2715 number of roller: 3 diameter of roller: 270mm height of roller: 140mm inside diameter of ring: 830mm height of ring: 140mm max. feeding size: 15-20mm fineness of product: 0.044-0.165mm capacity: 0.9-3.8 t raymond roller mill 4r3216 number of roller: 4 diameter of roller: 320mm height of roller: 160mm inside diameter of ring: 970mm height of ring: 160mm max. feeding size: 20-25mm fineness of product: 0.044-0.165mm capacity: 1.8-4.5 t raymond grinding mill 5r4121 number of roller: 5 diameter of roller: 410mm height of roller: 210mm inside diameter of ring: 1270mm height of ring: 210mm max. feeding size: 20-25mm fineness of product: 0.044-0.125mm capacity: 5-8 t