... Roller Mill / Vertical mill Vertical Mill HRM Vertical Mill applies to grind coal, coke, cement raw material, gypsum, barite, phosphorite, calcite ... in-size is bigger; Degree of product fineness is easier to adjust; Chemical composition is steady; No steel ball impact; No ... ; Low wear; There is separator in mill, no need to match powder concentrator; Small cover area; Grinding rollers can be taken out ...