Vertical Roller Mill

Introduction of vertical cement mill
vertical cement mill is mainly used to grind cement clinker into fine powder during cement production, which can also be used to grind various materials such as calcite, marble, limestone, coarse whiting, talc, barite and dolomite etc. It combines drying, grinding and separation process into just one unit, making the footprint of the installation smaller and reducing the civil engineering costs, the cost of a vertical cement mill project is around 20 – 25% greater than a ball mill system of the same capacity.
Work principle
the materials drop to the center of the grinding table through the feed tube, and the grinding table, which is rotating at constant speed, scatters evenly the material to the outside by means of centrifugal force, making it form material bed with certain thickness. Meanwhile, the material is rolled and smashed by multiple rollers. The material gradually move to the fringe of the grinding table under the continuous of fringe force, when the leaving material meets the hot gas enter into mill through the vane and moves upward, entering the separator through the central casing of the mill, the material and the gas achieve sufficient exchange and moisture is evaporated quickly in the process. Powder concentrator controls the granularity of finished product at exit of roller mill, granules that are larger than regulated size are separated and fall to the grinding table, while those materials satisfying the fineness requirement enter the finished product storehouse through the powder concentrator.