vertical roller mill working principle:
The motor dives the grinding table to turn through the speed reducer. At the same time, hot air comes into the roller mill from the air inlet. The materials

fall down the centre of grinding table from the feeder. Because of the centrifugal force, the materials move to the edge of grinding table from the centre

.The materials are crushed by the grinding roller when by pass of the groove on the grinding table. The crusher materials continue to move to the edge of the

grinding table until taken away by the airstream. Then the bigger materials fall down the grinding table and the process of crushing continues. When the

materials in the airstream pass the separator on the top of the mill, the materials fall down the grinding table from the taper filler under the force of

guide leaf blade. The fine powder comes out with the airstream, and is gathered by the dust catcher of the system. The powder gathered is the final product of

roller mill. In the process of the contact of airstream , the materials are dried to meet the clients’ need at the proper moisture.　Through the adjustment

of the angle between the separator and the leaf of wind’s direction (not suitable to the small type of vertical mill), and also the speed of the separator

rotor, it can reach the proper fineness of the materials.

vertical roller mill feature:
1. stability of product quality: As the time of material stays in the grinding is short, easy to detect and control the product particle size and chemical

composition, reduce duplication of milling, stable product quality.
2. Easy maintenance: Through to maintain of tanks, turn rotating arm, replacement roller sleeve, lining convenient ,reduce the downtime.
3. Environmental Protection: a small of vibration, low noise, and the whole device be airproofed, the system to work under negative pressure, no dust spill,

meet national environmental protection requirements.

The invention is a vertical mill grinding grain by rural stone nianzi inspired. Modern vertical milling machine is developed from l906 onwards, it has been

constantly improved over the past century has experienced a roller by centrifugal force to pressure to use the spring pressure, to the present system with a

hydraulic pressure pneumatic springs. By grinding material from the soft to medium hard coal for cement raw materials to brittle cement clinker and slag. For

the cement industry for the invention of new dry calciner, rotary kiln production of double and large, make vertical milling machine structure has been

continuously improved and large, to meet the requirements of a kiln with grinding.