Vertical roller mill is one advanced mill, adopting top technology domesic and abroad, and based on many years’ mill experiences. It can crush, dry, grind, and classify the materials. Vertical roller mill machine can be widely used in such industries as cement, power, metallurgy, chemical industry, non-metallic mineral. It is used to grind granular and powdered materials into powder with required fineness.

Vertical roller mill Technical Advantages:

1. Low Investment Cost
This mill itself can crush, dry, grinding, classifying, so the system is simple, and occupation area is about 50% of ball mill system. In addition, it can be installed outside, so it will reduce a large number of investment costs.

2. Low Operation Cost
⑴ High efficiency: roller compacted materials directly onto the grinding disc, so power consumption is low. Compared with ball mill, it saves energy consumption by 30% ~ 40%.
⑵ Less wear and tear: As the roller is not in direct contact with the disc, and material of the roller and liner is high quality, so life lime is long.

3. High Drying Ability
As the hot air inside contacts directly with the material, drying ability is higher, and it saves energy. By regulating the air temperature, it can meet requirements with diffirent humidity.

4. Simple and reliable operation
⑴ It is equipped with automatic control systems, so remote control makes it easy to operate.
⑵ It is equipmented with one device,which prevents the roller from contacting with the liner directly, and avoids the destructive impact and severe vibration.

5. the stability of product quality
As the material stays in the mill for a short time, it is easy to detect and control the product particle size and chemical composition, to reduce duplication of milling, stable product quality.

6. Maintenance convenience
By reparinging fuel tank, rotating the arm, it is fast to replace the roller sleeve, and liner, and reduce the downtime loss.

7. Environmental protection
It is with small vibration, low noise, and the overall sealing. The system works under negative pressure, so there is no dust going out. It meets the requirements of the state Environmental Protection.

Working principles of the Vertical roller mill:

The motor dives the grinding table to turn the through the speed reducer.

At the same tim, 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 form the centre.

The materials are crushed by the grinding roller when by pass of the groove on the grinding table.

The crushed 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 ai rstreamy.

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.

Technical Data:

Note: 1. Input material should be brittle material with Mohs hardness not more than seven.
2. Hot air is needed only when there is a requirement that water percentage of final product should be less than raw material.
3. If the material is hard to grind, motor power take large value.

LM Vertical Coal Mill Specification

If there is change of the above specification, it subjects to the newest products' specifications.