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LM Series Vertical Mill

LM Series Vertical Mill
Introduction to the LM Series Vertical Mill:


LM-series vertical 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.
LM series vertical milling 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.

Working Principle of LM Series Vertical Mill:

The motor of the vertical mill drives the grinding table through decelerator. The materials fall down the center of grinding table from feed opening. At the same time, hot air comes into the Vertical Mill from the air inlet. Due to the centrifugal force, materials move to the edge of the grinding table. The materials are pulverized by the roller of the Vertical Mill when by pass of the groove on the grinding table. The crushed materials are brought up by vane high-speed airstream, the larger particles fall down to the grinding table for regrinding. When the materials in the airstream pass the separator on the top of the Vertical Mill, the coarse powder fall down the grinding table for regrinding under the function of rotation rotor. The fine powder comes out with the airstream,and is gathered by the dust catcher. The materials content with moisture will be dried when they meet the hot airstream. Through adjusting the temperature of the hot airstream, the Vertical Mill can meet different material’s requirement, and also through adjusting seperator, the Vertical Mill can reach proper fineness of materials.

Main Advanced Features:

1. Low Investment CostThis 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:
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%.
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 it has long life span..
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 It is equipped with automatic control systems, so remote control makes it easy to operate. 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 protectionIt 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.

 LM Vertical Mill Operation and Maintenance:

1,.When the vertical roller mill working, you should observe the wind speed and input air, and they can not be too small.
2 .Good control of material layer. If the material layer is too thick or too thin, it will cause the vertical mill shock.
3. The grinding materials can not have too large metal.
4 Keep the vertical mill’s main motor electric current and pressure gage steady.

Main Technical Data:

Ore Mill 

Contents|Data\Model
LM130K LM150K LM170K LM190K LM220K LM240K
Disc Dia. (mm) 1300 1500 1700 1900 2200 2400
Capacity (t/h) 10~30 13~40 18~57 23~72 36~114 41~128
Output fineness micron 170~45 170~45 170~45 170~45 170~45 170~45
mesh 80~325 80~325 80~325 80~325 80~325 80~325
Product moisture ≤1% ≤1% ≤1% ≤1% ≤1% ≤1%
Max.input size (mm) <38 <40 <42 <45 <50 <55
Best input moistrure <4% <4% <4% <4% <4% <4%
input moistrure(drying required) <15% <15% <15% <15% <15% <15%
Inlet air temperature () <350 <350 <350 <350 <350 <350
Outlet air temperature () 70~95 70~95 70~95 70~95 70~95 70~95
Main mill power (KW) 185~220 250~280 355~400 450~500 710~800 800~900
Dimension Lmm 3500 4200 4700 8500 10200 11700
Wmm 3400 3900 4500 5600 6700 7700
Gmm 5800 7100 8300 8800 10600 12200
Weight (t) 48 75 90 100 125 160
Notes:
1. Material should be with hardness less than 7 in Mohs.
2. Hot air is only necessary if outlet moisture is required to be less than inlet moisture. 
3.When grinding mateiral that is difficult to grind, please use the largest power. 
Coal Mill 

Contents|Data\Model
LM130M LM150M LM170M LM190M LM220M LM240M
Disc Dia. (mm) 1300 1500 1700 1900 2200 2400
Capacity (t/h) 10~15 16~22 20~28 26~35 35~45 40~50
fineness (R0.08) <15% <15% <15% <15% <15% <15%
Coal powder moisture <1% <1% <1% <1% <1% <1%
Max.input size (mm) <38 <40 <42 <45 <50 <55
input moistrure  <15% <15% <15% <15% <15% <15%
Inlet air temperature () <350 <350 <350 <350 <350 <350
Outlet air temperature () 75~95 75~95 75~95 75~95 75~95 75~95
Hardgrove index of raw coal (HGI) >55 >55 >55 >55 >55 >55
Main mill power (KW) 185 250 315 400 500 560
Dimension Lmm 3500 4200 4700 8500 10200 11700
Wmm 3400 3900 4500 5600 6700 7700
H mm 5800 7100 8300 8800 10600 12200
Weight (t) 46 75 94 100 122 157