grinding mill

[Feed size]: 38-55mm

[Production capacity]: 10-50T / h

[Applications]: For cement, power, metallurgy, chemical industry, ore milling materials and other industries.

[Applicable materials]: cement, coal, feldspar, calcite, talc, fluorite, iron ore, copper,

phosphate rock, graphite, quartz and slag.

As the cement production process the main processing equipment, LM vertical milling machine not only for cement powder fineness good production results, while in accordance with standard cement products for the construction market attention size distribution, yield and quality through double protection help enterprises to obtain good value for money. LM vertical mill in cement mill line range of applications will be further expanded its market prospects worth the wait.

Working principle of vertical grnding mill

Main motor through the speed reducer drives the grinding disc to rotate, while the hot air from the air inlet into the vertical mill body, the material through a feed fall in the center of the disc, under the action of centrifugal force, material from the disc center to edge uniformly moving, through the upper millstone grinding roller area by grinding roller of roller compacted, the bulk material is crushed, fine material by extrusion forming bed material interparticle breakage. Crushed materials continue to move to the edge of the grinding disc, until the wind ring strong airflow taken and flow with material, larger particles under its own gravity again fall to the disc to smash, the rest of the material, with the air into the high dynamic separator, powder classification, in the role of efficient dynamic blade separator, does not meet the requirements of the fineness of the material back to the millstones for grinding, and in line with the requirements of the fineness of the material with the gas flowing through the pipes into the pulse dust collector to collect, by discharging device discharge is refined powder. Host within the mixed material of iron and other hard grinding debris with the material is moved to the edge of the grinding disc, due to its own weight and can not be blown up by the wind, fell mill cavity is mounted on the disc at the bottom of the scraping plate scraped into the slag outlet after discharge the external host.

Products Advantages

  1. Investment and operation cost is low: set of crushing, drying, grinding, grading conveying in one, simple system, compact layout, covers an area of about 50% of the ball mill system, and can be laid in the open air, thus reducing the large amount of investment.
  2. High grinding efficiency: the roller on the disc to direct rolling ground material grinding, low energy consumption, and milling system compared to save energy consumption by 30% ~ 40%. Wear less, because of the work roll grinding is not and direct contact with the disk, and the grinding roller and the lining board is made of high quality materials. Therefore, the use of long service life, less wear and tear. Due to the hot air in the mill directly in contact with the material, drying ability strong, vertical mill system saves a dryer, both to save covers an area of, and save energy and by adjusting the temperature of hot air, can easily deal with different humidity material.
  3. Material in the mill short residence time, easy detection and control of product particle size and chemical composition, reduce the duplication of milling, the quality of the products is more stable. Roller sets and lining board is not direct contact, the product has very little iron content, and the mechanical wear and tear iron is easy to remove, for grinding white or transparent material, the product's whiteness and purity is high. Arranged for preventing the roller and the grinding disc lining board in direct contact with the limit device, to avoid the damage of shock and vibration, so on the product quality and stability to significant role in the guarantee.
  4. Operation and maintenance is more simple: equipped with automatic control system, can achieve remote control, easy to operate. Through the maintenance of oil cylinder, flip the boom, the replacement of the roller sleeve, lining board is convenient, reduce downtime losses.
  5. Five, energy saving and environmental protection without pollution: equipment vibration is small, low noise. The equipment is sealed, the system is working under negative pressure, no dust spillover, environmental cleaning, meet the national environmental protection requirements.

Technical Data

LM Vertical Grinding Mill
Model LM
130K
LM
150K
LM
170K
LM
190K
LM
220K
LM
130M
LM
150M
LM
170M
LM
190M
LM
220M
LM
130N
LM
150N
LM
170N
LM
190N
LM
220N
Wheel diameter(mm) 1300 1500 1700 1900 2200 1300 1500 1700 1900 2200 1300 1500 1700 1900 2200
Output (th) 10-30 13-40 18-57 23-72 36-110 10-15 16-22 20-28 26-35 35-50 5-14 7-20 8-27 9-30 18-55
Finish fineness µm 170-45 170-45 170-45 170-45 170-45   170-45 170-45 170-45 170-45 170-45
Mesh 80-325 80-325 80-325 80-325 80-325   80-325 80-325 80-325 80-325 80-325
Coal powder fineness (R0.08) 5-20% 5-20% 5-20% 5-20% 5-20%  
Coal powder moisture (%) <1% <1% <1% <1% <1%
End product moisture (%) ≤1% ≤1% ≤1% ≤1% ≤1% ≤1% ≤1% ≤1% ≤% ≤1%
Grinding material particle size D80 (mm) <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10
Grinding material max feed size(mm) <38 <40 <42 <45 <50 <38 <40 <42 <45 <50 <38 <40 <42 <45 <50
Moisture of grinding material not to dry (%) <4% <4% <4% <4% <4% <4% <4% <4% <4% <4%
Matieral moisture of into mill (%) <15% <15% <15% <15% <15%
Moisture of grinding material need to dry (%) 4%-15% 4%-15% 4%-15% 4%-15% 4%-15% 4%-15% 4%-15% 4%-15% 4%-15% 4%-15%
Into mill air temperature (℃) <350 <350 <350 <350 <350 <350 <350 <350 <350 <350 <350 <350 <350 <350 <350
Out of the mill air temperature (℃) 70-95 70-95 70-95 70-95 70-95 75-95 75-95 75-95 75-95 75-95 70-95 70-95 70-95 70-95 70-95
Raw coal hardgrove grindability index (HGI) >55 >55 >55 >55 >55
Main motor power (kw) 200 280 400 500 800 185 250 315 400 500 200 280 400 500 800
Contour dimension Length (mm) 5520 6550 7170 7580 8080 5520 6550 7170 7580 8080 5520 6550 7170 7580 8080
Width (mm) 2500 3070 3460 3320 4660 2500 3070 3460 3320 6700 2500 3070 3460 3320 4660
Height (mm) 7060 7560 8300 8960 9020 7060 7560 8300 8960 9020 7060 7560 8300 8960 9020