LM Vertical Grinding Mills

SBM LM vertical grinding mills also named verical roller mill or coal mill.With a decade years research of mills,SBM LM vertical grinding mills is designed and manufactured based on our many years experience and world-advanced technology.LM vertical grinding mills is a kind of large scale powder mill which is designed specially to solve the problems of low capacity and high consumption of industry mills.LM vertical mill can simultaneously integrated with drying, milling, classifier and elevator.
Comparing with other common roller mills,the compact LM vertical grinding mills has the space-saving design,reducing the civil construction costs.The mill adopts reliable structure and reasonable process flow.It has the high grinding efficiency,meaning a 50% reduction in per-unit power consumption over ball mills.It is welcomed by the features of high-efficiency, energy-saving,minimal noise and vibration,low particle escape.

Application of LM Vertical Grinding Mills

LM series vertical grinding mills are widely used in grinding non-flammable and non-explosive materials under 9.3(the Moh's hardness), such as grinding quartz, feldspar, calcite, talcum, barite, fluorite, iron ore, copper ore quartz, slag, cement clinker, zircon sand, fly ash and carborundum, coal, etc.Now it has wide application in metallurgy, construction, chemical and mining industries, being the preferred equipments in grinding industry.

Distinctive feature of LM Vertical Grinding Mills

  1. High Drying Ability.By regulating the air temperature,it can meet requirements with diffirent humidity.
  2. High efficiency.It saves energy consumption by 30% ~ 40%,compared with ball mill.
  3. Less wear and tear.As the roller is not in direct contact with the disc.
  4. Environmental protection.It is with small vibration, low noise, and the overall sealing.
  5. A tractor serves several purposes.LM vertical grinding mills can crush, dry, grinding, classifying.
  6. Maintenance convenience and reduce the downtime loss.
  7. Easy to operate with the automatic control systems.
  8. Stable product quality.Easy to control the product particle size when it stage a shour time in mill.

Working principle of LM Vertical Grinding Mills

The motor of LM vertical grinding mills drives the grinding disc to rotate by the reducer.The air lock feeder from the feed inlet fall at the center of the grinding disk and hot air into the air from entering the mill.As the disc rotates,the material in the role of centrifugal force,move to the edge of the grinding disc,the disc of the annular groove by roller compaction and crushed,crushed material by wind ring high-speed airflow with in the edge of the grinding disc,large particles directly onto the disc regrinding.

Technical data of LM Vertical Grinding Mills

Model LM130K LM150K LM170K LM190K LM220K LM130M LM150M LM170M LM190M LM220M LM130N LM150N LM170N LM190N LM220N
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% ≤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