lm vertical grinding mill

LM Vertical Grinding Mills

The invention is a vertical milling machine grinding grain stone rural Nianzishan inspired by. Modern vertical milling machine is developed from l906 onwards, it has been continually improved over the past century, experienced a roller by centrifugal force to put pressure on the spring-loaded, and now pressurized hydraulic pneumatic spring system. Is the softest material from the grinding of coal to medium hardness and brittle cement raw materials to cement clinker and slag. For the cement industry, the NSP technology invention calciner, rotary kiln production doubled and large, making vertical milling machine structure has been constantly improved and large, to meet the requirements of a kiln with grinding.

LM vertical grinding mill is the world expert on the basis of long-term state company's mill development experience, according to the United States, Germany, Japan and other experts for the Chinese mill use of user requirements and recommendations, based on the original high pressure hanging roller mill on After painstaking research to design a new type milling machine.

LM series vertical milling machine mainly separator, roller device, disc device, the pressure part of the device, reducer, motor, housing and so on. LM series vertical milling machine with low investment costs, low operating costs, high drying capacity, easy to operate, reliable operation, easy maintenance, environmental protection, etc., are widely used in power generation, cement, metallurgy, chemical industry, non-metallic mineral industries , is a set of crushing, drying, grinding, milling industry, the ideal equipment for grading conveyor in one.

LM Vertical Grinding Mill Main features

  • 1. Low investment costs: As set crushing, drying, grinding, grading conveyor in one, the system is simple, compact layout, covering about 50% of the milling system, and can open layout, so they can significantly reduce investment costs.
  • 2. Low operating costs: First, the high milling efficiency: roller compacted ground directly on the disc material, low energy consumption, save energy and milling system compared to 30% to 40%. Secondly, less wear and tear: As the roller is not working in direct contact with the disc, and the grinding roller and liner made of high quality materials, so long life, less wear and tear.
  • lm vertical grinding mills
  • 3. for grinding materials adaptable, can be used for grinding all kinds of raw materials and fuels, such as limestone, sandstone (Si02> 90%), coal, cement clinker, blast furnace slag. Whether its grindability, abrasive much difference, through internal restructuring and rational mill operation, can produce different fineness, different than the surface area of qualified products.
  • 4. simple and reliable operation: equipped with automatic control system, which enables remote control, easy to operate. Equipped with a device to prevent the roller sleeve and disc liner direct contact, avoiding destructive impact and severe vibration.
  • 5. high efficiency drying, hot air from the annular slit spray people, wind speed is high, the mill ventilation cross-section of large and small resistance, the use of exhaust gas can be drying kiln preheater 8% moisture content material, if drying stove to bake drying aqueous 15% to 20% of the material.
  • 6. Product quality: because the material in the mill residence time is short, easy to detect and control the product particle size and chemical composition, to reduce duplication of milling, stable product quality.
  • 7. Easy maintenance: By overhaul cylinders, turn rotating arm, replace the roller sleeve, convenient liner, reducing downtime.
  • 8. the product quality control fast, flexible adjustment of product, ease of operation to achieve intelligent automation.

LM Vertical Grinding Mills Related Knowledge

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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

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