about Astra Co.

LM Vertical Mill


LM Vertical Mill,


Cement, coal, fly ash, putty powder, gypsum powder, limestone, kaolin


Cement, coal, power plant desulfurization, metallurgy, chemical industry, non-metallic mineral, construction material, ceramics.


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 different 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 equipped with one device,which prevents the roller from contacting with the liner directly, and avoids the destructive impact and severe vibration.


M Vertical Mill integrates crushing, drying, grinding, classifying and conveying together, and it is specialized in processing non-metallic minerals, pulverized coal and slag. Its coverage area is reduced by 50% compared with ball mill, and the energy consumption is saved by 30%-40% similarly.

Working Principle:

Vertical mill has two pairs of grinding rollers, each pair of roller composed of two narrow rollers, mounted on the same axis and can rotate at different speeds. There are two circular disc slot, and roller to the tire shape, work pressure in the tank. Disc roller and the relative sliding velocity between small and roller can swing, even if the roller sleeve and the disc after the liner wear can guarantee a good abrasive, will not affect the grinding effect. Roller symmetrical structure, one side can be upside down after use and wear. Material grinding process: hydraulic pneumatic roller device through the pressure applied to the material on the crushing of materials, the materials have been moved to crush the edge of disc, from the disc around the nozzle from the exhaust air to improve these materials to Separator.Meal to separate returns after a concentrated mill, fine powder was collected in the precipitator unloading. In the gas flow is small, the meal can not be increased to enhance air flow, they would fall through the nozzle discharged outside the mill, bucket elevator to be transported to the feeder of vertical mill and was re-grinding

Technical Parameters:

Series Ore Mill
Model LM130K LM150K LM170K LM190K LM220K LM240K LM280K LM340K LM370K
Disc Dia. (mm) 1300 1500 1700 1900 2200 2400 2800 3400 3700
Capacity (t/h) 10~30 13~40 18~57 23~72 36~114 41~128 50~196 70~260 90~320
Output fineness micron 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
Product moisture ≤1% ≤1% ≤1% ≤1% ≤1% ≤1% ≤1% ≤1% ≤1%
Max.input size (mm) <38 <40 <42 <45 <50 <55 <58 <62 <65
Best input moistrure <4% <4% <4% <4% <4% <4% <4% <4% <4%
input moistrure(drying required) 4~15% 4~15% 4~15% 4~15% 4~15% 4~15% 4~15% 4~15% 4~15%
Inlet air temperature (℃) <350 <350 <350 <350 <350 <350 <350 <350 <350
Outlet air temperature (℃) 70~95 70~95 70~95 70~95 70~95 70~95 70~95 70~95 70~95
Power (KW) 185~220 250~280 355~400 450~500 710~800 800~900 1120 1800 2240


Our company manufactured mobile crushing plant,stone jaw crusher, cone crusher, grinding mill,sand making machines vsi series and machines parts.

Our products are not only renowned in more than 20 provinces and cities in domestic markets, but also have being sold popularly in more than dozens of countries and areas all over the world like Eastern Europe, Middle East, Africa, South Asia, Southeast Asia, Oceania, and Central and South America etc..