Vertical Raw Mill

Vertical raw mill is a type of industrial equipment used to crush or grind materials into small particles.Vertical roller mills are widely used in the concrete and mining fields, and are also used to process gypsum. These units can process both raw and recycled materials, while helping to reduce waste and preserve virgin supplies of these materials.

Application : Cement Plant, Clinker Grinding Unit, Thermal Power Plant
Capacity : 70-720 t/h
Motor Power : 800-2800 kW
Fineness : 80μmR 12-15%

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  • High-performance separator and optimised airflow ensure high separation efficiency and low pressure loss for energy saving.
  • Unusually large rollers permit coarse feed and ensure a thick grinding bed for maximum uptime.
  • Segmented wear parts for table and rollers allow use of the most wear-resistant materials and hardfacing for long life.
  • All impact forces and dynamic reactions are small and therefore easy to accommodate – preventsvertical mill stops.
  • Reversible roller segments ensure high material utilisation.
  • External circulation reduce power consumption of fan.
  • Feed sluice ensures air flow and steady feed flow for minimum power consumption and optimum mill production.
  • The raw mill is easily adaptable to grind wet materials.

Applied material:

fly-ash,slag, limestone, gypsum,ect.

  Gypsum stone.jpg  limestone.jpg  slag.jpg  fly ash.jpg


Vertical Roller Mill Production Line mainly consists of the grinder, dust collector, hot air stove, bucket elevator, feeder, hopper etc.

When it works, raw materials are fed in evenly by the feeder at the bottom of the hopper, then lifted to appropriate height by the bucket elevator, then sent into the mill through feeding pipe to be grinded , the grinded materials are brought into the powder classifier by the hot air generated by the hot air stove, at the same time, the materials are dried and classified , the unqualified materials fall down to be regrind, qualified fine powders are sent into powder collector , and then transported to the storage by the conveyor.



Model Grinding Table Diameter (mm) Roller Diameter (mm) Roller Number (n) Motor (kW) Output (t/h)
GRMR22.31 2200 1400 3 550 70
GRMR26.31 2600 1600 3 790 100
GRMR28.31 2800 1750 3 900 115
GRMR30.31 3000 1700 3 1000 120
GRMR32.31 3200 1500 3 1400 160
GRMR34.31 3400 1500 3 1600 180
GRMR36.41 3600 1600 4 1800 200
GRMR38.41 3800 1700 4 1900 230
GRMR40.41 4000 1800 4 2240 260
GRMR43.41 4300 1900 4 2500 310
GRMR46.41 4600 2060 4 3150 350
GRMR48.41 4800 2240 4 3350 390
GRMR50.41 5000 2360 4 3500 420
GRMR53.41 5300 2500 4 3800 470
GRMR56.41 5600 2600 4 4500 540
GRMR59.61 5900 2600 6 5000 610
GRMR63.61 6300 2700 6 6000 720

Note: mill spectral pattern benchmark

  1. Material medium friction (MF)=0.9~1.0;
  2. Material moisture max 7%;
  3. Refined powder granularity 80μmR 12~15%;
  4. Refined powder moisture 0.5~1.0%;
  5. The concrete mill installed power and technology parameter will be adjusted appropritely basing on the actual material property and requirements of owner;
  6. The above specification also applies to limestone powder mill, and the concrete type selection shall be decided according to material property.

Vertical roller mills are widely used in the concrete and mining fields,for example, Cement Plant, Clinker Grinding Unit, Thermal Power Plant.

Pre-sales Service:

The wide product range enables us to provide our customers with stand-alone machines or complete processing plants. Based on our customers’ request and budget, our experts make efficient, reliable solutions. Following customers’ order we produce strictly, what’s more, before placing the order every customer has the chance to visit XinXiang Great Wall (Chaeng) working machines or complete plant in the site.

To ease the trip for every visitor to China, in particular the first-time visitor, we provide FOR FREE all relevant visitor-friendly services including invitation letter preparation, hotel reservation, airport pick-up, incity transportation, and sightseeing guide, etc.


After-sales Service:

Experienced technicians guidance is available on the phone, and on the internet. One or more engineers will be dispatched to the quarry site to help install the customers’ plants. Necessary training about machine daily maintenance to local workers is provided also.

After-Sales department is made of well-trained employees and installation engineers, the installation engineers are special and professional members of XinXiang Great Wall (Chaeng), they are now strategically located home and abroad, working for our customers.


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