Vertical roller mill

Vertical roller mills are widely used in the concrete and mining fields, and are also used to process coal,lime and gypsum. These units can process both raw and recycled materials, while helping to reduce waste and preserve virgin supplies of these materials.
Capacity: 50-250 t/h
Motor Power: 1000-5000kw
Fineness: 3300-4000cm²/g

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  • High grinding efficiency and lower energy consumption
  • Lower metal consumption per unit of product
  • Grinding on the material layer bed, minimal sound emission
  • Operation under negative pressure and minimal dust pollution
  • Simple process flow with the combination of grinding, drying and classifying in a single unit
  • Less land occupation, tight layout, light weight, lower civil works cost

Product Introduction

The vertical roller mill has been widely used and promoted in the electric power, metallurgy, chemical industry,

non-metal industry because the overall efficiency attributed to energy-saving and low consumption is becoming

more and more evident in the cement industry.

GRM series vertical roller mill is developed with the features of high efficiency, energy-saving and environmental

protection which is achieved after exchanging ideas with senior experts from home and abroad and making

improvements based on same sector experience in the past years.

GRMC series typically designed to process materials in medium hardness, like soft coal or bituminous coal.

GRMK series is mainly used to grind cement clinker into fine powder during cement production,This cement mill widely used in the grinding of raw cement, slag, cement clinker, raw coal and other raw materials.

GRMS series GGBS vertical roller mill is the equipment to grind Ground Granulated Blast furnace Slag (GGBS),Nickel Slag, Manganese slag and other ore slag into small particles.


Applied material:

Barite, calcite, feldspar, talc, marble, limestone, dolomite, fluorite,ect.

limestone.jpg Gypsum stone.jpg dry mortor.jpg coal fluorite.jpg rock.jpg slag.jpg talc.jpg

GGBS production line, coal powder production line and other processing industry related to metal and non-metal mine. grinding raw meal, clinker, Ground Granulated Blast Furnace Slag, iron ore, limestone, coal powder, coke powder, coal gangue, fly ash, volcanic ash, gypsum, calcite, pyrophyllite, quartz, clay, sandstone, bauxite and other processing industry related to metal and non-metal mine.


Structure of vertical Roller mill:

1) The combined classifier improves the powder selection efficiency.

2) It is not necessary to distribute material on the grinding plate before start-up. The roller can be lifted up and down automatically and start without load.

3) It is well sealed by welded arc plate and structure is simple and reliable

4) With the help of roller turning device, it is easily to turn the roller out for maintenance.

5) Both sides of roller sleeve can be used so that the service life of refractory material is extended.

6) Grinding roller limit device can ensure a certain space between roller and grinding table, which avoids the direct friction and collision between roller and grinding table and enhances safety

7) The grinding roller is driven by spinning grinding table. Pressure filling and adjustment and roller lifting can be remotely controlled without operator on-site.

8) The roller bearing is circularly lubricated by thin oil to enable it to work under low temperature and clean grease so that the service life is extended

Working Principle of vertical roller mill:vertical roller mill work.jpg

Material through the feed tube fell on the center of grinding plate, centrifugal force generated from the rotation of grinding plate uniformly scatters and flattens the materials outwards the surrounding area of grinding plate, to forms a certain thick layer of materials bed, the material was crushed by number of rollers at the same time. Driven by the continuous centrifugal force to keep the materials moving to the outer edge of the grinding plate, the materials off the grinding plate rising with the hot air which enter from wind ring into the mill, through the mill shell into the middle of the separator, in this course materials and hot gas do a fully heat exchange, and the water quickly evaporates. Separator controls the output size of finished product, greater than the specified size are separated and fall back to the plate, while meet the fineness requirements are brought through the separator into the finished product warehouse.


 Specifications

 

Model Grinding Table Diameter (mm) Roller Diameter (mm) Roller Number (n) Motor (kW) Output (t/h)
GRMR22.30 2200 1400 3 550 70
GRMR26.30 2600 1600 3 790 100
GRMR28.30 2800 1750 3 900 115
GRMR30.30 3000 1700 3 1000 120
GRMR32.30 3200 1500 3 1400 160
GRMR34.30 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 mill is mainly used for grinding raw meal, clinker, Ground Granulated Blast Furnace Slag, iron ore, limestone, coal powder, coke powder, coal gangue, fly ash, volcanic ash, gypsum, calcite, pyrophyllite, quartz, clay, sandstone, bauxite an

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.

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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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