GGBS Vertical Roller Mill

Applied material:
Blast-Furnace Slag, building material, limestone,slag,rock, talc, etc.
       

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 Introduction of GGBS vertical roller mill
GGBS vertical roller mill is the equipment to grind Ground Granulated Blast furnace Slag (GGBS) into small particles.GGBS (fineness:4200-4500cm2/g) produced by vertical roller mills are being used to substitute clinker in conventional cement manufacturing as well as to partially replace OPC for ready-mixed concrete production, for which the percentage of GGBS usage is typically at 10-15% and 20-25% respectively.

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Features:
1. Good return on investment
The widely use of slag increases the market demand to slag gradually. In recent years, investment in slag production line has been a new favorite in investment market. One production line can recover the cost in 1-3 years.
2. Reducing the power consumption of slag micro powder preparation effectively.
According to the display of slag powder production measured data, traditional ball mill needs power consumption 75~80kWh for per ton slag micro powder. However, it needs power consumption 42~45 kWh for per ton slag micro powder if adopts advanced vertical roller mill technology, and it can be saving electricity 33~35kWh use of vertical roller mill production per ton slag, and power saving effect is very remarkable.
3. Reducing the environment pollution effectively in the process of slag powder preparation.
Slag powder vertical roller mill adopts the internal negative pressure system to reduce the dust spillover effectively. The equipment adopts advanced technology with low revolving speed, stable operation, low noise, and the noise does not exceed 85dB(A) from the mill 1 meter.
4. Removing iron effectively, increasing additional income.
The advanced technology of slag vertical roller mill can be removed the iron effectively from the slag, and no less than 1% iron content can not only protect the machine, but also can increase additional income.

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Investment income
According to association statistics, currently the world each year to produce slag the amount of over 90 million tons, steel slag utilization in 2013 less than 25% , over the past five years the cumulative amount of over 1.279 billion tons discard pile, and the number is increasing, steel companies to environmental management pose serious challenges.

Specifications

Model	Grinding Table Diameter (mm)	Roller Diameter (mm)	Roller Number (n)	Motor (kW)	Output (t/h)
GRMS26.21	2600	1600	2	1000	30
GRMS33.31	3300	1700	3	1600	50
GRMS35.31	3500	1800	3	1800	60
GRMS40.41	4000	1900	4	2240	70
GRMS43.41	4300	2120	4	2800	90
GRMS46.41	4600	2240	4	3150	105
GRMS48.41	4800	2240	4	3550	125
GRMS50.41	5000	2360	4	3800	140
GRMS53.41	5300	2500	4	4200	160
GRMS56.61	5600	2500	6	5000	180

Note: mill spectral pattern benchmark

1. Material medium friction (MFs)=0.9~1.0;
2. Material moisture max 15%;
3. Refined powder granularity 4200~4500 cm²/g;
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;

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Prodction line gallery:
 
    ggbs production line                                         GRMS vertical roller mill 
            stove system                                                              dust collector

         finished products warehouse                                          control system

Cement Vertical Roller Mill

Applied material:
Gypsum, slag, limestone, dolomite,rock,ect.

      

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working principle
This cement mill is widely used in the grinding of cement raw meal, slag(GGBS plant), cement clinker, raw coal and other raw materials. It gathers grinding, drying and powder selecting as a whole, with high grinding efficiency and high drying capacity ( the maximum handling material moisture is up to 20% ). The vertical mill adopts dynamic powder selecting device, which comes with high powder-selecting efficiency and convenient adjustment of fineness.After crushed by crusher, the large materials become small ones and are sent to storage hopper by elevator, and then evenly sent to the upper distribution plate of the turn plate by vibrating feeder and sloping feeding pipe.The grinding disc is driving by motor through reducer.
The material falls to grinding disc from the feed opening. The materials are driven to the edge of disc by the centrifugal force and crushed into fine powders by rollers. Then, the hot air from the nozzle take the fine powder to high effiency classsifer.
The qualified powder are taken by the air to the powder collector to be collected, while the unqualified powder are sent back for regrinding.

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Feature
1. Technique and technology is mature and stable
Great Wall Company's GRMK series Vertical cement  mill in the production of cement specific surface area up to 3800 cm²/ g with stable and reliable quality, it already have been the ability completely to replace tube mill.
2. Reducing the power consumption of cement clinker preparation effectively
According to the display of pulverized coal measured data, it can be saving electricity above 30% use of vertical roller mill production per ton cement clinker than traditional ball mill, and the power saving effect is very remarkable.

3. Stable, high-efficiency and environmental protection
There is a low vibration and noise in overall system, and equipment with whole sealing, system working under negative pressure with no dust overflow, clean environment. Therefore, cement vertical roller mill meets the national environmental protection requirements. With working mechanism changing, cement vertical roller mill can be reduced friction and improved service life.

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 Specifications

Model	Grinding Table Diameter (mm)	Roller Diameter (mm)	Roller Number (n)	Motor (kw)	Output (t/h)
GRMK30.31	3,000	1,600	3	1250	55~60
GRMK32.31	3,200	1,700	3	1600	65~80
GRMK35.41	3,500	1,800	4	1800	85~100
GRMK40.41	4,000	1,900	4	2500	115~125
GRMK43.41	4,300	2,120	4	3000	135~145
GRMK46.41	4,600	2,240	4	3350	150~160
GRMK48.41	4,800	2,240	4	3550	170~180
GRMK50.41	5,000	2,360	4	3900	190~200
GRMK53.41	5,300	2,500	4	4600	210~230
GRMK56.61	5,600	2,500	6	5300	235~250

Note: Mill spectral pattern benchmark

1. The cement standard: PC42.5 specific surface: 3300~3800cm² /g;
2. Confirm the compounding ingredient at the time of type selection; choose the lower limit when friction is not well;
3. Can choose 2 roll mode as per situation of the user.

Vertical roller mill

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.

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Applied material:
Barite, calcite, feldspar, talc, marble, limestone, dolomite, fluorite,ect.
      

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.

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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:

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.

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 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.