Application

Vertical Roller Mill is mainly applied in the grinding process of metallurgy, building materials, chemical, mining and other mineral industries, and suitable for grinding quartz, feldspar, calcite, talcum, barite, fluorite, rare earth, marble, ceramic, bauxite, manganese ore, iron ore, copper ore, phosphate rock, red iron oxide, zircon sand, slag, cement clinker, activated carbon, dolomite, granite, garnet, iron oxide yellow, chemical fertilizer, compound fertilizer, fly ash, bituminous coal, coking coal, lignite, magnesite sand, chrome oxide green, gold, red mud, clay, kaolin, coke, coal gangue, porcelain clay, kyanite, fluorspar, bentonite, rhyolite, pyrophyllite, shale, purple stone, Diego rock, basalt, gypsum, graphite, silicon carbide, thermal insulation materials and other non-flammable burst materials whose Mohs hardness are below 9.3.

Features

1. Composite separator improves the efficiency of the powder.
2. With the function of automatic lifting and falling , can realize no-load starting.
3. Welded type arc plate is used for sealing, it features simple structure, reliable performance, well-sealed structure.
4. By means of the roller swing-out device, the grinding rollers can be turned out of the mill, which is in favor of maintenance.
5. The limit mechanism avoids the fiction and crash of metals between grinding roller and grinding plate, increasing the rotating stability and security.
6. Operating pressure of hydraulic system is low, can reduce the leakage failure and the mill vibration , is good for operation and management.
7. The centralized circulating oil lubrication is applied to the grinding roller bearings, which ensures the bearing operate at constant temperature and with pure oil, so that longer service life is achieved.

Working Principle

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.

Technical data

Main Specifications of GRMR Raw Materials Vertical Mill

Model	Diameter of Millstone (mm)	Mean Diameter of Grinding Roller (mm)	Grinding Roller No.	Standard Installed Power (kw)	Capacity (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
GRMR32.40	3200	1500	4	1400	160
GRMR34.40	3400	1500	4	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
GRMG59.61	5900	2600	6	5000	610
GRMR63.61	6300	2700	6	6000	720

Remarks :( Selection Standard of Mill)
1. The medium grindability of raw materials (MF) =0.9~1.0;
2. The maximum moisture content of raw materials 7%;
3. End Product Fineness 80μm R12~15%;
4. The moisture content of finished products: 0.5~1.0%;
5. The specific installed power and technology parameters can be properly adjusted according to the properties of actual materials and the requirements of business owner;
6. The above specifications are also suitable for the limestone grinding, and the specific model is determined by the materials features.

Main Specifications of GRMK Cement Vertical Roller Mill

Model	Diameter of Millstone (mm)	Medium Diameter  of Roller  (mm)	Roller Quantity	Standard Installed Power (kw)	Capacity  (t/h)
GRMK30.31	3000	1600	3	1250	55-60
GRMK32.31	3200	1700	3	1600	65-80
GRMK35.41	3500	1800	4	1800	85-100
GRMK40.41	4000	1900	4	2500	115-125
GRMK43.41	4300	2120	4	3000	135-145
GRMK46.41	4600	2240	4	3350	150-160
GRMK48.41	4800	2240	4	3550	170-180
GRMK50.41	5000	2360	4	3900	190-200
GRMK53.41	5300	2500	4	4600	210-250
GRMK56.61	5600	2500	6	5300	235-250

Remarks：(Mill Selection Standard)
1.Cement standard：PC42.5       Specific surface area：3300-3800cm2/g；
2. Confirm the compounding ingredient at the time of model selection；choose the lower limit if the raw material is hard to grind ；
3. Can choose two roller mode as per condition of user.