DE  |  EN  |  FR  |  ES

MPS vertical roller mill

The versatile MPS vertical mill – with a fine tradition of quality grinding

Highest flexibility with constant product quality, individually conceived, suitable for a variety of applications, undergoing constant development: with a number of more than 2800 mills sold, the MPS vertical mill is our proven allrounder. It can be used for the grinding of coal, petcoke, clay, limestone, quicklime and many other materials no matter how different their grindability and abrasiveness may be or whatever fineness or drying degree is required. The MPS mill also grinds, dries, calcines, and classifies gypsum without any problem, all in a single machine, for any fineness requested and considering individual requirements. The MPS vertical roller mill - built to last, reliable and energy-efficient - is the optimum solution when it comes to performing several process steps in one unit.

Advantages of the MPS vertical mill

Low capital expenditure

MPS mills need only few peripheral machinery, no or little walled-in space, their operation is dust-free and they have a low noise level.

Low electric energy consumption

The grinding principle and the high efficiency classifier ensure the reduction of electric energy consumption by up to 40% as compared with conventional ball mills.

Optimum utilization of process heat

The thermal energy of process gases – even at low temperature - can be used on MPS mills.

High availability

Thanks to low specific wear rates, high-quality wear materials and sophisticated service concepts, maintenance times of the MPS mill are reduced.

Favorable control behavior

High drying capacity, short dwell time of the material to be ground, and remote control of grinding pressure and classifier rotor speed ensure a fully automatic operation of the MPS mill even with varying raw material characteristics.

Design principle and technical data

Select application envisaged

F
M
H
1
2
4
3
5
6
7
F Fines
M Material to be ground
H Hot gases
1 SLS high efficiency classifier for sharp separation
2 Closed mill housing pressure-shock proof up to 3.5 bar
3 Optimized free flow areas
4 Maintenance door with Lift-and-Swing System
5 Design measures preventing pulverized coal deposits
6 Rollers can be lifted off
7 Pull rods outside mill housing

Working principle

Three stationary grinding rollers roll on a rotating grinding table. The material is drawn in between the rollers and grinding table and ground by pressure and shear. The required pressure forces are produced by a hydropneumatic tension system. After being rolled over by the rollers, the material is conveyed to a stationary nozzle ring due to the rotation of the grinding table. Gases (air or hot gas) flow through this nozzle ring, take up the ground and dried material and convey it to the classifier where it is separated by the rotating wheel (rotor) into grits and fines. The grits fall back into the grinding zone whereas the fines leave the classifier with the gas flow for being separated in cyclones or a filter.

Technical data
Throughput rate up to 110 t/h
Mill drive up to 2,000 kW
Number of grinding rollers 3
Feed size up to 100 mm
Feed moisture up to 35% (surface moisture)
Target fineness degrees 60 - 100 µm
Classifier high efficiency classifier
Grinding table diameter up to 4,500 mm
Pressure-shock proof up to 3.5 bar
Feed material coal, petcoke
F
M
H
1
2
3
4
5
6
7
8
F Fines
M Material to be ground
H Hot gases
1 SLS high efficiency classifier for sharp separation
2 Closed mill housing
3 Optimized free flow areas
4 Maintenance door with Lift-and-Swing System
5 Rollers can be lifted off
6 Pull rods outside mill housing
7 Nozzle ring centering in case of grinding-calcining
8 Insulation of hot gas area in case of grinding-calcining

Working principle

Three stationary grinding rollers roll on a rotating grinding table. The material is drawn in between the rollers and grinding table and ground by pressure and shear. The required pressure forces are produced by a hydropneumatic tension system. After being rolled over by the rollers, the material is conveyed to a stationary nozzle ring due to the rotation of the grinding table. Gases (air or hot gas) flow through this nozzle ring, take up the ground and dried material and convey it to the classifier where it is separated by the rotating wheel (rotor) into grits and fines. The grits fall back into the grinding zone whereas the fines leave the classifier with the gas flow for being separated in cyclones or a filter.

Technical Data
Throughput rate up to 150 t/h
Number of grinding rollers 3
Feed size up to 60 mm
Feed moisture pit moisture
Target fineness degrees 60 - 500 µm
Classifier high efficiency classifier
Feed material natural gypsum, mixtures of natural gypsum and FGD gypsum
F
M
H
1
2
3
4
5
6
7
F Fines
M Material to be ground
H Hot gases
1 SLS high efficiency classifier for sharp separation
2 Closed mill housing
3 Optimized free flow areas
4 Discharge of adverse ingredients as an option
5 Maintenance door with Lift-and-Swing System
6 Rollers can be lifted off
7 Pull rods outside mill housing

Working principle

Three stationary grinding rollers roll on a rotating grinding table. The material is drawn in between the rollers and grinding table and ground by pressure and shear. The required pressure forces are produced by a hydropneumatic tension system. After being rolled over by the rollers, the material is conveyed to a stationary nozzle ring due to the rotation of the grinding table. Gases (air or hot gas) flow through this nozzle ring, take up the ground and dried material and convey it to the classifier where it is separated by the rotating wheel (rotor) into grits and fines. The grits fall back into the grinding zone whereas the fines leave the classifier with the gas flow for being separated in cyclones or a filter.

Technical data
Throughput rate up to 200 t/h
Number of grinding rollers 3
Feed size up to 60 mm
Feed moisture pit moisture
Target fineness degrees 20 - 500 µm
Finished product moisture < 1% H2O
Classifier high efficiency classifier
Feed material clay, bentonite
Optional discharge of adverse ingredients (e.g. pyrite)
F
M
H
1
2
3
4
5
6
7
F Fines
M Material to be ground
H Hot gases
1 SLS high efficiency classifier for sharp separation
2 Closed mill housing
3 Optimized free flow areas
4 Discharge of adverse ingredients as an option
5 Maintenance door with Lift-and-Swing System
6 Rollers can be lifted off
7 Pull rods outside mill housing

Working principle

Three stationary grinding rollers roll on a rotating grinding table. The material is drawn in between the rollers and grinding table and ground by pressure and shear. The required pressure forces are produced by a hydropneumatic tension system. After being rolled over by the rollers, the material is conveyed to a stationary nozzle ring due to the rotation of the grinding table. Gases (air or hot gas) flow through this nozzle ring, take up the ground and dried material and convey it to the classifier where it is separated by the rotating wheel (rotor) into grits and fines. The grits fall back into the grinding zone whereas the fines leave the classifier with the gas flow for being separated in cyclones or a filter.

Technical data
Throughput rate up to 200 t/h
Mill drive up to 2,000 kW
Number of grinding rollers 3
Feed size up to 100 mm
Feed moisture up to 10%
Target fineness degree of fine material up to 30 µm
Target fineness degree of discharged coarse material up to 2 mm
Classifier high efficiency classifier
Grinding table diameter up to 4,500 mm
Feed material limestone
With or without coarse material discharge
F
M
H
1
2
3
4
5
6
F Fines
M Material to be ground
H Hot gases
1 SLS high efficiency classifier for sharp separation
2 Closed mill housing
3 Optimized free flow areas
4 Maintenance door with Lift-and-Swing System
5 Rollers can be lifted off
6 Pull rods outside mill housing

Working principle

Three stationary grinding rollers roll on a rotating grinding table. The material is drawn in between the rollers and grinding table and ground by pressure and shear. The required pressure forces are produced by a hydropneumatic tension system. After being rolled over by the rollers, the material is conveyed to a stationary nozzle ring due to the rotation of the grinding table. Gases (air or hot gas) flow through this nozzle ring, take up the ground and dried material and convey it to the classifier where it is separated by the rotating wheel (rotor) into grits and fines. The grits fall back into the grinding zone whereas the fines leave the classifier with the gas flow for being separated in cyclones or a filter.

Technical data
Throughput rate up to 80 t/h
Mill drive up to 600 kW
Number of grinding rollers 3
Feed size up to 60 mm
Target fineness up to 20 µm
Classifier high efficiency classifier
Feed material quicklime
F
M
H
1
2
3
4
5
6
F Fines
M Material to be ground
H Hot gases
1 SLS high efficiency classifier for sharp separation
2 Closed mill housing
3 Optimized free flow areas
4 Maintenance door with Lift-and-Swing System
5 Rollers can be lifted off
6 Pull rods outside mill housing

Working principle

Three stationary grinding rollers roll on a rotating grinding table. The material is drawn in between the rollers and grinding table and ground by pressure and shear. The required pressure forces are produced by a hydropneumatic tension system. After being rolled over by the rollers, the material is conveyed to a stationary nozzle ring due to the rotation of the grinding table. Gases (air or hot gas) flow through this nozzle ring, take up the ground and dried material and convey it to the classifier where it is separated by the rotating wheel (rotor) into grits and fines. The grits fall back into the grinding zone whereas the fines leave the classifier with the gas flow for being separated in cyclones or a filter.

Technical data
Throughput rate up to 200 t/h
Mill drive up to 2,000 kW
Number of grinding rollers 3
Feed size up to 100 mm
Feed moisture up to 10%
Target fineness degrees 30 µm
Classifier high efficiency classifier
Grinding table diameter up to 4,500 mm
Feed material kaolin, talc, pozzolana and many more

Maintenance

Wear protection/maintenance

Depending on the abrasiveness of the material to be ground and areas to be protected, different wear materials are used on our vertical roller mills. The grinding elements are primarily made of alloy cast iron as per DIN 1695, hardfaced cast iron or composite materials with high-chromium inserts in ductile base materials. The housings and other mill components are protected against jet wear with highly wear-resistant steel plates or hardfaced composite plates. Components which are specifically exposed to wear like gas outlet ducts have additional ceramic liners. All this is for optimum protection and short maintenance shutdown.

Swing-out system of rollers on MPS mills

The highest wear occurs on the wear parts of the grinding elements as is the case with any type of vertical mill. Therefore, ease of replacement and regeneration is a major feature of the mill. With our proven Lift-and-Swing System, wear parts can be replaced rapidly through one single maintenance door. The grinding rollers and grinding table segments are driven to the maintenance door with the maintenance drive and are swung out of the grinding area. As a result maintenance downtime is reduced and work is easy and safe.

Our MPS vertical mills