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MRD / MRE ball mill

Individual ball mills – proven since 1864

Hundreds of ball mills - made by Pfeiffer to suit the customers’ particular requirements - operating all over the world. In fact we design, build and install ball mills which are specially adapted to grind hard and even extremely abrasive materials.

Advantages of the ball mill

Adjustable grain size distribution

When operating on the open circuit principle, the product fineness and grain size distribution are adjusted via the peripheral material discharge. In case of circuit grinding, these parameters are set with the high efficiency separator.

Highest availability

Simple and rigid design, wear resistant lining, minor maintenance requirement.

Design principle and technical data

Select application envisaged

Feed material
F
D
F
G
1
2
F feed material
D dedusting
G ground product
1 grinding balls
2 adjustable discharge slots

Working principle

Fed into the mill through one or both bearing trunnions, the material is ground by impact and friction from the balls. The ground product is discharged from the mill through discharge slots provided in the mill tube, through a discharge wall or through the end trunnion. The design and setting of the discharge slots or discharge wall determine the grain size distribution of the ground product. When performing circuit grinding, the product fineness can be set at the separator. In case of coarse grinding where a downstream screening machine is provided, the product fineness can be preselected by providing a specific mesh width on the screening machine.

Technical data
Throughput rate up to 50 t/h
Feed size up to 10 mm
Feed moisture dry
Target fineness degrees 10 µm - 200 µm
Feed material lime hydrate
F
D
F
G
1
2
F feed material
D dedusting
G ground product
1 grinding balls
2 adjustable discharge slots

Working principle

Fed into the mill through one or both bearing trunnions, the material is ground by impact and friction from the balls. The ground product is discharged from the mill through discharge slots provided in the mill tube, through a discharge wall or through the end trunnion. The design and setting of the discharge slots or discharge wall determine the grain size distribution of the ground product. When performing circuit grinding, the product fineness can be set at the separator. In case of coarse grinding where a downstream screening machine is provided, the product fineness can be preselected by providing a specific mesh width on the screening machine.

Technical data
Throughput rate up to 50 t/h
Feed size up to 30 mm
Target fineness degrees 10 µm
Feed material quicklime
In closed circuit with high efficiency separator
F
D
F
G
1
2
F feed material
D dedusting
G ground product
1 Mahlkörper
2 adjustable discharge slots

Working principle

Fed into the mill through one or both bearing trunnions, the material is ground by impact and friction from the balls. The ground product is discharged from the mill through discharge slots provided in the mill tube, through a discharge wall or through the end trunnion. The design and setting of the discharge slots or discharge wall determine the grain size distribution of the ground product. When performing circuit grinding, the product fineness can be set at the separator. In case of coarse grinding where a downstream screening machine is provided, the product fineness can be preselected by providing a specific mesh width on the screening machine.

Technical data
Throughput rate up to 50 t/h
Feed size up to 10 mm
Feed moisture dry
Target fineness degrees 10 µm - 5 mm
Feed material kaolin, quartz, feldspar, (calcined) bauxite, sintered magnesite, corundum, fireclay, fired rejects, fritted glass, fritted enamel, silicon carbide, and many more
Either as open circuit mill or in closed circuit with high efficiency separator/distribution table separator and/or in circuit with a screening machine