Hammer Mills

The Hammer Mills HM 341 and HM 671 in a robust industrial design are used for crushing soft to hard, tough or damp materials by the principle of physical impact. The rotating hammers are beating the material into the grinding chamber. At the required fineness, the material is leaving the grinding chamber through the screen insert. The oscillation hammers work as overload protection in case of big and very hard lumps.

Depending on product characteristics and the desired milling result, hammer mills can be equipped with a variety of screen inserts. Replacement requires no special tools and can be done by the operator.

The Hammer Mills can be equipped with a variety of material feeding and discharging equipment.

Design Sizes of the Hammer Mills

Design size

HM 341

HM 671

Motor

max. 18,5 kW (24 PS)

max. 45 kW (60 PS)

Inlet width

340 mm (13 ")

670 mm (26")

Weight

approx. 460 kg
(1014 lb)

approx. 650 kg
(1433 lb)

Application of Hammer Mills

  • Crushing as preparation for fine milling

  • Crushing of soft to hard, tough or damp materials

  • Sample preparation for research institutions


Example: Crushing of Rock Salt

This hammer mill is used for crushing rock salt in underground mining. The hammer mill is integrated in the on-site production line. The hammer mill is made of stainless steel to avoid corrosion.

  • Design size: HM 671

  • Motor: 30 kW

  • Operation with frequency inverter at 25-87 Hz

  • Input material: rock salt

  • Made of stainless steel

  • Hammer Mill in Stainless Steel
  • Inlet of Hammer Mill

Example: Sample Preparation

This hammer mill is used for preparation of different damp and lumped samples for a following analysis. A manually operated infeed flap enables the secure and batch-wise feeding of the sample material. The grinding stock is collected in exchangeable containers.

To avoid dust formation, an additional aspiration may be applied.

  • Design size: HM 341

  • Motor: 7,5 kW

  • Operation with frequency inverter at 30-60 Hz

  • Input material: lumps up to 150 mm (6")

  • Final grain size: 0...3 mm (0 to 0.1")

  • Manually operated infeed flap

  • Two exchangeable containers with roll car, each 70 l (18.5 gal)

  • Hammer Mill

Example: Molding Sand Preparation

This hammer mill is used for crushing molding sand after the sand-casting process. The molding sand may be re-used for further castings. The hammer mill is integrated in the on-site production line.

  • Design size: HM 671

  • Motor: 15 kW

  • Operation with frequency inverter at 20-60 Hz

  • Input material: molding sand

  • Hammer Mill

Example: Crushing of Ceramic

This hammer mill is used for preparation of damp and lumped ceramic samples for following analysis. A manually operated infeed flap enables the safe and batch-wise feeding of the sample material. The grinding stock is collected in exchangeable containers.

Easy changeable screen inserts enables the adjustment of the mill to the particular crushing task.

  • Design size: HM 341

  • Motor: 7,5 kW

  • Input material: burnt ceramic; approx. 250x140x70 mm (10x5.5x2.8")

  • Capacity: approx. 1 t/h

  • Final grain size: ca. 95% < 4 mm (0.15")

  • Manually operated infeed flap

  • Two exchangeable containers with roll car, each 70 l (18.5 gal)

  • Dust aspiration

  • Hammer Mill

Example: Pre-Crushing

This hammer mill is used for shredding reindeer antlers as preparation for fine grinding with a REKORD C turbo mill. A manually operated feeder is used for feeding of the antlers pieces. The grinding stock is conveyed pneumatically to the mill REKORD C afterwards.

  • Design size: HM 671

  • Motor: 11 kW

  • Input material: reindeer antlers, sawn to 300 mm (12")

  • Final grain size: 0...10 mm (0 to 0.4")

  • Manually operated infeed flap

  • Reindeer Antlers Grinding Plant
  • Reindeer Antlers before Hammer Mill
  • Grinded Reindeer Antlers after Hammer Mill
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Data Sheet

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Contact

Tel.: +49 35242 432-30

E-Mail: info@jehmlich.info