Rotor impact mill (RPM)

The sand maker

Layout of the rotor impact mill (RPM)
Layout of the rotor impact mill (RPM)

The BHS rotor impact mill (type RPM) is a high-performance crusher with a vertical shaft. The rotor is circular with horseshoe-shaped impellers. This unique impeller rotor, combined with the anvil ring, achieves a very large targeted crushing ratio and an excellent grain shape. This mill can crush all moderately abrasive minerals with maximum feed grain sizes of up to 56 mm.

An intense impact and shearing effect is achieved between the horseshoe-shaped hammers and the anvil ring. You can fine-tune this machine to your requirements by adjusting the rotor speed and the annular gap.

Operating principle (overhead view) of the rotor impact mill
Operating principle (overhead view) of the rotor impact mill

Several different sizes are available to ensure that customer-specific requirements are optimally met. The mill is primarily used for producing high-quality sand with excellent grain shape (e.g., for the dry mortar industry).

At our BHS technical center in Sonthofen, we can perform industrial crush tests on customer-specific materials in order to find solutions to even the most challenging problems.

Two RPM 1513 rotor impact mills used for producing dry mortar sand from limestone
Two RPM 1513 rotor impact mills used for producing dry mortar sand from limestone
Use of an RPM 1113 rotor impact mill for production of high-grade crushed sand made from andesite grit
Use of an RPM 1113 rotor impact mill for production of high-grade crushed sand made from andesite grit
Online contact request
Verify your details
Verify your details

Downloads

Brochure "Rotor impact mill" (PDF / 1.6 MB)
Brochure "Rotor impact mill"

Product brochure "Rotor impact mill" (RPM)"

Size: 1.6 MB
Download
TDS "Rotor impact mill" (PDF / 466 KB)
TDS "Rotor impact mill"

Technical data sheet "Rotor impact mill (RPM)"

Size: 466 KB
Download

Advantages

  • Unique operating principle
  • High crushing ratio
  • Selective crushing effect
  • Easy maintenance

Applications

BHS crushing technical center

Link to tests at BHS technical center

Technical article

Brought into line - Rotor crushers for the production of sand and fine sand

11-2009
November 2009
PDF (641 KB)
Brought into line - Rotor crushers for the production of sand and fine sand

For the production of sands for the construction materials industry BHS Sonthofen has developed special rotor crushers, which depending on crushing requirements and the application range of the sand product can process soft, medium-hard to hard and wear-intensive rock. At the company's test centre original machines are available for conducting test series. The following paper describes the principle of operation of BHS rotor crushers and presents different examples of crusher performance with reference to screening curves.

Size: 641 KB
Download

Impact Stresses for Selective Comminution - For processing slag, incineration ash and dross

5/2009
May 2009
PDF (2.3 MB)
Impact Stresses for Selective Comminution - For processing slag, incineration ash and dross

Metal-containing waste, e.g. slag, incineration ash and dross, are formed during the production of metals and are to be recycled as waste-derived materials. To obtain an optimal and marketable separated product from the processing of these material groups, the process parameters must be individually adjusted depending on the required final product, but series of tests conducted at the BHS test centre have shown that the above-mentioned wastederived materials can be processed in the same machine systems despite different their material properties.

Size: 2.3 MB
Download

Manufacturing of dry mortar sands

No. 9-2007 (Volume 60)
September 2007
PDF (327 KB)
Manufacturing of dry mortar sands

The preferred machines for the manufacturing of dry mortar sands are impact mills with a horizontal shaft, hammer mills and rotor impact mills with a vertical shaft. Impact mills can comminute feed material sized up to 120 mm and are therefore suitable for use as a primary crusher. However, they cannot process oversize particles up to 4 mm. Hammer mills with a bar grid produce a significantly higher portion of undersize material up to 0.1 mm (socalled ⌠filler) and should therefore only be used in applications where this is explicitly desired. Rotor impact mills can be used both as primary crushers for feed materials sized up to 56 mm and as secondary crushers for off-spec particle sizes up to4 mm.

Size: 327 KB
Download