The PULVIS is a vertical, dry agitated media mill with an integrated dynamic classifier. Its strength is the ultrafine and low contamination grinding of hard materials.

Size reduction processes of products such as ceramic materials or glass are very energy-intense. The finer the particles to be produced, the higher the energy that is required for the grinding process. Therefore the PULVIS was developed to reduce energy consumption.

  • fineness values down to d97 < 1μm
  • steep particle size distributions
  • up to 80% energy saving

Principle of operation

The milling part is located at the bottom of the machine. Feed material is ground by agitated media that combine impact grinding and attrition.

The gasflow injected from the bottom side transports and cools the particles on their way through the grinding media.

Ground particles are conveyed by air, passing through the grinding chamber to the classifier.

The classifier separates the required fine product from coarse particles. The coarse particles return to the grinding zone for further grinding.


  • Compact design
  • From Laboratory to production scale: with possibility to scale-up over complete range
  • Energy efficient: With high grinding efficiency specific energy consumption is reduced by up to 80 %. Finer particle sizes are possible compared to jet milling.
  • Ultra fine particles: The compact unit reliably produces very fine products with particle sizes in the sub-micron range.
  • Easy assembly: disassembly and cleaning are achieved with this design. Ideal machine for frequent material changes.
  • Wear protection: Mill and classifier are protected by ceramic lining and parts.


The PULVIS is the right choice for the ultra-fine grinding of hard, temperature un-sensitive materials. In the grinding process also additives can be used. Typical application for the PULVIS are for example:

  • Aluminium oxide
  • Anorganic pigments
  • Battery materials
  • Ceramic materials
  • Ceramic pigments
  • Glass, glass frits
  • Hydrogen adsorbent alloy
  • Industrial materials
  • Metal oxide
Brochure PULVIS
Brochure Dry Ultrafine Grinding of Minerals

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