Close-up of HK hammers and screen with very fine mesh

Fine Grinder HK: Efficient grinding with less dust

The ANDRITZ Fine Grinder HK is perfectly suited for fine grinding of challenging materials to a fraction size of 8 to 0 mm (powder).

The Fine Grinder HK is used for efficient fine grinding of pre-shredded input material down to a very accurate granulate size and even finest powder, while keeping dust to an absolute minimum. The HK is adept at grinding hard-to-handle materials such as paper, cardboard, or wood (either clean or residual). The Fine Grinder is often combined with a Universal Shredder FRP to pre-shred the input material and remove large contaminants before further processing.

Fine Grinder HK: efficient grinding with less dust

The input material with a particle size of 10-30 mm is usually fed into the machine with a screw or band conveyor. In order to prevent harmful contaminants from entering the machine, non-ferrous fractions are normally separated by a pneumatic system (stone trap) and ferrous materials are removed by a magnet.

Integrated fan to reduce the amount of dust

The cutting unit consists of hammers that are mounted on the rotor. Once the material is ground to the proper size, airflow from an integrated fan pushes the ground material through a screen with very fine mesh. This minimizes the amount of dust generated and maximizes the throughput efficiency of the Fine Grinder. The HK is capable of producing a fraction with very high quality and accurate granulate size, which ranges from 8 mm down to finest powder.



  • Dry wood (moisture content < 20%)
  • Paper
  • Cardboard

Swing door design for easy access and maintenance

The Fine Grinder HK is designed with ease of maintenance in mind.  A large swing door provides easy access to the cutting unit so that wear parts can be mounted or dismounted quickly. No tools are required to open the swing door clamps.

A special design feature of the HK is the integrated fan that performs two functions: assistance with the fine grinding and with transport of the material. An extra fan is not required.

Fine Grinder HK with swing door for easy maintenance

Main advantages of the Fine Grinder HK

  • Small and very accurate granulate size
  • Integrated fan to reduce the amount of dust
  • Easy combination with magnet and stone trap
  • Service door for fast and easy access to the cutting unit

Universal Shredder FRP

The powerful single-shaft shredder FRP enables one-step processing to obtain particle sizes down to 10mm.

Read more

Wood waste recycling

Find out how to process wood waste with ANDRITZ shredding technology!

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  • ANDRITZ Fine Grinder HK PDF : 609 KB
  • ANDRITZ Universal Shredder FRP PDF : 669 KB
  • ANDRITZ Recycling PDF : 2.2 MB