Skala Australasia Pty Ltd

Grinding Mills


General Kinematics Vibra-Drum® grinding mills are proven in dozens of milling applications in the mining and mineral industries.

GK Grinding mills are achieving impressive energy savings (35-50%), thanks to a unique rotational material motion that is more efficient than conventional ball or rotary grinding mills. New processes such as micron grinding and mechano chemical grinding give our customers a unique and effective competitive advantage.

VIBRA-DRUM grinding mill units are also ideal for continuous processing of "difficult-to-fluidize" products such as large flake and stringy or tacky materials. Typical VIBRA-DRUM grinding mill applications include direct gas contact heating, drying, cooling, and coating.

How it works

Exceptional grinding performance and energy savings are the result of the

Vibra-Drum's natural frequency design. A sub-resonant, two mass drive and spring system alternately stores and releases grinding power. Once in motion, energy is only needed to move the grinding media as a fluid mass, and to overcome frictional losses. The Vibra-Drum grinding mill can be used for processes other than grinding. It has been used to:

  • process and agglomerate fiberglass
  • mix product components
  • clean castings
  • for hydrometallurgy
  • minerals recovery and
  • other processes.

The increased number of impacts in the Vibra-Drum grinding mill results in a faster, more efficient grinding action. As the grinding mill vibrates, media particle migration is experienced in both axial and transverse directions. In fact, the media migrates through the Vibra-Drum grinding mill in a path similar to that of a rotary grinding mill without lifters, but each media particle imparts positve impact energy at each vibration.

The area where comminution takes place is larger and more efficient compared to a rotary grinding mill of similar size. There are no dead zones of inactive media inside the vibrating grinding mill. And, unlike stir or tower grinding mills which grind by attrition, the Vibra-Drum grinding mill uses the principle of impact grinding which causes clean breaking and does not coat the mineral/gangue with slimes.


VIBRA-DRUM® grinding mills excel over conventional ball, stirred media, or vertical roller mills in both grinding and energy efficiency.

  • Proven energy savings range from 35 to 50% reductions in kW hours per ton of processed material.
  • 5 to 10 times longer media life.
  • No trunnions, wheels, gears or drive reducers.
  • Few moving parts assures low maintenance.
  • Adjustable media action, from gentle to aggressive.
  • One half the liner requirements of typical
  • rotating designs.
  • Easily installed. Low dynamic reaction force
  • eliminates massive foundation requirements.