Swiss Tower Mills Minerals AG


Unlock outstanding grinding performance and unequalled energy efficiency with vertical stirred mills from Swiss Tower Mills Minerals AG (STM).

The STM vertical stirred mills set a new benchmark in the mineral processing industry in over 80 installations and duties. The high energy efficiency and advanced internal grinding process yield exceptional improvements in mineral recoveries.

The long term success in ultra fine and fine grinding lead STM to expand the product to coarse grinding applications and are now taking over duties from energy and media inefficient horizontal ball mills.

Product History

Original Patented design developed over last 40 years by Swiss based private company for its own use in industrial minerals 

  • Typical product down to 1 μm, high SGE 100-200 kWh/t 
  • Over 200 mills installed on all continents 
  • Largest stirred mills in operation worldwide 
  • 9 units of 5 MW (operating for 20 years) 

Swiss Tower Mills owns the exclusive license of the technology for the base and precious metals processing industry 

  • 10 years of installation, application and continuous improvement 
  • Patented grinding components, improve wear life and grinding efficiency 
  • Expanded product range and product families for ultra fine to coarse applications and 75kW to 12,500kW installed power and 200L to 75,000L volume 
  • Continuous development of new ancillary and operational support systems