At Ausenco, we are recognised for our expertise across all aspects of comminution

We offer quality solutions in comminution circuit design along with high-level process engineering expertise, management of feasibility studies, and complete services through trusted alliances and joint ventures.

Our people have a wide range of knowledge and experience in conventional stage crushing and SAG milling circuit designs, and are at the forefront of modelling and engineering of comminution circuits based on High Pressure Grinding Rolls (HPGR) technology. 

We also have extensive expertise in large mills with gearless drives and twin piston drives with associated motor specification. 

We offer our clients a range of comminution services over the full project lifecycle and a global network for design and delivery including:

  • sample selection, metallurgical test work program design, management and results interpretation
  • consulting:
    • process modelling and simulation (JKSimMet and in-house power model) 
    • independent review of process designs
    • review of existing operations and performance enhancement
    • energy efficiency assessments
  • trade-off options, optimisation and circuit/technology selection studies:
    • SAG
    • HPGR
    • stage crushing
  • scoping, prefeasibility and feasibility studies
  • basic and detailed design
  • construction support
  • commissioning assistance
  • operator training and operations support
  • mill specific energy calculation
  • mill size selection
  • mill drive selection
  • regrind mill evaluation.

Ausenco offers a complete package of comminution circuit testing, design and execution skills. We take test work data and design and install circuits that we guarantee will achieve specified throughput. We commission and provide operations support for our clients to enable them to achieve optimised performance. 

We are experts in the application of various ore characterisation methodologies including:  

  • SMC
  • SPI
  • Bond
  • Starkey SAG design.

To learn more about our capabilities and expertise in comminution, click on the related case studies or download our brochure in English, Spanish or Portuguese.

Key contacts

  • Greg Lane, Chief Technical Officer (
  • Paul Staples, Global Practice Lead, Minerals Processing (
  • Rajiv Chandramohan, Senior Process Engineer, Business Improvement and Comminution Consultant (