Comminution – Scrubbing

Ore scrubbing has the potential to add enormous value to minerals projects by liberating ore from waste to allow beneficiation

Scrubbing can assist with the removal of gangue and other deleterious minerals thereby upgrading the feed to down stream processing. This process has the potential to significantly reduce capital and operating costs for a project by improving economics.


Scrubbing prior to secondary or tertiary crushing in some difficult ore types improves the performance of cone crushers, by removing clay-like material, reducing bowl packing, increasing throughput and screening efficiency. Scrubbing may also allow the removal of fine, product sized material prior to milling, reducing the size of the comminution equipment, lowering energy requirements and limiting over grinding.


The inclusion or exclusion of scrubbing processes in new and existing flowsheets is a crucial decision for projects, which can potentially make the difference between economic and sub economic performance. OMC’s experience with scrubbing and metallurgical flowsheet design can prove to be invaluable in this process.

minerals consultants
minerals consultants

OMC have gained extensive knowledge in the interpretation and application of batch and pilot plant scrubbing testwork to a large and varied array of projects and commodities. Understanding sampling requirements and scale-up from testwork to full size are crucial to allow the accurate design of the scrubber dimensions, determination of power requirements, and identification of operating envelopes; all critical to the success of an installation.


OMC’s experience in this area is transferable to our clients through the generation of mass balance flow sheets, equipment specification and operating cost predictions. As a project partner, OMC can assist clients through Scoping Studies, Pre-feasibility and Bankable Feasibility stages, taking a project from preliminary definition right through to the commissioning and optimisation.

OMC can provide expertise in:


  • Specification and interpretation of scrubbing testwork
  • Identification and quantification beneficiation potential
  • Establishment of process design criteria
  • Flowsheet design
  • Process modelling and mass balances
  • Analysis of circuit options
  • Major equipment selection
  • Wear and OPEX estimation
  • P&IDs and plant control philosophy
  • Design audits
  • Commissioning support
  • Process risk mitigation strategy


minerals consultants

Analyse, Model, Optimise