Comminution is incredibly energy-intensive, and improving efficiency not only save mining operations money but also reduces their ecological footprint. This working group aims to assist the industry by defining methods and best practices for the industry.


Comminution circuits currently account for the highest energy usage in the mining industry, which results in a considerable operating cost and environmental impact in energy consumption. Therefore, the effective management of comminution circuits is required to ensure a sustainable operation and reduce costs. These benefits can be achieved through establishing best practices, performing benchmarking and defining standardized metrics and methodologies. 


The Industrial Comminution Efficiency Working Group aims to provide tools for practitioners to measure the energy efficiency of comminution circuits using standardized metrics and methodologies. The guidelines developed by this group aim to define the recommended methods for quantifying grinding circuit efficiency using grinding power analysis, following the approaches developed by Bond (1961) and Morrell (2009). The group is a community of interest that includes operators, suppliers, subject-matter experts interested in improving comminution efficiency in their operations.


  • Define standard methods for quantifying grinding circuit efficiency using grinding power analysis
  • Coordinate a global network of multi-disciplinary and multi-sector professionals with knowledge on comminution efficiency to share lessons learned, best practices and drive valuable conversations
  • Enable a centre of knowledge, training and sharing on the topic of comminution efficiency


2016 Aug | Morrell method for determining comminution circuit specific energy and assessing energy utilization efficiency of existing circuits

The guideline reviews the data required for the analysis, including hardness characterization data generated from the SMC Test®, the Bond Ball Mill Test Work Index and the Morrell equations and their application.

 2016 Apr | Methods to survey and sample grinding circuits for determining energy efficiency

This guideline details methods to survey and sample grinding circuits to generate sufficient information of suitable quality to support reliable efficiency analysis by these and comparable methods. It deals specifically with surveying and sampling Autogenous Grinding (AG), Semi-Autogenous Grinding (SAG), rod, and ball mill circuits operating within the normal range of application. 

2016 Feb | Determining the Bond Efficiency of industrial grinding circuits

The Bond method allows for quantification and comparison of relative energy efficiencies of most industrial communication circuits. It is an essential tool for managing the important business (cost) of grinding.


UPCOMING VIRTUAL MEETING. The Industrial Comminution Efficiency Working Group will be meeting on mid-April to redefine the direction of the group and discuss potential projects. Stay tune!

STEERING COMMITTEE MEETING UPCOMING UP. The governing group of the Industrial Comminution Efficiency Working Group will gather on March 17 to discuss the key-priorities and strategy for the team.