Plant Performance Improvements Using Grinding Circuit “Classification System Efficiency”


“Classification System Efficiency (CSE)” is a simple, powerful concept which can be used to measure and improve ball mill circuit efficiency. This paper describes six plant case studies which demonstrate the use of CSE to diagnose and/or improve grinding circuit performance, with related improvements in circuit efficiency ranging from 3 to 30 percent. The increased effective mill grinding energy is recaptured from energy that was going into over grinding, which can greatly benefit downstream mineral separation. The achievable CSE for given circuit design/operating variables is described, providing every plant metallurgist with the means to determine the potential for increasing their particular grinding circuit’s efficiency through increased CSE.

Robert E. McIvor, Chief Metallurgist – Grinding Systems

Metcom Technologies, Inc.

1021 W. Baraga Ave., Suite B

Marquette, MI, USA 49855

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© 2012, SME and Metcom Technologies, Inc. A full copy of this publication may be obtained by contracting the author.