HPGR Rolls Surface Wear: In-line Scanning of a Laboratory-Scale HPGR

  • Samira RashidiEmail author
  • Raj K. Rajamani


High pressure grinding rolls have been utilized in various operations during the past four decades, simply due to their inherent mode of breakage that offers metallurgical benefits with pronounced energy reduction. For every new application, wear and in particular roll surface wear protection has always been the focal point of HPGR trade-off studies. Wear remains an important issue throughout a mine’s life given inevitable variations in the ore deposits properties. Hence, the capability of continuous scanning of rolls provides ample information about any deviations in the design values as well as their effect on the wear pattern. In part I of this manuscript, we present the feasibility of in-line scanning of roll surface in a 200 × 100 mm lab-scale HPGR. First, the in-line scanning was developed in a mock-up roll and then the scanner was moved to the laboratory-scale HPGR. We present the choice of scanners and the methods adopted to achieve high-level accuracy of determining wear. Even though we planned for micron-level precision of scanning, the inherent variability in shaft rotation was higher than the variability in the roll diameter due to wear. The hundred-kilogram mass processed in the HPGR was not sufficient to create enough wear that is discernible to the in-line scanner. Yet, the method tested is a promising avenue for in-line scanning of HPGR rolls.


High pressure grinding rolls Wear Roll surface protection In-line wear scanning Computational calculations 



Authors wish to thank Newmont Mining Corporations for funding this research as part of a broader HPGR study and for supplying ore samples for the test work.

Compliance with Ethical Standards

Conflict of Interest

This study was funded by Newmont Mining Corporation.


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Copyright information

© Society for Mining, Metallurgy & Exploration Inc. 2019

Authors and Affiliations

  1. 1.Department of Metallurgical Engineering, College of Mines and Earth SciencesUniversity of UtahSalt Lake CityUSA
  2. 2.thyssenkrupp Industrial Solutions (USA), Inc.AtlantaUSA

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