Comminution is usually the heaviest energy-consuming process in the mine site. These days when efficiency concerns are becoming more and more important, developing a reliable and highly efficient way to grind and crush ore is a new field being explored by main industrial players. This paper focuses on variable speed operation as the answer to improving current tumbling mill grinding circuits. Benefits related to reliability, sophisticated functionalities for wear reduction and maintenance issues can be obtained using latest technology Variable Speed Drives (VSD). How they work and how they can be easily integrated in the comminution circuit is analysed and discussed. This paper describes how INGEDRIVE VSD systems develop all these features and functionalities, upgrading the grinding process to a new level with higher degrees of productivity and profitability.
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