Empirical Determination of the Effect of Lifter Wear in Mill Power for Dry Grinding

Grinding stage has one of the highest production costs in mining operations due to the intensive use of energy needed for the comminution process. Hence, any improvement in the energy use of this process will have an important impact on production costs. Paper presents the results of an extensive te...

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Bibliographic Details
Published in:IEEE transactions on industry applications 2017-05, Vol.53 (3), p.2621-2627
Main Authors: Varas, Richard A. Cartes, Valenzuela, M. Anibal
Format: Article
Language:English
Subjects:
Ball mill
Comminution
Dry grinding
Energy consumption
Face
Grinding mills
Industrial engineering
Kidney
lifter wear
liner wear
Manufacturing engineering
mining process
Ores
Production
Production costs
sag mill
Testing
Torque
Velocity control
Wear
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Summary:Grinding stage has one of the highest production costs in mining operations due to the intensive use of energy needed for the comminution process. Hence, any improvement in the energy use of this process will have an important impact on production costs. Paper presents the results of an extensive testing program to determine the effect of lifter wear on the power demanded by the grinding mill. Selected power-speed curves covering up to 110% of critical speed are reported. Using these results, a lifter wear factor is proposed to include this effect on the power demand expressions of grinding mills. Results show that for dry grinding, as the lifters wear, the power needed for a specific operating condition increases. Using these results, mill operators will have an important piece of information to set the best operating point for an efficient ore comminution and efficient energy consumption. It will also help to define the appropriate date for a liner change.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2017.2661844