Correlation Between Power and Lifters Forces in Grinding Mills

Correlation Between Power and Lifters Forces in Grinding Mills

Using a discrete element method (DEM) software, this paper develops a methodology to obtain the forces acting on each face of the lifters and on the liner plates of a grinding mill and its correlation to the mill torque and power. This analysis gives a clear view of the contribution of each lifter f...

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Bibliographic Details
Published in:IEEE transactions on industry applications Vol. 55; no. 4; pp. 4417 - 4427
Main Authors: Pulgar, Jose Venegas, Valenzuela, M. Anibal, Molina Vicuna, Cristian
Format: Journal Article
Language:English
Published: New York IEEE 01-07-2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Aluminum
Correlation
Discrete element method
Discrete element method (DEM)
Error analysis
Face
Force
grinder power
grinding mill
Grinding mills
Induction motors
lifter forces
mining industry
Software
Strain gauges
Synchronous motors
Torque
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Summary:Using a discrete element method (DEM) software, this paper develops a methodology to obtain the forces acting on each face of the lifters and on the liner plates of a grinding mill and its correlation to the mill torque and power. This analysis gives a clear view of the contribution of each lifter face to the torque and power. A pilot mill with a transparent cover charged with steel and aluminum balls is simulated in DEM, obtaining the forces in the lifters faces and the resulting torque and power. This power is compared to the power released by the DEM software and the power obtained from the strain gauge installed in the pilot mill. Results show an almost perfect matching between the power from the lifters forces and the DEM power, and a small error compared to the measured torque and power. The analysis of the shape, magnitude, and position of force pulses acting on the front and back faces of the lifters for different mill filling and speed is correlated to the power curves and gives a physical explanation of the shape and variations of the power.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2019.2910713