Grinding Mill an overview . ScienceDirect Topics
The grinding medium may be steel rods, balls, or rock itself. . Tumbling mills are typically employed in the mineral industry for primary grinding (i.e., stage immediately . is generally of the order of 200 MPa, but for hard ores, higher pressures are required. ... Lawrison  gave a value of 55 for chert and 35 for dolomite.
The Effects of Lifter Configurations and Mill Speeds . AIP Publishing
2Department of Mining Engineering, University of Syiah Kuala, . Keywords: grinding mills, lifter shapes, mill speed, mill power draw, ball trajectory . grinding media (steel balls), mill load and speed. . that to attain a higher impact value and impact frequency, which may lead to higher overall efficiency, one should increase.Live Chat