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The comminution of multicomponent feeds under batch and locked-cycle conditions: Kinetics, simulation and energy distribution.
Fuerstenau DW; Venkataraman KS
Int J Miner Proc 1988 Apr; 22(1-4):105-118
The results of a detailed investigation of batch and locked-cycle dry grinding of quartz-calcite mixtures in a laboratory ball mill are presented. Batch grinding tests showed that the breakage rate function of the components is time-independent but composition-dependent and is normalizable with specific energy. Locked-cycle tests on the mineral mixtures revealed that approximately 25 2-min cycles are required before the composition of the circuit product and the recycle material attains steady state. The circulating load, after steadily increasing during the first 15 cycles, continued to fluctuate over a narrow range. These findings indicate that industrial-scale grinding circuits may also have long transient periods as the grindability of the ore changes and that circuits might be in transience perpetually.
Mineral processing; Milling industry; Grinding mills; Minerals; Laboratory testing; Kinetics; Quartz; Calcium carbonate; Simulation methods
K. S. Venkataraman, Department of Materials Science and Mineral Engineering, University of California, Berkeley, CA 94720 USA
Issue of Publication
International Journal of Mineral Processing
University of CA--Berkeley
Page last reviewed: July 30, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division