Abstract
In this study, the particle size distribution, fractal dimension, specific energy consumption, and grinding kinetics of chalcopyrite ore under high voltage pulse discharge were systematically discussed. With the increase in voltage and pulse numbers, the undersize content and reduction ratio gradually increased, and the characteristic particle sizes decreased. The dispersion degree of particle size distribution increased and the uniformity became worse. The particle size distribution of breakage products under different voltages and pulse numbers could be described by the Harris three parameter equation. The characteristic particle size D80 gradually decreased and the reduction ratio gradually increased with the increase in specific energy consumption. The specific energy consumption of high voltage pulse discharge breakage was described by the Walker theory (E= 215.13×(1x0.33-1120.33)). Besides, the high voltage pulse discharge could significantly reduce the mechanical strength of ore and improve its grinding efficiency.
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