Article ID Journal Published Year Pages File Type
214104 International Journal of Mineral Processing 2012 7 Pages PDF
Abstract

An experiment was conducted in which two sulphide ores and one platinum ore were each subjected to high voltage pulses and mechanical breakage, with the same specific energy input, in order to compare the mineral modal abundance and grade in the two comminution products. The data from this experiment have provided unambiguous evidence of greater enrichment of the minerals with high conductivity/permittivity in the less than 0.3 mm size fractions of the electrical comminution product. Numerical simulations using COULOMB 3D indicated that with the existence of an electrical potential difference in the system, a high electrical field intensity was created around the boundary of the minerals with high conductivity/permittivity, causing selective fragmentation, thereby elucidating and supporting the experimental findings.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Enrichment of valuable minerals in electrical comminution product ► High electrical field intensity around the boundary of minerals with high permittivity ► Preferential breakage along the grain boundaries of minerals.

Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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