Experimental and numerical studies of selective fragmentation of mineral ores in electrical comminution

Wang, Eric, Shi, Fengnian and Manlapig, Emmy (2012) Experimental and numerical studies of selective fragmentation of mineral ores in electrical comminution. International Journal of Mineral Processing, 112-113 : 30-36.


Author Wang, Eric
Shi, Fengnian
Manlapig, Emmy
Title Experimental and numerical studies of selective fragmentation of mineral ores in electrical comminution
Journal name International Journal of Mineral Processing  (ERA 2012 Listed)    (ERA 2010 Rank A*)   Check publisher's open access policy
Publication date 2012-09-10
Sub-type Article
DOI 10.1016/j.minpro.2012.07.005
Volume number 112-113
ISSN 0301-7516
Start page 30
End page 36
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2013
Language eng
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 has 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.
Keyword High voltage pulse breakage
Energy efficiency
Selective fragmentation
Numerical simulation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Special Issue Communition 2009

 
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Created: Tue, 17 Jul 2012, 13:16:26 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre