Separation of minerals using electrical fields

Ballantyne, G. and Holtham, Peter N. (2010). Separation of minerals using electrical fields. In: XXV International Mineral Processing Congress - IMPC 2010 'Smarter processing for the future. International Mineral Processing Congress 2010, Brisbane, Qld, Australia, (575-579). 6-10 september, 2010.

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Author Ballantyne, G.
Holtham, Peter N.
Title of paper Separation of minerals using electrical fields
Conference name International Mineral Processing Congress 2010
Conference location Brisbane, Qld, Australia
Conference dates 6-10 september, 2010
Convener Ralph J. Holmes
Proceedings title XXV International Mineral Processing Congress - IMPC 2010 'Smarter processing for the future
Journal name XXV International Mineral Processing Congress 2010, IMPC 2010
Place of Publication Carlton, VIC, Australia
Publisher Australasian Institute of Mining and Metallurgy
Publication Year 2010
Year available 2010
Sub-type Fully published paper
ISBN 9781921522284
Volume 1
Start page 575
End page 579
Total pages 5
Collection year 2011
Language eng
Abstract/Summary The mineral processing industry requires alternative separation techniques to help deal with rising energy costs and decreasing ore grades. Dielectrophoresis is one possible technology. It uses nonuniform electrical fields to separate particles on the basis of their permittivity. In order to determine its viability, the dielectrophoretic force was measured for individual chalcopyrite particles in ethanol. The measurements were made by attaching the individual particles to glass fi bres and measuring how far they were deflected by a non-uniform electrical field. Six sizes of chalcopyrite particles were tested and the force was found to increase as a function of particle radius cubed. The particles were also positioned at different points in the field in order to determine the effect of the electrical field gradient. The force was found to increase with the inverse cube of the distance from the centre of the particle to the pin electrode. With the effect of these parameters fully characterised, the single particle test cell can be used to determine the permittivity of single particles of various composition.
Keyword Dielectric constant
Permittivity
Electrical field
Chalcopyrite
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Thu, 09 Dec 2010, 09:27:34 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre