The effect of microwave pretreatment on impact breakage of copper ore

Rizmanoski, Vladimir (2011) The effect of microwave pretreatment on impact breakage of copper ore. Minerals Engineering, 24 14: 1609-1618. doi:10.1016/j.mineng.2011.08.017


Author Rizmanoski, Vladimir
Title The effect of microwave pretreatment on impact breakage of copper ore
Journal name Minerals Engineering   Check publisher's open access policy
ISSN 0892-6875
1872-9444
Publication date 2011-11-01
Sub-type Article (original research)
DOI 10.1016/j.mineng.2011.08.017
Volume 24
Issue 14
Start page 1609
End page 1618
Total pages 10
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Language eng
Abstract It has been shown that very short exposures to a high level of microwave power lead to reductions in ore strength. In this paper, the influence of modulated microwave power on copper ore breakage has been investigated. This approach to power delivery is applied to ascertain whether the strength of porphyry copper ore can be reduced with lower average modulated power levels than using continuous power. Changes in resistance to breakage of the treated and untreated ore were quantified by comparative drop weight tests. Mineralogical investigation for the ore was carried out with the Mineral Liberation Analyser (MLA) for surface identification of minerals and X-ray tomography for volumetric analysis. The comparative drop weight tests showed that material treated for 5 s at 5 kW of modulated power was weaker than untreated material. However, for this particular low grade ore, the degree of breakage which was achieved could be achieved with substantially less mechanical energy. It is possible that by using much higher level of microwave power, better liberation might be achieved than using conventional methods.
Keyword Microwave treatment
Impact breakage
Microwave applicator
X-ray tomography
Mineral Liberation Analyser (MLA)
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Julius Kruttschnitt Mineral Research Centre Publications
Official 2012 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 22 Sep 2011, 18:44:51 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre