The physical basis of non random breakage in an iron-oxide hosted copper gold ore

Vizcarra, Timothy, Wightman, Elaine M., Johnson, N. W. and Manlapig, Emmanuel (2010). The physical basis of non random breakage in an iron-oxide hosted copper gold ore. In: XXV International Mineral Processing Congress - IMPC 2010 'Smarter processing for the future. International Mineral Processing Congress 2010, Brisbane, Qld, Australia, (1343-1350). 6-10 September, 2010.

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Author Vizcarra, Timothy
Wightman, Elaine M.
Johnson, N. W.
Manlapig, Emmanuel
Title of paper The physical basis of non random breakage in an iron-oxide hosted copper gold ore
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
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
Start page 1343
End page 1350
Total pages 8
Collection year 2011
Language eng
Abstract/Summary The properties that contribute to the non-random breakage of mineral phases within ores are explored in this study. An iron-oxide/quartz/silicate ore was comminuted in a hammer mill and size-by-size liberation properties of progeny particles were characterised using a Mineral Liberation Analyser (MLA) – a mineralogical characterisation system based on automated scanning electron microscopy. Following breakage, it was found that magnetite phases reported primarily to high-grade liberation classes, while quartz phases reported to low and medium-grade composite classes. This was despite the two phases sharing similar mineralogical locking characteristics with surrounding silicate gangue. Micro-indentation data from the literature revealed that these effects were likely due to differences in the mechanical properties of the various mineral phases. The results are discussed in the context of the development of fundamental, computational breakage and liberation models.
Keyword Comminution
Mineral liberation
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Mon, 20 Dec 2010, 13:29:46 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre