Development of new comminution testing methodologies for geometallurgical mapping of ore hardness and throughput

Kojovic, Toni, Michaux, Simon P. and Walters, Stephen (2010). Development of new comminution testing methodologies for geometallurgical mapping of ore hardness and throughput. In: XXV International Mineral Processing Congress - IMPC 2010 'Smarter processing for the future. International Mineral Processing Congress 2010, Brisbane, Qld, Australia, (891-899). 6-10 September, 2010.

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Author Kojovic, Toni
Michaux, Simon P.
Walters, Stephen
Title of paper Development of new comminution testing methodologies for geometallurgical mapping of ore hardness and throughput
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 2
Start page 891
End page 899
Total pages 9
Collection year 2011
Language eng
Abstract/Summary The emerging discipline of ‘geometallurgy’ is becoming increasingly recognised as a discrete and high-value activity that reflects an ongoing trend towards more effective mine site integration and optimisation. Constrained sampling that reflects and defines inherent ore body variability is a key geometallurgical requirement. This requires use of larger numbers of low-cost physical testing which can be applied to small sample volumes suitable for defining natural variability. The AMIRA P843 ‘GeMIII’ project (Geometallurgical Mapping and Mine Modelling) is a major industry-supported research initiative designed to develop new tools, methods and protocols to support geometallurgical integration. As part of this integrated research a new more rapid low-cost comminution test (GeM Comminution index) has been developed which can be employed as a front line tool for geometallurgical mapping purposes and predictive throughput modelling. The test has been designed to be inserted into routine assay sample preparation and is based on constrained jaw crushing protocols linked to analysis of resultant size distributions. Extensive validation and modelling has shown the GeM Comminution Index (Ci) is correlated with the Drop Weight index A*b and Bond Mill Work Index (BMWi). Large scale trials have been conducted within a commercial assay laboratory to demonstrate and optimise incorporation of the Ci test into routine sample preparation protocols. While Ci based estimates of A*b and BMWi are not as precise compared to larger volume more expensive test-work, the ability to undertake large numbers of tests typically in a systematic downhole manner, provides a high level of data support through adjacency. A Ci based approach is highly suitable for variability mapping, domaining and selecting large composite samples for more precise testing. Within the context of the AMIRA P843 project this forms part of an integrated work fl ow designed to support geometallurgical integration. The development of a comminution test linked to routine assay sample preparation represents significant value adding to a process that in most cases is already going to be carried out. This paper introduces the Ci test concept and application to geometallurgical testing for throughput modelling.
Keyword Geometallurgy
Comminution testing
Crushing
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Thu, 09 Dec 2010, 16:11:17 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre