The appropriate and inappropriate application of the JKMRC t10 relationship

Powell, Malcolm, Hilden, Marko, Ballantyne, Grant, Liu, Lian and Tavares, Luis Marcelo (2014). The appropriate and inappropriate application of the JKMRC t10 relationship. In: Juan Yianatos, XXVIl International Mineral Processing Congress - IMPC 2014: Conference Proceedings. XXVII International Mineral Processing Congress - IMPC 2014, Santiago, Chile, (133-144). 20-24 October 2014.

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Name Description MIMEType Size Downloads
Author Powell, Malcolm
Hilden, Marko
Ballantyne, Grant
Liu, Lian
Tavares, Luis Marcelo
Title of paper The appropriate and inappropriate application of the JKMRC t10 relationship
Conference name XXVII International Mineral Processing Congress - IMPC 2014
Conference location Santiago, Chile
Conference dates 20-24 October 2014
Proceedings title XXVIl International Mineral Processing Congress - IMPC 2014: Conference Proceedings
Place of Publication Santiago, Chile
Publisher Gecamin Digital Publications
Publication Year 2014
Sub-type Fully published paper
Open Access Status
Editor Juan Yianatos
Start page 133
End page 144
Total pages 12
Collection year 2015
Language eng
Abstract/Summary The t10 relationship developed by Narayanan and Whiten has underpinned a number of the JKMRC models and the characterisation of ore competence through impact testing with the drop weight tester. This usefulness is based on a consistent relationship between the ho value and the overall size distribution that was noted for brittle rocks. However, like all characterisation tests this should be used only when the controlling conditions apply, which in this case is single impact breakage between two metal platens and within the range of sizes in which fragment sizes are normalizable. For any other mode of breakage the relationship should be confirmed before being applied. Soft ores or bimodal ores with widely different competence between dominant components have nontypical breakage signatures. Breakage via single point impact abrasion, compressed-bed breakage, low-energy surface breakage and incremental breakage, to name some of the other breakage modes, do not obey the general ho relationship, so their outcomes cannot be used to provide a direct comparison. Inappropriate use of the ho parameter can result in misleading conclusions about efficiency of energy use. These issues and alternative comparison techniques are presented and discussed in terms of choosing appropriate measures of efficiency of breakage, ore competence and energy required for comminution.
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Mon, 17 Nov 2014, 15:34:25 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre