How to use hard ore components as grinding media

Bueno, M. P. and Powell, M. S. (2012). How to use hard ore components as grinding media. In: Peter Hills (Conference Chair), Proceedings: 11th AusIMM Mill Operators' Conference 2012. 11th AusIMM Mill Operators' Conference 2012, Hobart,Tasmania, (31-35). 29-31 October 2012.

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Name Description MIMEType Size Downloads
Author Bueno, M. P.
Powell, M. S.
Title of paper How to use hard ore components as grinding media
Conference name 11th AusIMM Mill Operators' Conference 2012
Conference location Hobart,Tasmania
Conference dates 29-31 October 2012
Proceedings title Proceedings: 11th AusIMM Mill Operators' Conference 2012
Place of Publication Carlton, Victoria
Publisher AusIMM: Australasian Institute of Mining and Metallurgy
Publication Year 2012
Sub-type Fully published paper
ISBN 9781921522734
Editor Peter Hills (Conference Chair)
Start page 31
End page 35
Total pages 5
Collection year 2013
Language eng
Formatted Abstract/Summary
The commonly used SAB, SABC and run-of-mine (ROM) ball mill circuits can achieve high
throughputs with good operating stability. However, these circuits consume a substantial amount
of grinding media, which can have a substantial impact on the OPEX and the 'carbon footprint',
specifically when viewed as an 'embodied' energy input.
     On the other hand, fully autogenous (AG) circuits can operate at much lower operating costs,
but with limited throughput. The control of AG mills, fed by ores with hard and soft components,
can also be challenging, due to the sensitivity of the mill to the ratio of hard to soft components.
     In this paper, a multi-component modelling approach was used to demonstrate that the harder
component should be used as grinding media, and its use should be kept to a minimum to avoid
reduction in the mill throughput. There is an optimal blend of hard to soft, and any optimal
blending condition is both ore-dependent and mill-specific. Establishing this blend is challenging,
and consequently discourages the use of autogenous mills. The new modelling approach
addresses this challenge by providing a quantitative prediction of the influence of blending soft
and hard components in a mill. This prediction can then be used to establish the required blend
for maintaining a stable and efficient operation in autogenous grinding mode.
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

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Created: Mon, 05 Nov 2012, 14:38:41 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre