Developments in incremental rock breakage testing methodologies and modelling

Bonfils, B. and Powell, M. S. (2013). Developments in incremental rock breakage testing methodologies and modelling. In: Arno Kwade, Sandra Breitung-Faes and Denise Steiner, Conference Proceedings: European Symposium on Comminution & Classification. ESCC2013: 13th European Symposium on Comminution and Classification, Braunschweig, Germany, (165-168). 9-12 September, 2013.

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Name Description MIMEType Size Downloads
Author Bonfils, B.
Powell, M. S.
Title of paper Developments in incremental rock breakage testing methodologies and modelling
Conference name ESCC2013: 13th European Symposium on Comminution and Classification
Conference location Braunschweig, Germany
Conference dates 9-12 September, 2013
Proceedings title Conference Proceedings: European Symposium on Comminution & Classification
Place of Publication Göttingen, Germany
Publisher Sierke Verlag
Publication Year 2013
Sub-type Fully published paper
ISBN 9783868445510
9783868445527
Editor Arno Kwade
Sandra Breitung-Faes
Denise Steiner
Start page 165
End page 168
Total pages 4
Collection year 2014
Language eng
Formatted Abstract/Summary
In most standard comminution tests, particles are broken with relatively high energy single impact events. However many of the breakage events inside industrial mills are due to relatively low energy collisions that accumulate damage over time. Incremental breakage, as it is known, occurs across a wide range of equipment and milling operations. The authors have investigated breakage probabilities of ore during these repetitive impacts. All testing was conducted using a JKRBT (Rotary Breakage Tester) so as to minimise variability in applied energy. A standardised procedure has been developed for incremental breakage testing which allows for unbroken particles after each breakage event to be processed again in the JKRBT for repetitive impacts. Breakage probability is then calculated from the relative mass of broken particles. The test results show that incremental breakage occurs under repetitive impact and the JKRBT is a suitable device for incremental testing. Breakage probabilities have then been modelled using the Vogel and Peukert method for multiple impacts with a slightly modified equation. Influence of particle shapes and the applicability of this model to rock breakage are discussed, as well as the influence of the minimum energy of comminution, Emin.
Keyword Breakage
Impact
Incremental
Testing methodology
Breakage probability
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Presented during Session 2.23: "Single Particle Stressing".

 
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Created: Tue, 05 Nov 2013, 12:14:30 EST by Karen Holtham on behalf of Sustainable Minerals Institute