Exploring the breakage environment in mills with discrete element methods

Weerasekara, Nirmal and Powell, Malcolm (2010). Exploring the breakage environment in mills with discrete element methods. In: XXV International Mineral Processing Congress - IMPC 2010 'Smarter processing for the future. International Mineral Processing Congress 2010, Brisbane, Qld, Australia, (1357-1365). 6-10 September, 2010.

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Author Weerasekara, Nirmal
Powell, Malcolm
Title of paper Exploring the breakage environment in mills with discrete element methods
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 1357
End page 1365
Total pages 9
Collection year 2011
Language eng
Abstract/Summary The ability to incorporate and resolve the complex physics governing comminution devices like tumbling mills is becoming more feasible and efficient, with the new developments in Discrete Element Methods (DEM) techniques and a corresponding increase in computational power. The DEM is quite capable of predicting the mechanical environment for a given mill configuration, which provides the rate at which different classes of particle interact for each defined mode of collision. A range of information can be extracted on individual particle impact histories, such as kinetic energy at the time of collision, normal and tangential collision energy, contact angle, particle velocities, force, impulse, etc. DEM codes have been modifi ed to provide the required data, and independent analysis techniques and associated software have been developed for detailed data extraction from the huge DEM data sets. The ability to run a large number of DEM simulations and data analysis provides the opportunity to resolve the breakage environment in mills. This provides breakage models such as the Unifi ed Comminution Model (UCM) with a full range of information needed on the mill mechanical environment for a wide range of mill operating conditions. Furthermore, this information provides an insight into the mechanics and drivers of milling that in itself can be used in improving mill design and operation. This paper explores the breakage environment in mills using DEM techniques, and how these techniques may be expanded to provide even more useful data for mill and comminution device modelling.
Keyword DEM
Comminution
Tumbling mills
Breakage
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Mon, 20 Dec 2010, 14:05:58 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre