Using DEM to model industrial banana screens

Fernandez, J., Sinnott, M., Cleary, P. and Morrison, Robert D. (2010). Using DEM to model industrial banana screens. In: XXV International Mineral Processing Congress - IMPC 2010 'Smarter processing for the future. International Mineral Processing Congress 2010, Brisbane, Qld, Australia, (3187-3198). 6-10 September, 2010.

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Author Fernandez, J.
Sinnott, M.
Cleary, P.
Morrison, Robert D.
Title of paper Using DEM to model industrial banana screens
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 4
Start page 3187
End page 3198
Total pages 12
Collection year 2011
Language eng
Abstract/Summary Banana screens with multiple decks now dominate the process separation of a large proportion of two of Australia’s most valuable export commodities – iron ore and coal. Banana screens are high capacity vibrating screens with a curved profile. While popular, their optimisation provides many challenges because the lower decks are difficult to access for measurement or sampling. Furthermore, these screens have many adjustable parameters and are much less understood than conventional fl at vibrating screens. The C-MIS DEM code (developed by the CSIRO) is now sufficiently powerful to simulate several million particles within a practical time frame. Previous DEM models of vibratory screens are less realistic since they use spheres (or aggregates of spheres) to simulate particles in a process where particle shape is a critical factor. However, the C-MIS code can use ‘super quadric’ particles, which can represent a wide range of particle aspect ratios or distributions thereof. This paper reports on a fully dynamic DEM model of a full-scale banana screen, which includes the suspension of the screen and the actuators that provide the screen vibration. Hence, very detailed optimisation should be possible in due course. The paper firstly examines parametrically the dynamic behaviour of the banana screen due to variations in the rotating actuator weights, the mass of the deck, spring stiffness change and the ratio of transverse to vertical spring stiffness. Secondly, the separation efficiency of the top and lower decks of the banana screen is investigated for three different spring stiffness variants. The results of this investigation into the dynamic behaviour of the screen provide a basis for future optimisation of spring selection and actuator setup and contributes towards the development of a virtual banana screen that can inform operation and offer valuable design improvement.
Keyword Discrete element modelling
DEM
Banana screen
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Thu, 09 Dec 2010, 13:55:20 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre