Discrete element modelling of power draw of tumbling mills

Djordjevic, N. (2003) Discrete element modelling of power draw of tumbling mills. Transactions of the Institution of Mining and Metallurgy Section C- Mineral Processing and Extractive Metallurgy, 112 2: 109-114.

Author Djordjevic, N.
Title Discrete element modelling of power draw of tumbling mills
Journal name Transactions of the Institution of Mining and Metallurgy Section C- Mineral Processing and Extractive Metallurgy   Check publisher's open access policy
ISSN 0371-9553
Publication date 2003
Sub-type Article (original research)
Volume 112
Issue 2
Start page 109
End page 114
Total pages 6
Editor Dr S. N. Dunston (Managing Editor)
Place of publication Leeds, England
Publisher Maney Publishing
Collection year 2003
Language eng
Subject C1
290702 Mineral Processing
640399 Other
Abstract The power required to operate large mills is typically 5-10 MW. Hence, optimisation of power consumption will have a significant impact on overall economic performance and environmental impact. Power draw modelling results using the discrete element code PFC3D have been compared with results derived from the widely used empirical Model of Morrell. This is achieved by calculating the power draw for a range of operating conditions for constant mill size and fill factor using two modelling approaches. fThe discrete element modelling results show that, apart from density, selection of the appropriate material damping ratio is critical for the accuracy of modelling of the mill power draw. The relative insensitivity of the power draw to the material stiffness allows selection of moderate stiffness values, which result in acceptable computation time. The results obtained confirm that modelling of the power draw for a vertical slice of the mill, of thickness 20% of the mill length, is a reliable substitute for modelling the full mill. The power draw predictions from PFC3D show good agreement with those obtained using the empirical model. Due to its inherent flexibility, power draw modelling using PFC3D appears to be a viable and attractive alternative to empirical models where necessary code and computer power are available.
Keyword Metallurgy & Metallurgical Engineering
Mineralogy
Mining & Mineral Processing
tumbling mlls
modelling
power consuniption
wear
Ball Mills
Q-Index Code C1

 
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