Validation of the generalised Sutherland equation for bubble-particle encounter efficiency in flotation: Effect of particle density

Nguyen, Phong T. and Nguyen, Anh V. (2009) Validation of the generalised Sutherland equation for bubble-particle encounter efficiency in flotation: Effect of particle density. Minerals Engineering, 22 2: 176-181. doi:10.1016/j.mineng.2008.06.004


Author Nguyen, Phong T.
Nguyen, Anh V.
Title Validation of the generalised Sutherland equation for bubble-particle encounter efficiency in flotation: Effect of particle density
Journal name Minerals Engineering   Check publisher's open access policy
ISSN 0892-6875
1872-9444
Publication date 2009-01-01
Year available 2008
Sub-type Article (original research)
DOI 10.1016/j.mineng.2008.06.004
Open Access Status Not yet assessed
Volume 22
Issue 2
Start page 176
End page 181
Total pages 6
Editor B. A. Wills
Place of publication Oxford, U.K.
Publisher Pergamon Press
Language eng
Subject C1
0904 Chemical Engineering
970109 Expanding Knowledge in Engineering
Abstract Bubble-particle encounter interaction is the first step of the particle collection by rising air bubbles in flotation and has been predicted based on the potential flow condition by Sutherland and others, leading to the approximate generalised Sutherland equation (GSE). In this paper, the bubble-particle encounter interaction with the potential flow condition has been analysed by solving the full motion equation for the particle employing a numerical computational approach. Together with other inertial forces, the gravitational forces were fully included in the motion equation. The numerical results were compared with the GSE models for the encounter efficiency. The effect of particle density on the encounter interaction was very significant and could counterbalance the "negative" effect of the inertial forces on the particle interaction with air bubbles with a mobile surface under the potential flow condition. For the typical particle size range used in flotation, significant deviation of the Sutherland approximate models from the numerical results due to the particle density effect and gravitational forces was observed. © 2008 Elsevier Ltd. All rights reserved.
Keyword Flotation bubble
Flotation kinetics
Froth flotation
Air bubbles
Attachment
Collision
Probability
Surfaces
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Available online 24 July 2008.

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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Created: Thu, 03 Sep 2009, 18:40:10 EST by Mr Andrew Martlew on behalf of School of Chemical Engineering