Experimental studies and modeling of surface bubble behaviour in froth flotation

Park, Hangil and Wang, Liguang (2015) Experimental studies and modeling of surface bubble behaviour in froth flotation. Chemical Engineering Research and Design, 101 98-106. doi:10.1016/j.cherd.2015.04.021

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Author Park, Hangil
Wang, Liguang
Title Experimental studies and modeling of surface bubble behaviour in froth flotation
Journal name Chemical Engineering Research and Design   Check publisher's open access policy
ISSN 0263-8762
Publication date 2015-04-29
Sub-type Article (original research)
DOI 10.1016/j.cherd.2015.04.021
Volume 101
Start page 98
End page 106
Total pages 9
Place of publication London, United Kingdom
Publisher Elsevier
Collection year 2016
Language eng
Formatted abstract
Froth flotation is a versatile, widely used beneficiation technique employing air bubbles to selectively pick up certain particles in aqueous medium. The performance of the flotation process is significantly affected by froth stability and mobility, posing the need for precise control of the froth phase. The present paper aims to understand the motion of bubbles entering the froth phase from the pulp phase at different locations. The horizontal velocities of air bubbles across the top surface of the froth containing fine coal particles were measured. The results showed that at the region farthest from the froth discharge lip, no horizontal movement of the surface bubbles could be observed, and when approaching the lip there would be an increase in the horizontal velocity. The measured velocity profile was fitted to a froth model that considers the cumulative air recovery as a function of location. Six different types of cumulative air recovery functions were tested. The coefficient of determination (R2) and the Akaike information criterion were applied to select the cumulative air recovery function with best fit to describe the horizontal velocity profile. The selected cumulative air recovery function was in a simple power-law form.
Keyword Froth stability
Coal flotation
Transport model
Air recovery
Froth velocity
Q-Index Code CX
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 29 April 2015

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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Created: Sat, 23 May 2015, 17:30:06 EST by Dr Liguang Wang on behalf of School of Chemical Engineering