Correlation of air recovery with thin film and froth stability in flotation

Wang, Liguang, Qu, Xuan and Nguyen, Anh V. (2010). Correlation of air recovery with thin film and froth stability in flotation. In: XXV International Mineral Processing Congress - IMPC 2010 'Smarter processing for the future. International Mineral Processing Congress 2010, Brisbane, Qld, Australia, (2495-2501). 6 -10 September 2010.

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Name Description MIMEType Size Downloads
Author Wang, Liguang
Qu, Xuan
Nguyen, Anh V.
Title of paper Correlation of air recovery with thin film and froth stability in flotation
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
Place of Publication Carlton, Vic., Australia
Publisher Australasian Institute of Mining and Metallurgy
Publication Year 2010
Sub-type Fully published paper
ISBN 9781921522284
1921522283
Start page 2495
End page 2501
Total pages 7
Collection year 2011
Language eng
Abstract/Summary Froth stability determines flotation product grade, throughput and coarse particle recovery. Despite its importance, little is known about the fundamental factors affecting froth stability. Recent work by others shows that froth stability can be represented by air recovery, the fraction of air entering a flotation cell that overflows the weir in unburst bubbles. In the present work, the relationship between air recovery and the stability of froth and inter-bubble liquid lamellae (foam films) is explored. The air recovery was measured as a function of methyl isobutyl carbinol (MIBC) concentration with 5 × 10-5 M NaCl in the presence and absence of solid particles using a laboratory-scale mechanical fl otation cell. Froth stability was characterised using a number of methods including acoustic emission measurement. The stability of the corresponding foam films was characterised by using the thin fi lm pressure balance technique. The variation of film and froth stability with the MIBC concentration was compared with the changes in air recovery. The air recovery correlated well with froth stability. The considerable deviation between air recovery and static film stability implies the important role of hydrodynamic conditions in determining froth stability in a flotation cell.
Keyword Air recovery
Froth flotation
Froth stability
Liquid lamellae
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Conference Paper
Collections: School of Chemical Engineering Publications
Official 2011 Collection
 
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Created: Fri, 26 Nov 2010, 11:45:58 EST by Dr Liguang Wang on behalf of School of Chemical Engineering