A review of the entrainment mechanism and its modelling in industrial flotation processes

Johnson, N. W. (2005). A review of the entrainment mechanism and its modelling in industrial flotation processes. In: Graeme J. Jameson, Conference Proceedings: Centenary of Flotation Symposium. Centenary of Flotation Symposium, Brisbane, Australia, (487-496). 6-9 June 2005.


Author Johnson, N. W.
Title of paper A review of the entrainment mechanism and its modelling in industrial flotation processes
Conference Paper Type Fully Published Paper
Conference name Centenary of Flotation Symposium
Conference location Brisbane, Australia
Conference dates 6-9 June 2005
Proceedings title Conference Proceedings: Centenary of Flotation Symposium
Editor Graeme J. Jameson
Place published Carlton South, Vic., Australia
Publisher Australasian Institute of Mining and Metallurgy (AusIMM)
Publication date 2005
ISBN 9781920806316; 1920806318
Start page 487
End page 496
Total pages 10
Collection year 2005
Language eng
Formatted Abstract/Summary This paper reviews the developments in understanding of the entrainment mechanism and its modelling in industrial flotation processes over the last 30 years. Both valuable and gangue minerals in the pulp zone of an industrial flotation machine can be transported through the froth zone to the concentrate launder in the water which must also be transferred from the pulp zone to maintain a stable froth zone in conventional flotation. A size dependent portion of each entrained mineral continues in normal circumstances to the concentrate launder. The size dependency arises because the larger particles are able to drain more successfully from the froth region. Gangue minerals are recovered by a number of mechanisms, entrainment being an important one in many cases.

The entrainment mechanism is discussed on the basis of the pattern observed in recovery – size data for minerals. Its industrial implications are discussed and means of minimisation of the importance of the mechanism are also discussed.

Various means proposed for mathematical modelling of the entrainment mechanism are also described. The effect of process variables on key parameters in these models is reviewed.

Properties of both the pulp and froth zones are discussed where needed and means of taking additional measurements with devices developed over the last ten years are discussed as part of the collection of more detailed data on the flotation process in general and the entrainment mechanism in particular.
Subjects E1
290702 Mineral Processing
640300 First Stage Treatment of Ores and Minerals
Keyword entrainment mechanism
industrial flotation
minerals
valuable
gangue
pulp zone
froth zone
processes
machine
Q-Index Code E1
Additional Notes Publication series (Australasian Institute of Mining and Metallurgy) ; 2005/5. -- Selected papers published in Minerals Engineering Volume 19, Issues 6-8, 2006

 
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Created: Thu, 23 Aug 2007, 21:30:39 EST