A comparison between capillary and imaging techniques for sizing bubbles in flotation systems

Hernandez-Aguilar, J. R., Coleman, R. G., Gomez, C. O. and Finch, J. A. (2004) A comparison between capillary and imaging techniques for sizing bubbles in flotation systems. Minerals Engineering, 17 1: 53-61.


Author Hernandez-Aguilar, J. R.
Coleman, R. G.
Gomez, C. O.
Finch, J. A.
Title A comparison between capillary and imaging techniques for sizing bubbles in flotation systems
Journal name Minerals Engineering  (ERA 2012 Listed)    (ERA 2010 Rank A*)   Check publisher's open access policy
Publication date 2004
Sub-type Article
DOI 10.1016/j.mineng.2003.09.011
Volume number 17
Issue number 1
ISSN 0892-6875
Start page 53
End page 61
Total pages 9
Editor B. A. Wills
Place of publication Oxford, UK
Publisher Elsevier Ltd.
Collection year 2004
Language eng
Subject C1
290702 Mineral Processing
640300 First Stage Treatment of Ores and Minerals
Abstract This communication reports a laboratory and plant comparison between the University of Cape Town (UCT) device (capillary) and the McGill University bubble sizing method (imaging). The laboratory work was conducted on single bubbles to establish the accuracy of the techniques by comparing with a reference method (capture in a burette). Single bubble measurements with the McGill University technique showed a tendency to slightly underestimate (4% for a 1.3 mm bubble) and the UCT technique to slightly overestimate (1% for the 1.3 man bubble). Both trends are anticipated from fundamental considerations. In the UCT technique bubble breakup was observed when measuring a 2.7 mm bubble using a 0.5 mm ID capillary tube. A discrepancy of 11% was determined when comparing the techniques in an industrial-scale mechanical flotation cell. The possible sources of bias are discussed. (C) 2003 Elsevier Ltd. All rights reserved.
Keyword Engineering, Chemical
Mineralogy
Mining & Mineral Processing
Sizing
Sampling
Flotation Bubbles
Flotation Machines
Size Distribution
2-phase
Liquid
Q-Index Code C1

 
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