Air bubble and oil droplet interactions in centrifugal fields during air-sparged hydrocyclone flotation

Niewiadomski, M., Nguyen, A. V., Hupka, J., Nalaskowski, J. and Miller, J. D. (2007) Air bubble and oil droplet interactions in centrifugal fields during air-sparged hydrocyclone flotation. International Journal of Environment and Pollution, 30 2: 313-331.


Author Niewiadomski, M.
Nguyen, A. V.
Hupka, J.
Nalaskowski, J.
Miller, J. D.
Title Air bubble and oil droplet interactions in centrifugal fields during air-sparged hydrocyclone flotation
Journal name International Journal of Environment and Pollution   Check publisher's open access policy
ISSN 0957-4352
Publication date 2007
Year available 2007
Sub-type Article (original research)
DOI 10.1504/IJEP.2007.014707
Volume 30
Issue 2
Start page 313
End page 331
Total pages 19
Editor Dorgham, M. A.
Place of publication United Kingdom
Publisher Inderscience Publishers
Collection year 2008
Language eng
Subject 290702 Mineral Processing
640304 Concentrating processes of other base metal ores
C1
Abstract The interactions of air bubbles and oil droplets in centrifugal flotation have been considered with respect to process conditions present during Air-sparged Hydrocyclone (ASH) flotation. Encounter efficiency of oil droplets with air bubbles has been found to be significantly smaller when compared to encounter efficiency of mineral particles. Collision and sliding contact times have been determined. Collision has been found to be insufficient for successful contact between oil droplets and air bubbles while sliding allows for film rupture depending on specific system conditions. Although the tenacity of oil droplet attachment to an air bubble is believed to be greater than the tenacity of a mineral particle, emulsification makes oil flotation in centrifugal devices with large dissipation of energy inefficient and hence requires the use of high molecular weight polymeric flocculants.
Keyword Environmental Sciences
centrifugal flotation
froth flotation
oil flotation
dispersed oil,air-sparged
hydrocyclone
ASH
Particle
Stability
Time
Mechanisms
Antifoams
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Tue, 15 Apr 2008, 11:35:08 EST by Gail Smith on behalf of Mining and Minerals Process Engineering