The hydrodynamics of an operating flash flotation cell

Newcombe, Bianca, Bradshaw, Dee J. and Wightman, Elaine M. (2013) The hydrodynamics of an operating flash flotation cell. Minerals Engineering, 41 86-96. doi:10.1016/j.mineng.2012.11.007


Author Newcombe, Bianca
Bradshaw, Dee J.
Wightman, Elaine M.
Title The hydrodynamics of an operating flash flotation cell
Journal name Minerals Engineering   Check publisher's open access policy
ISSN 0892-6875
1872-9444
Publication date 2013-02
Year available 2012
Sub-type Article (original research)
DOI 10.1016/j.mineng.2012.11.007
Volume 41
Start page 86
End page 96
Total pages 11
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Collection year 2013
Language eng
Formatted abstract
Key parameters for evaluating the hydrodynamic conditions within an operating flash flotation cell have been investigated. Profiles of the slurry at increasing depth within the cell have shown a strong trend of increasing slurry density (per cent solids) and coarseness (P80), with a clear indication of segregation on the basis of particle specific gravity. Results of local gas dispersion measurements, taken with the Anglo-Platinum Bubble Sizer, show that bubble coalescence is occurring at shallower depths within the cell and there is a clear trend of decreasing gas velocity (Jg) with increasing depth at the axial location of measurement. Due to access restrictions gas dispersion measurements were taken close to the cell wall, but all data obtained falls well below the recommended minimum values for mechanically driven conventional flotation cells. However, the flash flotation environment is significantly different to a conventional cell, with higher per cent solids and a significantly coarser feed material, making this comparison qualitative (as unfortunately within the literature, there exists no other flash flotation data sets of this nature on which to base a comparison). The residence time distribution of solids indicates a significant amount of short-circuiting and/or internal recycle within the cell. Yet despite these findings, this cell contributes up to half of the pyrite recovery to the final concentrate at a very high grade.
Keyword Sulphide ores
Froth flotation
Flotation machines
Particle size
Classification
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 12 December 2012

Document type: Journal Article
Sub-type: Article (original research)
Collections: Julius Kruttschnitt Mineral Research Centre Publications
Official 2013 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 5 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 7 times in Scopus Article | Citations
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Created: Tue, 05 Feb 2013, 16:02:44 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre