Entrainment in froth flotation: the degree of entrainment and its contributing factors

Wang, L., Peng, Y. and Runge, K. (2016) Entrainment in froth flotation: the degree of entrainment and its contributing factors. Powder Technology, 288 202-211. doi:10.1016/j.powtec.2015.10.049

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Author Wang, L.
Peng, Y.
Runge, K.
Title Entrainment in froth flotation: the degree of entrainment and its contributing factors
Journal name Powder Technology   Check publisher's open access policy
ISSN 1873-328X
Publication date 2016-01-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.powtec.2015.10.049
Open Access Status File (Author Post-print)
Volume 288
Start page 202
End page 211
Total pages 10
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Subject 1500 Chemical Engineering
Abstract In froth flotation, the degree of entrainment affects the concentrate grade and it is often assumed to be only a function of particle size in models. Literature suggests that other variables might also have a significant impact on the degree of entrainment. In this study, a factorial batch flotation experiment using a mixture of liberated chalcopyrite and two liberated gangue minerals, quartz and hematite, was performed to investigate the effects of these other variables (including impeller speed, gas flow rate, froth height and the specific gravity of gangue mineral) on the degree of entrainment. Results show that the degree of entrainment varied significantly as the flotation test conditions changed. Particle density and the interaction between gas flow rate and froth height had a statistically significant effect on the average degree of entrainment measured for the entire test. The degree of entrainment also significantly changed with flotation time throughout each experiment. It is hypothesised that these effects are a consequence of the degree of entrainment being affected by the weight of particles (not just their size) because of its effect on particle settling as well as the froth structure which provides varying resistance to particle drainage. It is concluded that models for the degree of entrainment that incorporate only particle size are not sufficient to predict gangue recovery and concentrate grade in an industrial application.
Keyword Entrainment
Degree of entrainment
Water recovery
Froth flotation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Julius Kruttschnitt Mineral Research Centre Publications
School of Chemical Engineering Publications
Official 2016 Collection
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Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 7 times in Scopus Article | Citations
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