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Minerals 2017, 7(7), 118; https://doi.org/10.3390/min7070118

Concentration at the Minimum Bubble Velocity (CMV) for Various Types of Flotation Frothers

1
Faculty of Geoengineering, Mining and Geology, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
2
Department of Geoscience and Petroleum, Norwegian University of Science and Technology, Sem Sælands veg 1, NO-7491 Trondheim, Norway
3
Jerzy Haber Institute of Catalysis and Surface Chemistry PAS, Niezapominajek 8, 30-239 Krakow, Poland
*
Author to whom correspondence should be addressed.
Received: 28 June 2017 / Revised: 8 July 2017 / Accepted: 10 July 2017 / Published: 12 July 2017
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Abstract

This paper presents the determination of a concentration at the minimum bubble velocity (CMV) for different types of frothers, such as straight and branched alkyl chain aliphatic alcohols, 1,ω-diols, poly(propylene glycol) and poly(ethylene glycol) alkyl ethers, n-alkyltrimethylammonium bromides, commercial frothers and others. The values of terminal rise bubble velocity were reviewed from the experimental data published in the literature for two different types of columns, i.e., a short PAS (used in Polish Academy of Sciences) of height (35 cm) and a long McGill of height (350 cm). The obtained empirical equation is universal and allows one to rapidly and accurately determine the CMV for all surfactants. The proposed empirical model can also be used to predict the terminal bubble velocity–frother concentration curve by knowing the maximum and minimum terminal velocities, as well as the values of CMV. Assessment and usefulness of frother characterization parameters (i.e., concentration at the minimum bubble velocity (CMV), dynamic frothability index (DFI) and critical coalescence concentration (CCC)) were shown in the flotation of coal. View Full-Text
Keywords: concentration at the minimum bubble velocity; frothers; flotation; bubble velocity; bubble size; critical coalescence concentration; dynamic frothability index concentration at the minimum bubble velocity; frothers; flotation; bubble velocity; bubble size; critical coalescence concentration; dynamic frothability index
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Kowalczuk, P.B.; Zawala, J.; Drzymala, J. Concentration at the Minimum Bubble Velocity (CMV) for Various Types of Flotation Frothers. Minerals 2017, 7, 118.

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