Application of Depletion Attraction in Mineral Flotation: I. Theory

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 146
  • Download : 27
We investigate the role of depletion interactions in the particle-bubble interactions that determine the attachment capability of particles on the bubble surface in flotation. In this article, we propose a theoretical model that explains how this attractive interaction could enhance flotation efficiency. Two optimum conditions are determined for the concentration and molecular weight of the depletion agent. The optimum concentration can be determined through the extent of surface activity of the depletion agents. The magnitude of the depletion attraction increases as the concentration increases; however, an increase in the concentration simultaneously enhances its surface concentration. The bubble surface adsorption of the depletion agent results in polymer brushes on the bubble surface that produce a large repulsive interaction. In contrast, the optimal molecular weight of the depletion agents is given by the interaction between the depletion agent sizes, which is determined by its molecular weight and Debye length which is determined by the solution ionic strength. We demonstrate that exploiting this depletion interaction could significantly enhance the flotation efficiency and in principal could be used for any particle system.
Publisher
MDPI
Issue Date
2018-10
Language
English
Article Type
Article
Citation

MINERALS, v.8, no.10

ISSN
2075-163X
DOI
10.3390/min8100451
URI
http://hdl.handle.net/10203/246909
Appears in Collection
CBE-Journal Papers(저널논문)
Files in This Item
106877.pdf(10.69 MB)Download

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0