Application of Depletion Attraction in Mineral Flotation: I. Theory
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 flotat...
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doaj-6b6479de959944f9a002c1ff8cafb44d2020-11-25T01:32:42ZengMDPI AGMinerals2075-163X2018-10-0181045110.3390/min8100451min8100451Application of Depletion Attraction in Mineral Flotation: I. TheoryJunhyun Choi0Gahee Kim1Sowon Choi2KyuHan Kim3Yosep Han4Scott A. Bradford5Siyoung Q. Choi6Hyunjung Kim7Department of Mineral Resources and Energy Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, Jeonbuk 54896, KoreaDepartment of Mineral Resources and Energy Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, Jeonbuk 54896, KoreaDepartment of Mineral Resources and Energy Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, Jeonbuk 54896, KoreaDepartment of Chemical & Biomolecular Engineering, Seoul National University of Science & Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, KoreaDepartment of Mineral Resources and Energy Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, Jeonbuk 54896, KoreaU.S. Salinity Laboratory, USDA, ARS, Riverside, CA 92507, USADepartment of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, KoreaDepartment of Mineral Resources and Energy Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, Jeonbuk 54896, KoreaWe 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.http://www.mdpi.com/2075-163X/8/10/451flotationdepletion attractionparticle-bubble interactiondepletion agent |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Junhyun Choi Gahee Kim Sowon Choi KyuHan Kim Yosep Han Scott A. Bradford Siyoung Q. Choi Hyunjung Kim |
spellingShingle |
Junhyun Choi Gahee Kim Sowon Choi KyuHan Kim Yosep Han Scott A. Bradford Siyoung Q. Choi Hyunjung Kim Application of Depletion Attraction in Mineral Flotation: I. Theory Minerals flotation depletion attraction particle-bubble interaction depletion agent |
author_facet |
Junhyun Choi Gahee Kim Sowon Choi KyuHan Kim Yosep Han Scott A. Bradford Siyoung Q. Choi Hyunjung Kim |
author_sort |
Junhyun Choi |
title |
Application of Depletion Attraction in Mineral Flotation: I. Theory |
title_short |
Application of Depletion Attraction in Mineral Flotation: I. Theory |
title_full |
Application of Depletion Attraction in Mineral Flotation: I. Theory |
title_fullStr |
Application of Depletion Attraction in Mineral Flotation: I. Theory |
title_full_unstemmed |
Application of Depletion Attraction in Mineral Flotation: I. Theory |
title_sort |
application of depletion attraction in mineral flotation: i. theory |
publisher |
MDPI AG |
series |
Minerals |
issn |
2075-163X |
publishDate |
2018-10-01 |
description |
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. |
topic |
flotation depletion attraction particle-bubble interaction depletion agent |
url |
http://www.mdpi.com/2075-163X/8/10/451 |
work_keys_str_mv |
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1725080377199951872 |