Effect of kerosene emulsion in MgCl2 solution on the kinetics of bubble interactions with molybdenite and chalcopyrite

Gde Pandhe Wisnu Suyantara, Tsuyoshi Hirajima, Ahmed Mohamed Elmahdy, Hajime Miki, Keiko Sasaki

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The formation of stable bubble-particle aggregates is essential to the froth flotation process. To form such aggregates, bubbles and particles must collide, the intervening liquid film must be drained below its critical rupture thickness, and three-phase contact (TPC) formation must occur. A good understanding of the interaction mechanism between bubbles and particles during collision and attachment is important. We herein investigated the effects of emulsified kerosene in a 0.01 M MgCl2 solution (a model seawater component) on bubble interactions with pure molybdenite (MoS2) and chalcopyrite (CuFeS2) surfaces. In 0.01 M MgCl2 at pH 6 and 11, kerosene retarded the bubble surface mobility and reduced the bubble rise velocity. In the presence of kerosene at pH 6, the TPC formed more rapidly on both mineral surfaces. This was due to the increase in surface hydrophobicity caused by kerosene. In addition, TPC formation was more rapid on the molybdenite surface than on the chalcopyrite surface due to the effect of the adsorbed kerosene and the low surface homogeneity of molybdenite. Finally, floatability tests demonstrated that the separation of molybdenite and chalcopyrite should be possible by adding emulsified kerosene in a 0.01 M MgCl2 solution at pH 9.

Original languageEnglish
Pages (from-to)98-113
Number of pages16
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume501
DOIs
Publication statusPublished - Jul 20 2016

Fingerprint

kerosene
Magnesium Chloride
Kerosene
Emulsions
Bubbles (in fluids)
emulsions
bubbles
Kinetics
kinetics
interactions
Froth flotation
flotation
particle collisions
Liquid films
Hydrophobicity
hydrophobicity
chalcopyrite
Seawater
homogeneity
attachment

All Science Journal Classification (ASJC) codes

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Effect of kerosene emulsion in MgCl2 solution on the kinetics of bubble interactions with molybdenite and chalcopyrite. / Suyantara, Gde Pandhe Wisnu; Hirajima, Tsuyoshi; Elmahdy, Ahmed Mohamed; Miki, Hajime; Sasaki, Keiko.

In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 501, 20.07.2016, p. 98-113.

Research output: Contribution to journalArticle

@article{3ab30e23ffab4d3387867dbc092c00e4,
title = "Effect of kerosene emulsion in MgCl2 solution on the kinetics of bubble interactions with molybdenite and chalcopyrite",
abstract = "The formation of stable bubble-particle aggregates is essential to the froth flotation process. To form such aggregates, bubbles and particles must collide, the intervening liquid film must be drained below its critical rupture thickness, and three-phase contact (TPC) formation must occur. A good understanding of the interaction mechanism between bubbles and particles during collision and attachment is important. We herein investigated the effects of emulsified kerosene in a 0.01 M MgCl2 solution (a model seawater component) on bubble interactions with pure molybdenite (MoS2) and chalcopyrite (CuFeS2) surfaces. In 0.01 M MgCl2 at pH 6 and 11, kerosene retarded the bubble surface mobility and reduced the bubble rise velocity. In the presence of kerosene at pH 6, the TPC formed more rapidly on both mineral surfaces. This was due to the increase in surface hydrophobicity caused by kerosene. In addition, TPC formation was more rapid on the molybdenite surface than on the chalcopyrite surface due to the effect of the adsorbed kerosene and the low surface homogeneity of molybdenite. Finally, floatability tests demonstrated that the separation of molybdenite and chalcopyrite should be possible by adding emulsified kerosene in a 0.01 M MgCl2 solution at pH 9.",
author = "Suyantara, {Gde Pandhe Wisnu} and Tsuyoshi Hirajima and Elmahdy, {Ahmed Mohamed} and Hajime Miki and Keiko Sasaki",
year = "2016",
month = "7",
day = "20",
doi = "10.1016/j.colsurfa.2016.04.039",
language = "English",
volume = "501",
pages = "98--113",
journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",
issn = "0927-7757",
publisher = "Elsevier",

}

TY - JOUR

T1 - Effect of kerosene emulsion in MgCl2 solution on the kinetics of bubble interactions with molybdenite and chalcopyrite

AU - Suyantara, Gde Pandhe Wisnu

AU - Hirajima, Tsuyoshi

AU - Elmahdy, Ahmed Mohamed

AU - Miki, Hajime

AU - Sasaki, Keiko

PY - 2016/7/20

Y1 - 2016/7/20

N2 - The formation of stable bubble-particle aggregates is essential to the froth flotation process. To form such aggregates, bubbles and particles must collide, the intervening liquid film must be drained below its critical rupture thickness, and three-phase contact (TPC) formation must occur. A good understanding of the interaction mechanism between bubbles and particles during collision and attachment is important. We herein investigated the effects of emulsified kerosene in a 0.01 M MgCl2 solution (a model seawater component) on bubble interactions with pure molybdenite (MoS2) and chalcopyrite (CuFeS2) surfaces. In 0.01 M MgCl2 at pH 6 and 11, kerosene retarded the bubble surface mobility and reduced the bubble rise velocity. In the presence of kerosene at pH 6, the TPC formed more rapidly on both mineral surfaces. This was due to the increase in surface hydrophobicity caused by kerosene. In addition, TPC formation was more rapid on the molybdenite surface than on the chalcopyrite surface due to the effect of the adsorbed kerosene and the low surface homogeneity of molybdenite. Finally, floatability tests demonstrated that the separation of molybdenite and chalcopyrite should be possible by adding emulsified kerosene in a 0.01 M MgCl2 solution at pH 9.

AB - The formation of stable bubble-particle aggregates is essential to the froth flotation process. To form such aggregates, bubbles and particles must collide, the intervening liquid film must be drained below its critical rupture thickness, and three-phase contact (TPC) formation must occur. A good understanding of the interaction mechanism between bubbles and particles during collision and attachment is important. We herein investigated the effects of emulsified kerosene in a 0.01 M MgCl2 solution (a model seawater component) on bubble interactions with pure molybdenite (MoS2) and chalcopyrite (CuFeS2) surfaces. In 0.01 M MgCl2 at pH 6 and 11, kerosene retarded the bubble surface mobility and reduced the bubble rise velocity. In the presence of kerosene at pH 6, the TPC formed more rapidly on both mineral surfaces. This was due to the increase in surface hydrophobicity caused by kerosene. In addition, TPC formation was more rapid on the molybdenite surface than on the chalcopyrite surface due to the effect of the adsorbed kerosene and the low surface homogeneity of molybdenite. Finally, floatability tests demonstrated that the separation of molybdenite and chalcopyrite should be possible by adding emulsified kerosene in a 0.01 M MgCl2 solution at pH 9.

UR - http://www.scopus.com/inward/record.url?scp=84966703847&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84966703847&partnerID=8YFLogxK

U2 - 10.1016/j.colsurfa.2016.04.039

DO - 10.1016/j.colsurfa.2016.04.039

M3 - Article

AN - SCOPUS:84966703847

VL - 501

SP - 98

EP - 113

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

SN - 0927-7757

ER -