Effect of kerosene on bubble interaction with molybdenite and chalcopyrite in MgCl2 solution

Gde Pandhe Wisnu Suyantara, Tsuyoshi Hirajima, A. M. Elmahdy, Hajime Miki, Keiko Sasaki

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

Seawater has been reported to depress molybdenite in a copper-molybdenum (Cu-Mo) flotation process at high pH due to the precipitation of Mg(OH)2. Meanwhile, to improve mineral recoveries, collectors are usually added into the flotation cells, thus adding the complexity to the mechanism of bubble-particle interactions involved in Cu-Mo flotation. Therefore, understanding the interaction mechanism in seawater flotation and in the presence of collectors is important to explain the minerals depression. The present work investigated the effect of kerosene on the bubble collision and attachment to pure chalcopyrite and molybdenite surfaces in MgCl2 solution as one of the seawater major components at pH 6 and 11. Mineral surfaces were characterized using atomic force microscopy (AFM). In addition, minerals floatability in the same system were tested in a column flotation. The study of bubble-particle interactions shows that following several collisions, bubble could displace the intervening liquid layer on the mineral surfaces, forming a three-phase contact (TPC). A TPC formed more rapidly in the presence of emulsified kerosene in a 0.01 M MgCl2 solution at pH 6 for both minerals. The reason is kerosene increased the surfaces hydrophobicity and destabilized the intervening liquid layer on the surfaces. Moreover, the average time required to form a TPC was shorter on molybdenite surface. This can be attributed to the effect of adsorbed kerosene on molybdenite surface and molybdenite surface roughness.

本文言語英語
ホスト出版物のタイトルIMPC 2016 - 28th International Mineral Processing Congress
出版社Canadian Institute of Mining, Metallurgy and Petroleum
ISBN(電子版)9781926872292
出版ステータス出版済み - 2016
イベント28th International Mineral Processing Congress, IMPC 2016 - Quebec City, カナダ
継続期間: 9 11 20169 15 2016

出版物シリーズ

名前IMPC 2016 - 28th International Mineral Processing Congress
2016-September

その他

その他28th International Mineral Processing Congress, IMPC 2016
Countryカナダ
CityQuebec City
Period9/11/169/15/16

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology
  • Mechanical Engineering
  • Earth-Surface Processes

フィンガープリント 「Effect of kerosene on bubble interaction with molybdenite and chalcopyrite in MgCl<sub>2</sub> solution」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル