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Volume 25 Issue 5
May  2018
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文章导航 >  矿物冶金与材料学报（英文）  > 2018  >  25(5): 481-488
Zhi-li Li, Feng Rao, Shao-xian Song, Yan-mei Li, and Wen-biao Liu, Slime coating of kaolinite on chalcopyrite in saline water flotation, Int. J. Miner. Metall. Mater., 25(2018), No. 5, pp. 481-488. https://doi.org/10.1007/s12613-018-1594-7
Cite this article as:
Zhi-li Li, Feng Rao, Shao-xian Song, Yan-mei Li, and Wen-biao Liu, Slime coating of kaolinite on chalcopyrite in saline water flotation, Int. J. Miner. Metall. Mater., 25(2018), No. 5, pp. 481-488. https://doi.org/10.1007/s12613-018-1594-7
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研究论文

Slime coating of kaolinite on chalcopyrite in saline water flotation

  • CONACYT Instituto de Investigación en Metalurgiay Materiales, Universidad Michoacana de San Nicolás de Hidalgo, Morelia 58030, México

  • School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China

  • Departamento de Ingeniería en Minas, Metalurgia y Geología, Universidad de Guanajuato, Guanajuato 36020, México

  • Faculty of Land and Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China

  • 通讯作者:

    Feng Rao    E-mail: fengrao@umich.mx

  • In saline water flotation, the salinity can cause a distinguishable slime coating of clay minerals on chalcopyrite particles through its effect on their electrical double layers in aqueous solutions. In this work, kaolinite was used as a representative clay mineral for studying slime coating during chalcopyrite flotation. The flotation of chalcopyrite in the presence and absence of kaolinite in tap water, seawater, and gypsum-saturated water and the stability of chalcopyrite and kaolinite particles in slurries are presented. Zeta-potential distributions and scanning electron microscopy images were used to characterize and explain the different slime coating degrees and the different flotation performances. Kaolinite particles induced slime coating on chalcopyrite surfaces and reduced chalcopyrite floatability to the greatest extent when the pH value was in the alkaline range. At 0.24wt% of kaolinite, the chalcopyrite floatability was depressed by more than 10% at alkaline pH levels in tap water. Salinity in seawater and gypsum-saturated water compressed the electrical double layers and resulted in extensive slime coating.
    • Research Article

    Slime coating of kaolinite on chalcopyrite in saline water flotation

    + Author Affiliations
      Abstract
    • In saline water flotation, the salinity can cause a distinguishable slime coating of clay minerals on chalcopyrite particles through its effect on their electrical double layers in aqueous solutions. In this work, kaolinite was used as a representative clay mineral for studying slime coating during chalcopyrite flotation. The flotation of chalcopyrite in the presence and absence of kaolinite in tap water, seawater, and gypsum-saturated water and the stability of chalcopyrite and kaolinite particles in slurries are presented. Zeta-potential distributions and scanning electron microscopy images were used to characterize and explain the different slime coating degrees and the different flotation performances. Kaolinite particles induced slime coating on chalcopyrite surfaces and reduced chalcopyrite floatability to the greatest extent when the pH value was in the alkaline range. At 0.24wt% of kaolinite, the chalcopyrite floatability was depressed by more than 10% at alkaline pH levels in tap water. Salinity in seawater and gypsum-saturated water compressed the electrical double layers and resulted in extensive slime coating.
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