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Volume 26 Issue 1
Jan.  2019
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文章导航 >  矿物冶金与材料学报（英文）  > 2019  >  26(1): 1-10
Ji-wei Lu, Zhi-tao Yuan, Xiao-fei Guo, Zhong-yun Tong, and Li-xia Li, Magnetic separation of pentlandite from serpentine by selective magnetic coating, Int. J. Miner. Metall. Mater., 26(2019), No. 1, pp. 1-10. https://doi.org/10.1007/s12613-019-1704-1
Cite this article as:
Ji-wei Lu, Zhi-tao Yuan, Xiao-fei Guo, Zhong-yun Tong, and Li-xia Li, Magnetic separation of pentlandite from serpentine by selective magnetic coating, Int. J. Miner. Metall. Mater., 26(2019), No. 1, pp. 1-10. https://doi.org/10.1007/s12613-019-1704-1
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研究论文

Magnetic separation of pentlandite from serpentine by selective magnetic coating

  • School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China

  • School of Mining Engineering, University of Science and Technology Liaoning, Anshan 114051, China

  • Shaanxi Key Laboratory for the Comprehensive Utilization of Tailings Resources, Shangluo University, Shangluo 726000, China

  • 通讯作者:

    Zhi-tao Yuan    E-mail: yuanzhitao@mail.neu.edu.cn

    Xiao-fei Guo    E-mail: gxf0957@126.com

  • In this study, pentlandite was selectively separated from serpentine using magnetic coating technology by adjusting and optimizing pH, stirring speeds, magnetic field intensities, and dosages of sodium hexametaphosphate (SHMP) and sodium oleate (SO). A magnetic concentrate with Ni grade of 20.8% and Ni recovery of 80.5% was attained under the optimized operating conditions. Considering the above, the adsorption behaviors of SHMP and SO and the surface properties of minerals after the magnetic coating were studied by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results show that magnetite was preferentially coated on the pentlandite surfaces and sparingly coated on the serpentine surfaces in the presence of SHMP and SO. Furthermore, calculations by Derjaguin-Landau-Verwey-Overbeek (DLVO) theory indicate that the preferential adsorption of magnetite on the pentlandite surfaces is due to the presence of a hydrophobic interaction between the magnetite and pentlandite, which is much stronger than the interaction between magnetite and serpentine.
    • Research Article

    Magnetic separation of pentlandite from serpentine by selective magnetic coating

    + Author Affiliations
      Abstract
    • In this study, pentlandite was selectively separated from serpentine using magnetic coating technology by adjusting and optimizing pH, stirring speeds, magnetic field intensities, and dosages of sodium hexametaphosphate (SHMP) and sodium oleate (SO). A magnetic concentrate with Ni grade of 20.8% and Ni recovery of 80.5% was attained under the optimized operating conditions. Considering the above, the adsorption behaviors of SHMP and SO and the surface properties of minerals after the magnetic coating were studied by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results show that magnetite was preferentially coated on the pentlandite surfaces and sparingly coated on the serpentine surfaces in the presence of SHMP and SO. Furthermore, calculations by Derjaguin-Landau-Verwey-Overbeek (DLVO) theory indicate that the preferential adsorption of magnetite on the pentlandite surfaces is due to the presence of a hydrophobic interaction between the magnetite and pentlandite, which is much stronger than the interaction between magnetite and serpentine.
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