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磨矿和浮选过程中黄铁矿电化学行为的研究进展

龚志辉 戴惠新 路梦雨 武立伟 赵可可

龚志辉, 戴惠新, 路梦雨, 武立伟, 赵可可. 磨矿和浮选过程中黄铁矿电化学行为的研究进展[J]. 工程科学学报, 2021, 43(1): 58-66. doi: 10.13374/j.issn2095-9389.2020.06.29.001
引用本文: 龚志辉, 戴惠新, 路梦雨, 武立伟, 赵可可. 磨矿和浮选过程中黄铁矿电化学行为的研究进展[J]. 工程科学学报, 2021, 43(1): 58-66. doi: 10.13374/j.issn2095-9389.2020.06.29.001
GONG Zhi-hui, DAI Hui-xin, LU Meng-yu, WU Li-wei, ZHAO Ke-ke. Research progress in the electrochemical behavior of pyrite during grinding and flotation[J]. Chinese Journal of Engineering, 2021, 43(1): 58-66. doi: 10.13374/j.issn2095-9389.2020.06.29.001
Citation: GONG Zhi-hui, DAI Hui-xin, LU Meng-yu, WU Li-wei, ZHAO Ke-ke. Research progress in the electrochemical behavior of pyrite during grinding and flotation[J]. Chinese Journal of Engineering, 2021, 43(1): 58-66. doi: 10.13374/j.issn2095-9389.2020.06.29.001

磨矿和浮选过程中黄铁矿电化学行为的研究进展

doi: 10.13374/j.issn2095-9389.2020.06.29.001
基金项目: 国家自然科学基金资助项目(51764023)
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    E-mail:dhx6688@sina.cn

  • 中图分类号: TD952

Research progress in the electrochemical behavior of pyrite during grinding and flotation

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  • 摘要: 综述了黄铁矿在选矿过程中有关的电化学行为及工作机理,重点讨论了黄铁矿结构特性、溶液中氧化、金属离子作用和抑制剂对黄铁矿电化学行为的影响;此外,还讨论了磨矿过程中电偶相互作用、研磨介质形状、介质材料和研磨气氛对研磨中黄铁矿电化学行为的影响。其中黄铁矿晶体结构的不同对黄铁矿表面的氧化具有较大影响,从而间接的影响黄铁矿的可浮性,半导体性质对黄铁矿的导电率具有显著的影响;同时适度的氧化有利于黄铁矿的无捕收剂浮选,而强烈的还原电位或氧化电位会抑制黄铁矿的浮选;电位的增加,对铜活化黄铁矿有不利影响,主要原因是电位增加导致活化Cu+的浓度降低,同时黄铁矿表面被铁氧化物覆盖阻碍了铜离子的吸附。抑制剂的加入可以直接参与捕收剂与黄铁矿之间的氧化还原反应,从而抑制黄铁矿的浮选;同时磨矿介质及气氛条件的不同也会影响黄铁矿电化学行为。
  • 图  1  黄铁矿空气中氧化反应路线图

    Figure  1.  Mechanisms of pyrite oxidation in air

    图  2  25 ℃下FeS2–H2O体系Eh–pH图

    Figure  2.  Eh–pH diagram for the FeS2–H2O system at 25 ℃

    图  3  有机聚合物与黄铁矿矿表面可能的相互作用机制:静电吸附(1),疏水相互作用(2),氢键(3)和化学相互作用(4)

    Figure  3.  Possible interaction mechanisms of organic polymers with pyrite surface: electrochemical attraction (1), hydrophobic interaction (2), hydrogen bonding (3), and chemical interaction (4)

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  • 收稿日期:  2020-06-29
  • 刊出日期:  2021-01-25

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