东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2009, Vol. 30 ›› Issue (10): 1493-1496.DOI: -

• 论著 • 上一篇    下一篇

氧化亚铁硫杆菌抑制黄铁矿可浮性作用机理

梁海军;魏德洲;   

  1. 东北大学材料与冶金学院;东北大学资源与土木工程学院;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2009-10-15 发布日期:2013-06-22
  • 通讯作者: Liang, H.-J.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50174014)

Suppression mechanism of Thiobacillus ferrooxidans as biosorbate for reducing floatability of pyrite

Liang, Hai-Jun (1); Wei, De-Zhou (2)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China; (2) School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2009-10-15 Published:2013-06-22
  • Contact: Liang, H.-J.
  • About author:-
  • Supported by:
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摘要： 通过对氧化亚铁硫杆菌吸附前后黄铁矿Zeta电位和表面接触角的测定,研究了其表面电性和润湿性变化,探讨了氧化亚铁硫杆菌抑制黄铁矿可浮性的作用机理.结果表明,氧化亚铁硫杆菌作用后,黄铁矿的表面电性发生明显变化,等电点pH值降低,表面润湿性变化不明显;氧化亚铁硫杆菌吸附对黄铁矿可浮性的抑制作用不是来源于增强黄铁矿表面的亲水性,而是由于减少了浮选捕收剂在黄铁矿表面的吸附,静电作用和空间位阻效应是导致黄铁矿可浮性受到抑制的重要原因.

关键词: 氧化亚铁硫杆菌, 黄铁矿, Zeta电位, 润湿性

Abstract: Zeta potential and surface contact angle of pyrite were measured before and after adsorbing Thiobacillus ferrooxidans onto pyrite surface to examine its change in electrical properties and wettability, and the suppression mechanism of Thiobacillus ferrooxidans as biosorbate for reducing the floatability of pyrite during froth floatation was discussed. The results showed that after interacting with Thiobacillus ferrooxidans the surface electrical properties of pyrite change obviously to result in the reduction of pH value at iso-electric point, but its surface wettability varies slightly. The suppression effect of Thiobacillus ferrooxidans as biosorbate onto pyrite surface does not result from increasing its surface hydrophilicity but from weakening the attachment of collector to pyrite particles during froth floatation. Electrostatic interaction and steric hindrance are the main causes of the suppression of pyrite floatability.

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