东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (7): 1013-1016.DOI: 10.12068/j.issn.1005-3026.2016.07.022

• 资源与土木工程 • 上一篇    下一篇

金属离子对辉钼矿浮选的影响及机理研究

袁致涛1, 张其东1,2, 刘炯天1,3   

  1. (1. 东北大学 资源与土木工程学院, 辽宁 沈阳110819; 2. 北京有色金属研究总院 生物冶金国家工程实验室, 北京100088; 3. 郑州大学 化学与能源学院, 河南 郑州450001)
  • 收稿日期:2015-06-10 修回日期:2015-06-10 出版日期:2016-07-15 发布日期:2016-07-13
  • 通讯作者: 袁致涛
  • 作者简介:袁致涛(1971-),男,湖北大冶人,东北大学教授; 刘炯天(1963-),男,河南南阳人,郑州大学教授,博士生导师,中国工程院院士.
  • 基金资助:
    国家自然科学基金青年基金资助项目(51104034); 中央高校基本科研业务费专项资金资助项目(N130601003).

Influence and Mechanism of Metal Ions on Flotation of Molybdenite

YUAN Zhi-tao1, ZHANG Qi-dong1,2, LIU Jiong-tian1,3   

  1. 1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China; 2. National Engineering Laboratory of Biohydrometallurgy, General Research Institute for Nonferrous Metals, Beijing 100088, China; 3. School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China.
  • Received:2015-06-10 Revised:2015-06-10 Online:2016-07-15 Published:2016-07-13
  • Contact: ZHANG Qi-dong
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摘要: 通过对辉钼矿纯矿物的浮选实验和动电位的测试,研究了金属离子对辉钼矿浮选的影响及作用机理.研究结果表明,Ca2+,Cu2+,Pb2+,Fe3+均可在辉钼矿表面形成吸附,但Ca2+对辉钼矿的浮选结果没有明显影响,只有Cu2+,Pb2+和Fe3+对辉钼矿的浮选产生了抑制作用.通过溶液化学计算发现,在一定的pH值范围内,Cu2+,Pb2+和Fe3+形成的氢氧化物沉淀会特定地吸附于辉钼矿的极性和非极性表面,产生异相凝聚,导致辉钼矿表面亲水,可浮性下降.

关键词: 辉钼矿, 金属离子, 浮选, 抑制, 吸附

Abstract: The influences and mechanism of metal ions on the flotation of molybdenite were investigated by flotation experiments and measurements of zeta potential with single molybdenite. The results show that Ca2+, Cu2+, Pb2+and Fe3+can adsorb on the surface of molybdenite. Ions like Cu2+, Pb2+and Fe3+ can depress flotation of molybdenite while Ca2+ shows no significant influence. Solution chemistry calculations confirm that the hydrophobic surfaces of molybdenite become hydrophilic and molybdenite flotation is depressed within certain pH range due to hetero-coagulation of the metal hydroxides of Cu2+, Pb2+and Fe3+on both the polar and nonpolar surfaces of molybdenite.

Key words: molybdenite, metal ions, flotation, depression, adsorption

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