东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (12): 1787-1791.DOI: 10.12068/j.issn.1005-3026.2014.12.026

• 资源与土木工程 • 上一篇    下一篇

矿浆中金属离子对蓝晶石矿物浮选行为的影响

张晋霞1， 冯雅丽1， 牛福生2   

  1. (1. 北京科技大学 土木与环境工程学院， 北京100083； 2. 河北联合大学 矿业工程学院， 河北 唐山063009)
  • 收稿日期:2013-08-25 修回日期:2013-08-25 出版日期:2014-12-15 发布日期:2014-09-12
  • 通讯作者: 张晋霞
  • 作者简介:张晋霞(1979-)，女，山西晋城人，北京科技大学博士研究生； 冯雅丽(1967-)，女，北京人，北京科技大学教授，博士生导师.
  • 基金资助:
    国家高技术研究发展计划项目(2012AA0624).

Influence of Metal Ions in Pulp on Floatability of Kyanite Minerals

ZHANG Jin-xia1， FENG Ya-li1， NIU Fu-sheng2   

  1. 1. School of Civil & Environmental Engineering， University of Science & Technology Beijing， Beijing 100083， China; 2. College of Mining Engineering， Hebei United University， Tangshan 063009， China.
  • Received:2013-08-25 Revised:2013-08-25 Online:2014-12-15 Published:2014-09-12
  • Contact: FENG Ya-li
  • About author:-
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摘要： 通过蓝晶石、石英及黑云母的浮选实验，研究了金属离子对矿物浮选行为的影响.实验结果表明:Ca2+和Mg2+显著活化蓝晶石的浮选，Al3+及Fe3+对蓝晶石及石英表现很强的抑制作用.浮选溶液化学分析表明，Fe3+，Al3+可以在矿物表面生成Fe(OH)3和Al(OH)3，使矿物浮选受到强烈的抑制；Ca2+和Mg2+由于羟基络合物存在使蓝晶石的零电点向低pH方向发生漂移，使十二胺的静电吸附力增强，起到活化作用.根据波耳兹曼矢量场中的粒子分布理论，通过计算Fe3+对矿物作用前后在不同pH条件下液相内部胺离子(RNH+3)浓度、界面层胺离子的浓度以及比例关系来分析金属离子的活化或抑制作用机理.

关键词: 金属离子, 蓝晶石, 石英, 黑云母, 浮选, 溶液化学

Abstract: The influences of metal ions on floatability of kyanite， quartz and biotite were studied by flotation tests. The test results showed that Ca2+ and Mg2+ have significant activation of kyanite flotation， while Al3+ and Fe3+ have strong depression of quartz and kyanite flotation. The analysis results of flotation solution chemistry showed that the flotation of kyanite and quartz are depressed intensively owing to the generation of corresponding hydroxide precipitations of A13+ and Fe3+. The electrostatic interaction is contributing to strengthen the adsorption of minerals and dodecylamine when the zeta potential of kyanite shift markedly towards negative direction in the presence of corresponding hydroxy complex of Ca2+ and Mg2+， so flotation of kyanite can be activated. According to particle distribution theory in Boltzmann vector field， activation or depression mechanism of metal ions were analyzed by calculating amine ion(RNH+3) concentration in liquid phase interior， the interface layer and their ratio under different pH value conditions before and after Fe+3 effect on minerals.

Key words: metal ions, kyanite, quartz, biotite, flotation, solution chemistry

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