| Cu（II）、Ni（II）离子在蛇纹石表面的吸附及对其浮选的影响 |
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| 引用本文： | 曹永丹,曹钊,张亚辉,孙传尧,张金山.Cu（II）、Ni（II）离子在蛇纹石表面的吸附及对其浮选的影响[J].北京科技大学学报,2016(4):461-467. |
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| 作者姓名： | 曹永丹 曹钊 张亚辉 孙传尧 张金山 |
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| 作者单位： | 1. 内蒙古科技大学矿业研究院,包头,014010;2. 内蒙古科技大学矿业研究院，包头014010; 东北大学资源与土木工程学院，沈阳110819;3. 东北大学资源与土木工程学院,沈阳,110819;4. 北京矿冶研究总院,北京,100044 |
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| 基金项目： | 国家自然科学基金资助项目(51174154);内蒙古自然科学基金资助项目(2014MS0521) |
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| 摘 要： | 通过吸附量测试、纯矿物浮选和红外光谱分析,研究Cu2+和Ni2+离子在蛇纹石表面的吸附过程及对蛇纹石浮选的活化机理。 Cu2+和Ni2+离子在蛇纹石表面的吸附符合二级动力学模型,等温吸附过程符合Langmuir等温吸附模型,吸附能够自发进行,为物理吸附和化学吸附的共同作用,Cu2+和Ni2+离子在蛇纹石表面的吸附量随pН值升高而增大。 Cu2+和Ni2+离子在弱碱性条件下对蛇纹石具有活化作用,活化机理为铜镍的氢氧化物沉淀和羟基络合物作用于蛇纹石表面,形成活性位点,黄药在活性位点上吸附生成黄原酸铜或黄原酸镍,从而使蛇纹石表面疏水性增大,浮选受到活化。
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| 关 键 词： | 浮选 蛇纹石 铜 镍 吸附 活化 机理 |
Effect of Cu(II) and Ni(II) adsorption on serpentine flotation |
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| CAO Yong-dan,CAO Zhao,ZHANG Ya-hui,SUN Chuan-yao,ZHANG Jin-shan.Effect of Cu(II) and Ni(II) adsorption on serpentine flotation[J].Journal of University of Science and Technology Beijing,2016(4):461-467. |
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| Authors: | CAO Yong-dan CAO Zhao ZHANG Ya-hui SUN Chuan-yao ZHANG Jin-shan |
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| Institution: | CAO Yong-dan;CAO Zhao;ZHANG Ya-hui;SUN Chuan-yao;ZHANG Jin-shan;Institute of Mining Engineering,Inner Mongolia University of Science and Technology;College of Resources and Civil Engineering,Northeastern University;Beijing General Research Institute of Mining and Metallurgy; |
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| Abstract: | The adsorption and activation mechanisms of Cu2+ and Ni2+ ions on serpentine were investigated through adsorption measurements, pure mineral flotation tests and IR spectra analyses. It is found that the adsorption of Cu2+ and Ni2+ ions on serpentine agrees with the second order kinetics model, and the isothermal adsorption process correlates well with the Langmuir isotherm model. The adsorption is a spontaneous process, which is caused jointly by physical and chemical functions. The adsorption amount of Cu2+and Ni2+ ions on serpentine increases with increasing pН values. Under a weak alkaline condition, serpentine can be activated by Cu2+ and Ni2+ ions. The active sites can be formed on the surface of serpentine after being reacted with hydroxide and hydroxy com-plexes of copper and nickel, on which xanthates can be adsorbed to generate copper and nickel xanthates. These hydrophobic products improve the surface hydrophobicity of serpentine and thus activate its flotation. |
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| Keywords: | flotation serpentine copper nickel adsorption activation mechanisms |
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