东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (5): 716-720.DOI: 10.12068/j.issn.1005-3026.2017.05.022

• 资源与土木工程 • 上一篇    下一篇

油酸钠直接浮选孔雀石的机理研究

孙乾予， 印万忠， 曹少航， 姚金   

  1. (东北大学 资源与土木工程学院， 辽宁 沈阳110819)
  • 收稿日期:2015-12-22 修回日期:2015-12-22 出版日期:2017-05-15 发布日期:2017-05-11
  • 通讯作者: 孙乾予
  • 作者简介:孙乾予(1988-)，男，辽宁鞍山人，东北大学博士研究生; 印万忠(1970-)，男，浙江临安人，东北大学教授，博士生导师.
  • 基金资助:

    中国博士后科学基金资助项目(2015M571324); 国家自然科学基金资助项目( 51504053); 辽宁省科技厅博士科研启动基金资助项目(201501157 2015); 辽宁省教育厅科学研究一般项目(L20150180).

Mechanism Study of Direct Flotation on Malachite by Sodium Oleate

SUN Qian-yu， YIN Wan-zhong， CAO Shao-hang， YAO Jin   

  1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China.
  • Received:2015-12-22 Revised:2015-12-22 Online:2017-05-15 Published:2017-05-11
  • Contact: YIN Wan-zhong
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摘要：

研究了油酸钠直接浮选孔雀石的浮选行为及作用机理.采用浮选试验、Zeta电位测试、傅里叶红外光谱测试、溶液化学计算及热力学计算进行吸附机理分析.浮选试验表明:当捕收剂油酸钠用量为160mg/L、pH值范围 7~10时，孔雀石浮选回收率可以达到70%以上;当pH=9.5时，回收率为88.67%，达到最高;动电位及溶液化学表明:油酸钠在矿浆中的组分为C17H33COOH·C17H33COO-，C17H33COO-和(C17H33COO)2-2，油酸钠在孔雀石表面主要发生了化学吸附;根据吉布斯自由能的计算和红外光谱测试分析表明:在合适的pH值范围，油酸钠与孔雀石表面的铜离子作用生成油酸铜盐沉淀，改变了孔雀石的表面性质使它表面疏水从而容易浮选回收.

关键词: 油酸钠, 孔雀石, Zeta电位, 溶液化学计算, 傅里叶红外光谱

Abstract:

The flotation behavior and action mechanism of sodium oleate as collector for direct flotation of malachite was studied.The adsorption mechanism of sodium oleate on the surface of malachite was investigated through the adsorption measurement， Zeta potential test， Fourier transform infrared spectroscopy analysis， and solution chemistry calculation and thermodynamic calculation of solution.The results showed that the recoveries of malachite are more than 70% at pH value from 7 to 10 with sodium oleate 160mg/L， which reached the highest value 88.67% at pH=9.5. The Zeta potential measurement and solution chemical calculation indicated that sodium oleate mainly emits the chemical adsorption on the surface of malachite， the active component are C17H33COOH·C17H33COO-， C17H33COO- and (C17H33COO)2-2 in sodium oleate solution. The results of Gibbs free energy calculation and FTIR spectrum analysis confirmed that oleate ions tends to react with malachite surface to form copper oleate precipitation causing malachite’s flotability.

Key words: sodium oleate, malachite, Zeta potential, solution chemistry calculation, FTIR(Fourier trans form infrared spectroscopy)

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