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Improving collecting performance of sodium oleate using a polyoxyethylene ether in scheelite flotation

聚氧乙烯醚改善油酸钠在白钨矿浮选中的捕收性能

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Abstract

In order to improve the scheelite flotation with sodium oleate (NaOL), the effect of a non-ionic polyoxyethylene ether (JFC-5) on the floatability of scheelite was investigated through flotation experiments at 10 °C, compared with 60 mg/L NaOL alone, the recovery of scheelite is improved from 22% to 85% in the presence of JFC-5 with a mass ratio of 20% at pH 10. Moreover, the resistance to Ca2+ of NaOL is increased. The adsorption mechanism was analyzed by zeta potential measurement, contact angle measurement and X-ray photoelectron spectroscopy (XPS) analysis. The results show that the adsorption of NaOL on scheelite surface is enhanced after adding JFC-5 due to the more negative zeta potentials and larger contact angles of scheelite. And the co-adsorption of NaOL and JFC-5 is confirmed by XPS analysis, so it is indicated that the adsorption of JFC-5 decreases the electrostatic repulsion between the oleate ions, resulting in the stronger adsorption of NaOL on scheelite surface. In short, the mixed NaOL/JFC-5 collector can effectively improve scheelite flotation.

摘要

为了增强油酸钠体系下白钨矿的浮选行为,通过浮选试验考察了一种非离子型聚氧乙烯醚JFC-5 对白钨矿在10 °C 时可浮性的影响。与单独使用60 mg/L 油酸钠时相比较,当pH=10,添加质量比为 20%的JFC-5 时,白钨矿的浮选回收率由22%提高到85%。此外,油酸钠的抗钙离子能力得以增强。 通过动电位测试、接触角测量和X 射线光电子能谱(XPS)考察了捕收剂在矿物表面的吸附机理,结 果显示添加JFC-5 后,白钨矿表面的动电位更负且接触角更大,表明油酸钠在白钨矿表面的吸附增强。 XPS 分析结果证实了JFC-5 和油酸钠在白钨矿表面的共吸附,从而推测JFC-5 在白钨矿表面的吸附减 弱低了油酸根离子之间的静电斥力,使得油酸钠在白钨矿表面的吸附更强。总之,油酸钠/JFC-5 组合 捕收剂可以有效改善白钨矿浮选。

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Authors and Affiliations

  1. School of Mineral Processing and Bioengineering, Central South University, Changsha, 410083, China

    Chen Chen  (陈臣), Hai-ling Zhu  (朱海玲), Wen-qing Qin  (覃文庆) & Wen-hao Jia  (贾文浩)

  2. School of Metallurgy and Environment, Central South University, Changsha, 410083, China

    Hai-ling Zhu  (朱海玲) & Li-yuan Chai  (柴立元)

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  1. Chen Chen  (陈臣)
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  2. Hai-ling Zhu  (朱海玲)
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  3. Wen-qing Qin  (覃文庆)
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Correspondence to Wen-qing Qin  (覃文庆).

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Foundation item: Project(2016RS2016) supported by Hunan Provincial Science and Technology Leader (Innovation Team of Interface Chemistry of Efficient and Clean Utilization of Complex Mineral Resources), China

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Chen, C., Zhu, Hl., Qin, Wq. et al. Improving collecting performance of sodium oleate using a polyoxyethylene ether in scheelite flotation. J. Cent. South Univ. 25, 2971–2978 (2018). https://doi.org/10.1007/s11771-018-3967-5

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  • DOI: https://doi.org/10.1007/s11771-018-3967-5

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