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Adsorption kinetics and thermodynamics of sodium butyl xanthate onto bornite in flotation

丁基钠黄药对斑铜矿浮选的吸附动力学和热力学研究

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Abstract

In this paper, the effect of sodium butyl xanthate (NaBX) adsorption on the surface of bornite at different pH on flotation was studied by adsorption kinetic and thermodynamic. The flotation results demonstrated that the recovery was the highest when pH was 9 in NaBX solution (4×10−5 mol/L). The adsorption kinetics showed the reaction of NaBX on the bornite conformed to the second order kinetic equation; it belonged to the multimolecular layer adsorption of Freundlich model; the maximum adsorption rate constant was 0.30 g/(10−6 mol·min), and the equilibrium adsorption capacity was 2.70×10−6 mol/g. Thermodynamic calculation results indicated that the adsorption process was spontaneous chemisorption, and the adsorption products of NaBX on bornite surface were cupric butyl xanthate, ferric butyl xanthate and dixanthogen, which were confirmed by infrared spectrum measurements.

摘要

本文通过吸附动力学和热力学研究不同pH 条件下丁基钠黄药(NaBX)在斑铜矿表面的吸附对浮选的影响. 浮选试验表明在pH 值为9 时, 斑铜矿在NaBX 溶液(4×10−5 mol/L)中的浮选效果最佳. 通过吸附动力学试验表明NaBX 在斑铜矿的吸附符合第二动力学方程, 属于多分子层的Freundlich 模型, 最大吸附速率常数为0.30 g/(10−6 mol·min), 最大平衡吸附量为2.70×10−6 mol/g. 通过热力学计算的结果表明吸附过程是自发的化学吸附过程, 并通过红外光谱分析了表面产物为黄原酸铜、黄原酸铁和双黄药.

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Authors and Affiliations

  1. School of Environment, Tsinghua University, Beijing, 100084, China

    Qian-yu Sun  (孙乾予)

  2. School of Resources and Civil Engineering, Northeastern University, Shenyang, 110819, China

    Qian-yu Sun  (孙乾予), Wan-zhong Yin  (印万忠), Shao-hang Cao  (曹少航), Bin Yang  (杨斌), Hao-ran Sun  (孙浩然), Yuan Tang  (唐远), Dong-hui Wang  (王东辉) & Jin Yao  (姚金)

  3. School of Zijin Mining, Fuzhou University, Fuzhou, 350116, China

    Wan-zhong Yin  (印万忠)

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  1. Qian-yu Sun  (孙乾予)
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Correspondence to Qian-yu Sun  (孙乾予) or Wan-zhong Yin  (印万忠).

Additional information

Foundation item: Projects(51504053, 51374079) supported by the National Natural Science Foundation of China; Project(2015M571324) supported by the Postdoctoral Science Foundation of China

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Sun, Qy., Yin, Wz., Cao, Sh. et al. Adsorption kinetics and thermodynamics of sodium butyl xanthate onto bornite in flotation. J. Cent. South Univ. 26, 2998–3007 (2019). https://doi.org/10.1007/s11771-019-4231-3

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  • DOI: https://doi.org/10.1007/s11771-019-4231-3

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