自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 26    No. 11    November 2019

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Adsorption kinetics and thermodynamics of sodium butyl xanthate onto bornite in flotation
SUN Qian-yu(孙乾予)1, 2, YIN Wan-zhong(印万忠)2, 3, CAO Shao-hang(曹少航)2, YANG Bin(杨斌)2,SUN Hao-ran(孙浩然)2, TANG Yuan(唐远)2, WANG Dong-hui(王东辉)2, YAO Jin(姚金)2

1. School of Environment, Tsinghua University, Beijing 100084, China;
2. School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China;
3. School of Zijin Mining, Fuzhou University, Fuzhou 350116, China

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.

 

Key words: bornite; sodium butyl xanthate; adsorption; kinetics and thermodynamics; infrared spectrum

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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