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（英文）

作　　者：SUN Qian-yu YIN Wan-zhong CAO Shao-hang YANG Bin SUN Hao-ran TANG Yuan WANG Dong-hui YAO Jin 孙乾予;印万忠;曹少航;杨斌;孙浩然;唐远;王东辉;姚金(School of Environment,Tsinghua University,Beijing 100084,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;School of Zijin Mining,Fuzhou University,Fuzhou 350116,China)

机构地区：[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

出　　处：《Journal of Central South University》2019年第11期2998-3007,共10页中南大学学报（英文版）

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

摘　　要：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.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^-6mol·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.

关 键 词：BORNITE sodium butyl xanthate adsorption kinetics and thermodynamics infrared spectrum 

分 类 号：O64[理学—物理化学]