黄铜矿吸附O-异丙基-N,N-二乙基硫氨酯的动力学和热力学研究  

Adsorption Kinetics and Thermodynamics of O-isopropyl-N,N-diethyl Thionocarbamate on Chalcopyrite Surfaces

作　　者：朱慧敏 包麒钰 罗紫亭 龚丛英 曹飞[1,2] 孙德四 ZHU Huimin;BAO Qiyu;LUO Ziting;GONG Congying;CAO Fei;SUN Desi(School of Chemistry and Chemical Engineering, Jiujiang University, Jiujiang 332005, Jiangxi, China;State Key Laboratory of Mineral Processing Science and Technology, Beijing 102600, China;Jiujiang University Library, Jiujiang 332005, Jiangxi, China)

机构地区：[1]九江学院化学化工学院,江西九江332005 [2]矿物加工科学与技术国家重点实验室,北京102600 [3]九江学院图书馆,江西九江332005

出　　处：《矿产保护与利用》2021年第2期23-27,共5页Conservation and Utilization of Mineral Resources

基　　金：矿物加工科学与技术国家重点实验室开放基金(BGRIMM-KJSKL-2019-06)。

摘　　要：O-异丙基-N,N-二乙基硫氨酯(XBE)是课题组研发的一种新型硫氨酯捕收剂,具有较好的铜硫浮选分离效果。为了进一步研究XBE的浮选性能,研究了搅拌时间、药剂浓度、pH值和温度等对XBE在黄铜矿表面吸附量的影响,并进行了吸附动力学和热力学分析。结果表明,pH值在7~11之间,XBE在黄铜矿表面的吸附量基本不变,搅拌25 min后XBE在黄铜矿表面达到吸附平衡,吸附过程符合二级反应动力学方程。随着药剂浓度的增加和温度的升高吸附量增大,XBE在黄铜矿表面上的吸附符合Freundlich多层吸附模型。O-isopropyl-N,N-diethyl thionocarbamate(XBE)is a new collector developed by the research group,which has good flotation separation effect for copper and sulfur.In order to further study the flotation performance of XBE,the effects of stirring time,reagent concentration,pulp pH and temperature on adsorption capacity of XBE onto chalcopyrite surfaces were studied.The adsorption kinetics and thermodynamics were investigated.The results show that adsorption capacity of XBE on chalcopyrite surfaces didn’t change basically when the pH was between 7 and 11.After stirring for 25 minutes,adsorption equilibrium of XBE on chalcopyrite surfaces was reached,and adsorption process conformed to the second-order reaction kinetic equation.The adsorption capacity of XBE on chalcopyrite surfaces increased with the increase of reagent concentration and temperature.The adsorption of XBE on chalcopyrite surfaces conformed to Freundlich multilayer adsorption model.

关 键 词：硫氨酯 黄铜矿 吸附动力学 热力学 

分 类 号：TD91[矿业工程—选矿]