有色金属科学与工程2024，Vol.15Issue(6)：848-855,8.DOI:10.13264/j.cnki.ysjskx.2024.06.008
含铜溶液中钙、锌等杂质的萃取分离工艺研究
Study on extraction and separation technology of calcium and other impurities in copper-containing solution
摘要
Abstract
At present,the solvent extraction method,which is the most widely used and highly mature purification separation method in industry,still faces problems such as low extraction rate,low separation coefficient between copper and impurities,long extraction equilibrium time,and difficulty in reverse extraction in the separation of calcium and other impurities in copper leaching solution.Therefore,this article proposed to apply a synergistic extraction system composed of tributyl phosphate(TBP,T)and(2-ethylhexyl)phosphate mono-2-ethylhexyl ester(P507,HP)to the extraction and separation of calcium and zinc in acidic solutions containing copper.The effect of factors such as extraction system composition,extraction time,extraction temperature,extraction ratio(VO/VA),and chloride ion concentration on the extraction rate of calcium and zinc was studied.The results indicated that the synergistic extraction system could selectively extract calcium and zinc simultaneously and significantly improve the extraction separation coefficient of copper and calcium and zinc compared with a single extraction agent.Under the conditions of a total concentration of 1.5 mol/L TBP-P507 in the synergistic extraction system,a TBP molar ratio of 0.4,extraction time of 5 min,extraction temperature of 30℃,VO/VA=2/1,and a total chloride ion concentration of 4 mol/L in the aqueous phase,the extraction rates of calcium and zinc were 94.69 and 85.20 while the copper extraction rate was only 2.56%.At this time,the separation coefficients of calcium copper and zinc copper were 680.47 and 219.46,respectively.The slope method research results indicated that the composition of the calcium zinc extraction complex might be{M·2[T](o)·2[P](o)}(where M represents Ca and Zn).关键词
钙锌萃取分离/TBP/P507/萃取工艺优化/萃合物组成Key words
extraction separation of calcium and zinc/TBP/P507/extraction process optimization/composition of extracted complex分类
矿业与冶金引用本文复制引用
朱山,龙淼,胡久刚,李松,胡江良..含铜溶液中钙、锌等杂质的萃取分离工艺研究[J].有色金属科学与工程,2024,15(6):848-855,8.基金项目
六盘水师范学院培育项目(LPSSY2023KJZDPY05) （LPSSY2023KJZDPY05）
六盘水市科技局项目(52020-2023-0-2-17) （52020-2023-0-2-17）
贵州省教育厅自然科学研究重点领域项目(黔教合KY字[2020]049) （黔教合KY字[2020]049）
贵州省六盘水师范学院院士工作站项目(黔科合平台人才[2019]5604号) （黔科合平台人才[2019]5604号）
贵州省煤炭洁净利用重点实验室项目(黔科合平台人才[2020]2001) （黔科合平台人才[2020]2001）
贵州省一流专业项目(GZSylzy202103) （GZSylzy202103）
贵州省高等学校煤炭产业碳中和工程研究中心(黔教技[2023]044号) （黔教技[2023]044号）
贵州省教育厅项目(黔教技[2023]087号) （黔教技[2023]087号）
