当前位置:文档之家› 新型胺类萃取剂N633萃取钨的研究

新型胺类萃取剂N633萃取钨的研究

新型胺类萃取剂N 1633萃取钨的研究①

李嘉豪1,2,曹佐英1,2,李 嘉1,2,张贵清1,2,肖连生1,2,李青刚1,2

(1.中南大学冶金与环境学院,湖南长沙410083;2.中南大学冶金分离科学与工程重点实验室,湖南长沙410083)摘 要:采用自制的胺类萃取剂N1633作萃取剂,考察了其在钨萃取冶金中的性能三当有机相组成为40%N1633+40%异辛醇+磺化煤油(体积比),在pH =8.27二相比(O /A)为1?1二振荡时间10min二萃取温度25?时,对WO 3含量116.25g /L 的钨酸钠溶液进行萃取,单级萃取率大于99%三绘制了N1633的萃取等温线,经过三级萃取饱和容量达到109.03g /L三用2.5mol /L 的氨水对负载有机相进行反萃,相比2.5?1时,反萃液中WO 3浓度达到174.31g /L三绘制了负载有机相的反萃等温线,理论上以相比1.25?1进行四级逆流萃取可将有机相中的钨基本反萃,反萃液中WO 3的饱和反萃浓度达到202.82g /L三采用0.6mol /L 的硫酸以相比2?1进行酸化再生后,N1633仍具有良好的萃取性能三

关键词:湿法冶金;胺类萃取剂;溶剂萃取;钨;萃取;反萃;饱和容量中图分类号:TF111文献标识码:A doi:10.3969/j.issn.0253-6099.2018.02.018

文章编号:0253-6099(2018)02-0074-05

Extraction of Tungsten by A New Amine Extractant N 1633

LI Jia-hao 1,2,CAO Zuo-ying 1,2,LI Jia 1,2,ZHANG Gui-qing 1,2,XIAO Lian-sheng 1,2,LI Qing-gang 1,2(1.School of Metallurgy and Environment ,Central South University ,Changsha 410083,Hunan ,China ;2.Key Laboratory of Metallurgical Separation Science and Engineering ,Central South University ,Changsha 410083,Hunan ,China )

Abstract :A self-made amine extractant N1633was taken as an extraction agent in a metallurgical test on tungsten extraction for investigating its performance.With the organic phase composed of 40%N1633+40%isooctyl alcohol +sulfonated kerosene (v /v)with O /A of 1?1,oscillation time of 10min,and extraction temperature of 25?,the sodium tungstate solution containing 116.25g /L WO 3was extracted at pH of 8.27,showing the single-stage extraction rate above 99%.An extraction isotherm of N1633was plotted.After three stages of extraction,the saturation capacity reached 109.03g /L.Then,the loaded organic phase was stripped with 2.5mol /L ammonia at O /A of 2.5?1,leading to the concentration of tungsten in stripping solution at 174.31g /L.A stripping isotherm of loaded organic phase was also plotted.It is found that most of tungsten in organic phase can be theoretically stripped at O /A of 1.25?1after a four-stage counter-current extraction,leading to the concentration of WO 3in stripping solution at 202.82g /L.And after the regeneration with 0.6mol /L H 2SO 4solution,N1633was still good in the performance.Key words :hydrometallurgy;amine extractant;solvent extraction;tungsten;extraction;stripping;saturated capacity 从钨矿浸出液中提取钨制取仲钨酸铵(APT)的主要生产工艺有离子交换和溶剂萃取[1-3]三离子交换工艺存在水耗高二用水量大以及废水处理量大且处理成

本高等问题三溶剂萃取具有流程短二酸碱耗费低二易于

实现清洁冶金生产等优势,日渐成为钨冶炼绿色清洁

生产的主导工艺三

目前,钨冶炼企业采用溶剂萃取工艺生产APT,仅限于N263[4-5]二N235[6]二N1923这几种萃取剂,品种单一,但N263或N235均存在饱和容量低二反萃液中钨酸

铵浓度较低二后续蒸发结晶过程能耗较高等问题[7]三本文以某厂碱性浸出液为料液,以自制的N1633为萃取剂,对其萃取二反萃取过程及萃取性能进行了深入研究,旨在研发出新型钨冶金萃取剂,供相关企业选用,为钨湿法冶金清洁生产服务三1 实 验1.1 实验原料及设备主要原料有:自制N1633胺类萃取剂,磺化煤油①收稿日期:2017-09-15基金项目:国家自然科学基金(51374238)

作者简介:李嘉豪(1993-),男,湖北武汉人,硕士,主要研究方向为新型分离材料的制备及分离性能的研究三通讯作者:曹佐英(1963-),男,湖南郴州人,博士,教授,主要从事稀有金属冶金二冶金分离科学与工程方面的基础理论和技术研发工作三第38卷第2期2018年04月矿 冶 工 程MINING AND METALLURGICAL ENGINEERING Vol.38?2April 2018

万方数据

相关主题
文本预览
相关文档 最新文档