溶剂萃取分离碱性氰化液中的金  

Solvent Extraction and Separation of Gold from Alkaline Aurocyanide

作　　者：余建民[1] 李奇伟[1] 陈景[1] 

机构地区：[1]昆明贵金属研究所,昆明650221

出　　处：《应用化学》2001年第12期962-966,共5页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金 ( 2 9876 0 2 6 );云南省应用基础基金 ( 98E10 5 M)资助课题

摘　　要：研究了酰胺、仲胺、胍、季铵盐、TBP5种萃取体系对碱性氰化液中金的萃取分离 ,考察了平衡时间、水相 p H值等因素对金萃取率的影响 ,测定了金的饱和容量 ,考察了 5种萃取体系对银、铁、铜、镍氰配合物的萃取 .结果表明 ,5种体系从碱性氰化液中萃取分离金的能力大小次序为 :三烷基甲基氯化铵 ( N2 63 ) >三烷基胍 ( Lix782 5 ) >多烷基支链仲胺 ( 72 0 3) >二 -(甲基庚基 )乙酰胺 ( N50 3 ) >磷酸三丁酯 ( TBP) .这亦与萃取剂的碱性强弱次序相吻合 .萃取 Au( CN) - 2 的选择性及饱和容量次序则与之相反 .Solvent extraction of aurocyanide from alkaline cyanide solution with five extractants:amide(N 503 ), secondary amine(7203), tri-alkylguanidine(Lix7825), quaternary ammonium chloride(N 263 ) and tributyl phosphate(TBP) has been studied. The factors that could effect the extraction of the metal such as equilibrium time, aqueous pH, saturation capacity, separation factors of gold and silver(Ⅰ), ferrous(Ⅱ), copper(Ⅰ), nickel(Ⅱ), zine(Ⅱ) are discussed and determined. The order of extraction ability of the five extraction systems for aurocyanide from alkaline cyanide solution as follows: N 263 > Lix7825>7203>N 503 >TBP, same as the alkalinity order of the extractants, but in a reverse order to the selectivity and saturation capacity for aurocyanide. The above results have been proved in the case of synthetic solution in a single extraction and leach liquors of a gold concentrate in three stages contiuous extraction.

关 键 词：氰化亚金 碱性氰化液 萃取 分离 金 湿法冶金 

分 类 号：TF831[冶金工程—有色金属冶金] TF804.2