中国有色金属学会会刊(英文版)
中國有色金屬學會會刊(英文版)
중국유색금속학회회간(영문판)
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2003年
6期
1435-1439
,共5页
覃文庆%蓝卓越%黎维中%邱冠周
覃文慶%藍卓越%黎維中%邱冠週
담문경%람탁월%려유중%구관주
solvent extraction%zinc%stripping%D2EHPA
Selective extraction of zinc from sulfate leach solution of zinc ore was studied.D2EHPA dissolved in260# kerosene was used as extractant.The pH-extraction isotherms show the extraction order of D2EHPA for metals is Fe3+＞Zn2+＞Ca2+＞Al3+＞Mn2+＞Cu2+＞Cd2+＞Co2+＞Ni2+＞Mg2+(pH0.5).This confirms that Fe3+ ispreferentially extracted before the extraction of zinc.Extraction experiments were carried out with varying the extractant content,equilibration time,aqueous pH and phase ratio,and the solvent extraction of zinc with sodium saltof D2EHPA were also investigated.Some impurity co-extracted into the zinc loaded organic phase was efficiently removed by scrub,and the Fe3+ was hardly stripped from organic phase by sulfuric acid,hence zinc was separatedfrom Fe3+ by selective stripping.A pregnant zinc sulfate solution with low contaminants was obtained by selectivesolvent extraction.
