Liquid-liquid Extraction of Zinc from a Leach Residue Using D2EHPA
In this study, a hydrometallurgical treatment involving solvent extraction of zinc using D2EHPA (di-2-ethylhexyl phosphoric acid) has been investigated to recover zinc from an industrial zinc leach residue. The residue was leached with sulfuric acid producing leach liquor which was subjected to solvent extraction for enrichment of zinc and removal of impurities. Operating variables for the zinc extraction process, such as pH of the mixed solution (0.5～5.0), concentration of D2EHPA (5%～40%,w/w), temperature (25～60℃), A/O volumetric phase ratio (1/2～4/1), concentration of tri-butyl phosphate (TBP) as modifier (3%～7%, w/w), concentration of Na2SO4 in aqueous phase (0.05M,0.1M, 0.2M) were also studied. Practically all zinc was extracted from the aqueous solution at pH 2.5 with 20% w/w D2EHPA in kerosene. At this operating condition, zinc could be extracted at one theoretical stage at A/O phase ratio of 1/1, as calculated by the McCabe-Thiele method.
E. Vahidi F. Rashchi D. Moradkhani
Department of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Te Faculty of Engineering, University of Zanjan, Zanjan, Iran
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
2965-2974
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）