用P204从浮选铅尾矿硫酸浸出净化液中萃取锌及制备ZnSO_(4)·7H_(2)O的工艺研究  

Preparation of ZnSO_(4)7H_(2)O by Extracting Zinc from Purified Solution of Sulphuric Acid Leaching from Flotation Lead Tailings with P204

作　　者：郭拴全 康敏 郭梅 宁新霞 GUO Shuanquan;KANG Min;GUO Mei;NING Xinxia(Xi′an Northwest Nonferrous Geological Research Institute Co.,Ltd.,Xi′an 710054,China;Shaanxi Engineering and Technology Research Center for Comprehensive Utilization of Mineral Resources,Xi′an 710054,China)

机构地区：[1]西安西北有色地质研究院有限公司,陕西西安710054 [2]陕西省矿产资源综合利用工程技术研究中心,陕西西安710054

出　　处：《湿法冶金》2025年第1期111-117,共7页Hydrometallurgy of China

摘　　要：研究了采用P204(二(2-乙基己基)磷酸酯)从浮选铅尾矿硫酸浸出净化液中萃取锌,优化了萃取和反萃取工艺条件,并通过富锌液蒸发结晶制备了ZnSO_(4)·7H_(2)O。结果表明:在有机相组成为50%P204+50%磺化煤油、P204皂化度65%、萃原液pH=3.5、相比V_(A)/V_(O)=1/1、萃取时间10 min和萃取级数为二级条件下,锌萃取率可达99.11%;萃取所得饱和有机相在反萃剂(H_(2)SO_(4))浓度7%、反萃相比V_(O)/V_(A)=2/1、反萃取时间10 min和反萃取级数为三级条件下,锌反萃率可达99.32%。制备的ZnSO_(4)·7H_(2)O满足HG/T 2326—2015要求,其微观形貌以颗粒状和层状结构均匀分布。The extraction of zinc by P204(Di-(2-ethylhexyl)phosphate)from sulfuric acid leaching purification liquid of flotation lead tailings was studied.The extraction and stripping conditions were optimized.ZnSO_(4)7H_(2)O was prepared by evaporation and crystallization of zinc-rich liquid.The results show that under the conditions of organic phase composition of 50%P204+50%sulfonated kerosene,saponification degree of P204 of 65%,extract pH of 3.5,extraction phase ratio V_(A)/V_(O)=1/1,extraction time of 10 min and two stages of extraction,the extraction rate of zinc can reach 99.11%.Under the conditions of H_(2)SO_(4)concentration of 7%,stripping phase ratio V_(O)/V_(A)=2/1,stripping time of 10 min and three stages of stripping,the stripping rate of zinc can reach 99.32%.The prepared ZnSO_(4)7H_(2)O Can meet the requirements of HG/T 2326—2015,and its microstructure is uniformly distributed in granular and layered structures.

关 键 词：浮选铅尾矿 萃取 P204 七水硫酸锌 硫酸浸出 锌 

分 类 号：TF813[冶金工程—有色金属冶金] TF804.2[理学—物理化学] O647.3[理学—化学]