高浓度硫酸体系中铀与铁的HDEHP萃取分离  

Separating of Uranium and Iron From High Cocentration Sulfuric Acid Solution by Solvent Extraction Using HDEHP as Extractant

作　　者：周志全[1] 赵凤岐[1] 舒祖骏[1] 张永明[1] 支梅峰 邓慧东[1] 任燕[1] ZHOU Zhiquan;ZHAO Fengqi;SHU Zujun;ZHANG Yongming;ZHI Meifeng;DENG Huidong;REN Yan(Beijing Research Institute of Chemical Engineering and Metallurgy,CNNC, Beijing 101149,China)

机构地区：[1]核工业北京化工冶金研究院,北京101149

出　　处：《湿法冶金》2018年第6期468-473,共6页Hydrometallurgy of China

摘　　要：研究了采用HDEHP萃取—碳酸钠三相分离反萃取技术从高浓度硫酸体系中分离铀与铁,考察了铁萃取量、铁沉淀物粒度控制方法,铁沉淀物的收集及排放方法,并对试验所得沉淀物进行了表征,同时进行了萃取与反萃取台架验证试验。结果表明:采用HDEHP萃取—碳酸钠三相分离反萃取技术可以从高浓度硫酸体系中分离铀与铁;铁萃取率为1.05%,反萃取液中铀质量浓度为32.61/L、铁质量浓度为0.279g/L,反萃取后贫有机相中铀质量浓度为0.01g/L;反萃取过程中,三相分离效果较好,所得沉淀物为非晶态铁(氢)氧化物,沉降过滤性能良好。The separation of uranium and iron from high concentration sulfuric acid solution was researched by the process of solvent extraction using HDEHP as extractant and three phases stripping using Na 2 CO 3 solution.The control methods for iron extraction and precipitation particle size,iron precipitate collection and discharge methods were examined.And the precipitate was characterized,a bench test was carried on.The results show that by the process,uranium in high concentrate sulfuric acid solution can be separated from iron.The extraction rate of iron is only 1.05%.In the stripped solution,the concentration of uranium and iron are 32.61/L and 0.279 g/L,respectively.The uranium concentration in barren organic phase is 0.01 g/L.During stripping process,the three phases are well separated.The precipitate is amorphous iron oxide or iron hydroxide which has good subsidence and filtration performance.

关 键 词：硫酸体系 溶剂萃取 铀 铁 分离 沉淀 

分 类 号：TL212.3[核科学技术—核燃料循环与材料] TF804.2[冶金工程—有色金属冶金]