用磷酸三丁酯从硝酸体系中萃取分离锆铪试验研究  

Separation of Zirconium and Hafnium From Nitric Acid Solution by Solvent Extraction Using Tributyl Phosphate

作　　者：李大炳[1] 赵凤岐[1] 支梅峰 周志全[1] 张永明[1] 舒祖骏[1] 

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》2016年第6期507-512,共6页Hydrometallurgy of China

摘　　要：以含铪的氯化锆酰工业产品为原料，经水溶、碱沉、洗涤、硝酸溶解等工序制备p（Zr（Hf））为75-80g／L的硝酸锆（铪）酰溶液；再以φ（TBP）=40％的煤油溶液萃取锆，含锆有机相经硝酸锆酰溶液洗涤除铪、水反萃取后，得到硝酸锆酰溶液；硝酸锆酰溶液经氨水沉淀，沉淀物经干燥、煅烧得到ZrO2粉末，其ZrO2纯度达99．5％，铪质量分数〈1．0×10^-5，产品质量优于原子能级二氧化锆标准（铪质量分数〈1．0×10^-4）；萃取锆后的萃余水相中，铪占锆、铪总质量的96．7％，满足原子能级铪对杂质锆的要求。The zirconium oxychloride which contains hafnium was used as raw materials to produce zirconium oxynitrate by water dissolution, alkali precipitation, washing and dissolving in nitric acid. Then zirconium was extracted using 40%TBP＋60%kerosene from the zirconium oxynitrate solution. The results show that the nuclear-grade ZrO2 can be obtained after counter-current extraction, washing organic phase, re-extraction, precipitation, drying and calcinating, the purity of ZrO2 is 99. 5%, the content of hafnium is less than 1.0 × 10^-5. The product is much better than the standard nuclear-grade ZrO2. The mass ratio of Hf to Zr in raffinate is 96.7%, which can be used to prepare nuclear-grade hafnium.

关 键 词：锆 铪 分离 TBP 溶剂萃取 

分 类 号：TF841.4[冶金工程—有色金属冶金]