以富铌渣硫酸浸出液为原料,采用氢氟酸溶液沉淀浸出液中的钪、稀土,用TBP萃取HF-H2SO4混酸体系中的铌,使其与钛分离.实验结果表明,氢氟酸加入量为VHF∶VR=1∶4,反应沉淀时间为0.5h,钪的沉淀率大于91％、稀土沉淀率大于99％;TBP对HF-H2SO4混酸体系中的铌具有很好的萃取性能和铌、钛分离效果,得到了大于90％的氧化铌.
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