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投稿时间：2013-04-17 修订日期：2013-04-17 录用日期：2013-04-18 网络发布日期：2013-09-29
投稿时间：2013-04-17 修订日期：2013-04-17 录用日期：2013-04-18 网络发布日期：2013-09-29
中文摘要: 开发了一种复杂稀有金属矿“直接还原—酸化浸出—沉淀煅烧”回收稀土、铌、钽和铁的新工艺。结果表明，添加质量分数35%碱性添加剂在1 050 ℃还原120 min，还原产物经湿式弱磁选分离获得铁品位91.62%的铁粉，铁回收率为91.03%。非磁性物采用硫酸酸化、浸出、沉淀得到REO含量93.37%的稀土氧化物，稀土总回收率74.26%。沉淀稀土后的溶液添加氨水调节溶液pH至8.5，得到铌钽沉淀，经煅烧后得到Nb(Ta)2O5含量32.65%的铌钽富集物，铌和钽回收率分别为75.44%和66.21%。
Abstract:A new process composed of direct reduction, acidification and leaching, precipitation and roasting was developed to recover rare earth, niobium, tantalum and iron from a complex rare metal ore. The results show that the iron powder with 91.62% TFe and recovery of 91.03% is obtained when raw ore is mixed with mass fraction 35% alkaline additive, reduced at 1 050 ℃ for 120 min, and then separated by wet low intensity magnetic separation. The rare earth oxide with 93.27% REO and recovery of 74.26% is gained when the nonmagnetic materials are acidized with sulfuric acid, leached and precipitated. Nb-Ta precipitation is obtained from precipitated solution at pH value of 8.5 adjusted with ammonia water. The Nb-Ta enrichment with 32.65% Nb(Ta)2O5 is produced after the precipitation is roasted, and the recovery of niobium and tantalum is 75.44% and 66.21% respectively.
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基金项目:973计划前期研究专项（2012CB724201）；科研院所技术开发研究专项（2012EG115006）
| Author Name | Affiliation | |
| LIU Mu-dan | Guangzhou Research Institute of Non-ferrous Metals | mudanhanyi@126.com |
| LIU Yong | ||
| LIU Zhen-zhen |
引用文本：
刘牡丹,刘勇,刘珍珍.直接还原法处理复杂稀有金属矿新工艺[J].有色金属（冶炼部分）,2013(10):36-38.
LIU Mu-dan,LIU Yong,LIU Zhen-zhen.New Process of Direct Reduction to Treat Complex Rare Metal Ore[J].Nonferrous Metals (Extractive Metallurgy),2013(10):36-38.
刘牡丹,刘勇,刘珍珍.直接还原法处理复杂稀有金属矿新工艺[J].有色金属（冶炼部分）,2013(10):36-38.
LIU Mu-dan,LIU Yong,LIU Zhen-zhen.New Process of Direct Reduction to Treat Complex Rare Metal Ore[J].Nonferrous Metals (Extractive Metallurgy),2013(10):36-38.
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