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投稿时间：2011-07-05 网络发布日期：2011-12-30
投稿时间：2011-07-05 网络发布日期：2011-12-30
中文摘要: 研究一种从不能用物理选矿法有效富集稀土的复杂稀有金属矿中回收稀土的工艺。原矿在酸矿质量比为1.2时于400 ℃酸化90 min，然后在液固比5∶1、90 ℃浸出120 min，稀土浸出率达到85.64%。浸出液经氧化、中和除杂后，按稀土理论用量的1.2倍添加草酸。得到的草酸稀土沉淀在950 ℃煅烧60 min，可获得REO含量92.4%的氧化稀土产品，全流程稀土总回收率为71.32%。
Abstract:A new rare earth recovery process from complex rare-metal ore, whose rare earth was difficult to enrich by physical beneficiation, was investigated. The results show that the leaching rate of rare earth reaches 85.64% on the optimum conditions: the raw ore is acidulated at 400 ℃ for 90 min with the mass ratio between acid and ore of 1.2, then leached at 90 ℃ for 120 min with the solid/liquid ratio of 5∶1. The leaching liquor is purified through oxidation and neutralization treatment, then adding oxalic acid according to 1.2 times of the rare earth theory dosage. The oxalic rare earth precipitates are roasted at 950 ℃ for 60 min, so the rare earth oxide(REO) products with REO content of 92.4% can be obtained, and the total recovery of rare earth is 71.32%.
keywords: rare-metal ore acidification rare earth oxide(REO)
文章编号： 中图分类号： 文献标志码：
基金项目:广东省科技厅国际合作项目（2009B050700002）
| Author Name | Affiliation |
| LIU Mu-dan，LIU Yong, LIU Zhen-zhen | Guangzhou Research Institute of Non-ferrous Metals, Guangzhou 510650, China |
引用文本：
刘牡丹 ，刘勇，刘珍珍.复杂稀有金属矿稀土回收新工艺[J].有色金属（冶炼部分）,2012(1):32-34.
LIU Mu-dan，LIU Yong, LIU Zhen-zhen.New Process of Rare Earth Recovery from Complex Rare-Metal Ores[J].Nonferrous Metals (Extractive Metallurgy),2012(1):32-34.
刘牡丹 ，刘勇，刘珍珍.复杂稀有金属矿稀土回收新工艺[J].有色金属（冶炼部分）,2012(1):32-34.
LIU Mu-dan，LIU Yong, LIU Zhen-zhen.New Process of Rare Earth Recovery from Complex Rare-Metal Ores[J].Nonferrous Metals (Extractive Metallurgy),2012(1):32-34.
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