• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Metallurgical and Materials Transactions B >Recovery of Rare Earths, Niobium, and Thorium from the Tailings of Giant Bayan Obo Ore in China
【24h】

Recovery of Rare Earths, Niobium, and Thorium from the Tailings of Giant Bayan Obo Ore in China

机译：从中国巴彦鄂博大型尾矿中回收稀土，铌和Thor。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The recovery of rare earths, niobium, and thorium from Bayan Obo’s tailings has been investigated because the Bayan Obo ore is rich in rare earths and rich in niobium and thorium, but it is mined mainly as an iron ore and will be used up soon. By carbochlorination between 823 K (550 °C) and 873 K (600 °C) for 2 hours, 76 to 93 pct of rare earths were recovered from the tailings, which were much higher than those from Bayan Obo’s rare earth concentrate, together with 65 to 78 pct of niobium, 72 to 92 pct of thorium, 84 to 91 pct of iron, and 81 to 94 pct of fluorine. This suggests a cooperative reaction mechanism that carbochlorination of iron minerals (and carbonates) in the tailings enhances that of rare earth minerals, which is supported by a thermodynamic analysis. Subsequently, niobium separation from the low-volatile, ultrahigh iron chloride mixture was achieved efficiently by selective oxidation with Fe2O3. This process, combined with the best available technologies for separation of rare earths and thorium from the involatile chloride mixture and for comprehensively using other valuable elements, allows the ore to minimize radioactive waste and to use rare metal resources sustainably in the future.
机译：已经对从巴颜鄂博尾矿中回收稀土，铌和or进行了调查，因为巴颜鄂博矿石富含稀土元素，并且富含铌和or，但主要作为铁矿石开采，并将很快用完。通过在823 K（550°C）和873 K（600°C）之间进行碳氯化2小时，从尾矿中回收了76至93 pct的稀土，其含量远高于来自Bayan Obo稀土精矿的稀土，以及65至78％的铌，72至92％的or，84至91％的铁和81至94％的氟。这表明了一种协同反应机制，即尾矿中铁矿物质（和碳酸盐）的碳氯化作用增强了稀土矿物质的碳氯化作用，这得到了热力学分析的支持。随后，通过用Fe2 O3 进行选择性氧化，有效地从低挥发性，超高氯化铁混合物中分离了铌。此过程与从不挥发的氯化物混合物中分离稀土和or以及全面使用其他有价值元素的最佳可行技术相结合，使矿石能够最大限度地减少放射性废物，并在未来可持续地使用稀有金属资源。

著录项

  • 来源
    《Metallurgical and Materials Transactions B》 |2012年第3期|p.485-493|共9页
  • 作者

    Xiu-Lan Yu; Li Bai; Qing-Chun Wang; Jia Liu; Ming-Yu Chi; Zhi-Chang Wang;

  • 作者单位

    Department of Chemistry, Northeastern University, Shenyang, 110004, P.R. China;

    Department of Chemistry, Northeastern University, Shenyang, 110004, P.R. China;

    Department of Chemistry, Northeastern University, Shenyang, 110004, P.R. China;

    Department of Chemistry, Northeastern University, Shenyang, 110004, P.R. China;

    Department of Chemistry, Northeastern University, Shenyang, 110004, P.R. China;

    Department of Chemistry, Northeastern University, Shenyang, 110004, P.R. China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号