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金属矿山 ›› 2017, Vol. 46 ›› Issue (05): 197-200.

• 综合利用 • 上一篇    下一篇

盐酸浸出白云鄂博选铁尾矿中经钙化焙烧的稀土

郑强,边雪,吴文远   

  1. 东北大学冶金学院,辽宁 沈阳 110819
  • 出版日期:2017-05-15 发布日期:2017-10-18
  • 基金资助:

    国家重点基础研究发展计划(973计划)项目(编号:2012CBA01205)。

After Calcium Roasting Rare Earths of Bayan Obo Iron Tailings Leaching by Hydrochloric Acid

Zheng Qiang,Bian Xue,Wu Wenyuan   

  1. School of Metallurgy,Northeastern University,Shenyang 110819,China
  • Online:2017-05-15 Published:2017-10-18

摘要: 白云鄂博选矿厂现弱磁选—强磁选—浮选工艺的弱磁选尾矿再经钙化焙烧—弱磁选选铁后的尾矿REO含量为12.27%,主要成分为稀土氧化物和萤石,氟磷灰石、石英等少量。对盐酸浸出其中稀土氧化物的工艺条件进行了研究。结果显示,在盐酸浓度为1.5 mol/L,浸出温度为 45 ℃,液固比为10∶1 mL/g,浸出时间为60 min,搅拌速度为300 r/min情况下,稀土浸出率可达93.15%,氟浸出率仅为0.23%,表明在控制氟浸出的前提下稀土得到了高效浸出。

关键词: 白云鄂博尾矿, 盐酸浸出, 稀土

Abstract: REO content of tailings from calcium roasting-low intensity magnetic separation tailings from Bayan Obo Plant low intensity magnetic separation-high intensity magnetic separation-flotation was 12.27%.Main components is rare earth oxides,fluorite,small quantity of fluorapatite and quartz.Hydrochloric acid was adopted to study leaching rare earths in material and relevant processing parameters were studied.The results indicated that:when hydrochloric acid concentration is 1.5 mol/L,leaching temperature is 45 ℃,ratio of liquid to solid is 10∶1 mL/g,leaching time is 60 min,stirring rate is 300 r/min,leaching rate of rare earths could reach 93.15% and the leaching ratio of fluorine was only 0.23%.Under the low leaching ratio of fluorine premise,the rare earth could be efficiently leached.

Key words: Bayan Obo tailings, Hydrochloric acid leaching, Rare earths