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›› 2012, Vol. 12 ›› Issue (2): 218-222.

• 反应与分离 • 上一篇    下一篇

包钢选矿厂尾矿中稀土与铁共提取

张丽清 赵玲燕 周华锋 袁本福   

  1. 沈阳化工大学应用化学学院 沈阳化工大学应用化学学院 沈阳化工学院应用化学学院 沈阳化工学院应用化学学院
  • 收稿日期:2011-12-31 修回日期:2012-03-20 出版日期:2012-04-20 发布日期:2012-04-20
  • 通讯作者: 张丽清

Co-extraction of Rare Earth and Iron from Baogang Tailings

ZHANG Li-qing ZHAO Ling-yan ZHOU Hua-feng YUAN Ben-fu   

  1. Applied Chemistry College Shenyang Institute of Chemical Technology Applied Chemistry College Shenyang Institute of Chemical Technology Applied Chemistry College Shenyang Institute of Chemical Technology Applied Chemistry College Shenyang Institute of Chemical Technology
  • Received:2011-12-31 Revised:2012-03-20 Online:2012-04-20 Published:2012-04-20
  • Contact: ZHANG Li-qing

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摘要： 研究了包钢选矿厂尾矿经稀硫酸-稀盐酸溶解、溶解液在乙醇作用下结晶共提取稀土与铁的新工艺. 实验考察了稀硫酸溶解稀土尾矿时，溶解温度、硫酸浓度等对稀土和铁溶解率的影响. 最佳条件下稀硫酸溶解液中稀土溶解率低于8%，铁的溶解率大于94%. Fe3+经工业铁屑还原为Fe2+，在室温下用乙醇提取FeSO4，FeSO4纯度为98.21%，尾矿中铁回收率达89.51%. 稀盐酸不溶物中稀土氧化物(REO)品位为43.60%，稀土回收率达78.82%，新工艺实现了稀土和铁资源的提取分离.

关键词: 尾矿, 稀土, 乙醇, 硫酸亚铁

Abstract: A novel dissolving-extraction process of Baogang tailings in the dilute sulphuric acid and then dilute hydrochloric acid was studied. The effects of reaction temperature and sulfuric acid concentration on dissolution rate of the rare earth and iron were investigated and the total amount of rare earth in the acid dissolution of Baogang tailings was determined by spectrophotometry. The leaching rate of rare earth was less than 8% and the leaching rate of iron higher than 94% in the sulfuric acid dissolution. Fe3+ in sulfuric acid dissolution was reduced to Fe2+ by industrial scrap iron. FeSO4 was extracted by ethanol at room temperature. Its purity was 98.21% and the over-all recovery rate of iron in the tailings 89.51%. The grade of REO in the dilute hydrochloric acid insoluble residue was 43.60% and their total recovery rate 78.82%. This study provides a new method for extraction and separation of rare earth and iron from Baogang tailings.

Key words: tailing, rare earth, ethanol, ferrous sulphate

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