东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (2): 205-210.DOI: 10.12068/j.issn.1005-3026.2018.02.012

• 材料与冶金 • 上一篇    下一篇

白云鄂博尾矿一步法焙烧实验研究

郑强， 吴文远， 边雪   

  1. (东北大学 冶金学院， 辽宁 沈阳110819)
  • 收稿日期:2016-08-19 修回日期:2016-08-19 出版日期:2018-02-15 发布日期:2018-02-09
  • 通讯作者: 郑强
  • 作者简介:郑强(1989-)，男，山西朔州人，东北大学博士研究生； 吴文远(1951-)，男，黑龙江哈尔滨人，东北大学教授，博士生导师.
  • 基金资助:
    国家重点基础研究计划项目(2012CBA01205)； 中央高校基本科研业务费专项资金资助项目(N150204019).

Experimental Study on One-Step Roasting of Bayan Obo Tailings

ZHENG Qiang， WU Wen-yuan， BIAN Xue   

  1. School of Metallurgy， Northeastern University， Shenyang 110819， China.
  • Received:2016-08-19 Revised:2016-08-19 Online:2018-02-15 Published:2018-02-09
  • Contact: WU Wen-yuan
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摘要： 采用差热分析(TG-DTA)和X射线衍射(XRD)方法研究了C-Ca(OH)2-NaOH体系焙烧白云鄂博尾矿的过程，考察了焙烧温度、焙烧时间、煤用量、Ca(OH)2用量及NaOH用量对尾矿中稀土矿分解和赤铁矿还原的影响.结果表明:在焙烧温度为650℃，焙烧时间为60min，煤加入量为2%，Ca(OH)2加入量为4%，NaOH加入量为2%的条件下，赤铁矿可以有效地还原为磁铁矿，还原磁化率为2.37;同时，稀土矿有效地分解成稀土氧化物，稀土浸出率达98.39%.

关键词: 白云鄂博尾矿, 稀土矿, 赤铁矿, 分解, 焙烧

Abstract: The roasting process of Bayan Obo tailings in C-Ca(OH)2-NaOH was investigated by means of thermogravimetric and differential thermal analysis(TG-DTA)and X-ray diffraction(XRD). The influences of the roasting temperature， roasting time， coal content， Ca(OH)2 dosage and NaOH dosage were explored on the decomposition of rare earth minerals and the reduction of hematite. The results showed that the hematite was reduced to magnetite(magnetic susceptibility: 2.37)and the rare earth minerals were decomposed by forming rare earth oxides(the leaching ratio of REO: 98.39%)under the optimal conditions. The optimal conditions were as follows: the roasting temperature of 650℃， the roasting time of 60min， the coal content of 2%， Ca(OH)2 dosage of 4% and NaOH dosage of 2%.

Key words: Bayan Obo tailings, rare earth mineral, hematite, decomposition, roasting

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