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粗铌精矿氢氧化钾介质水热溶出试验研究

王卫东 李昭 王晓辉 郑诗礼

王卫东, 李昭, 王晓辉, 郑诗礼. 粗铌精矿氢氧化钾介质水热溶出试验研究[J]. 矿业科学学报, 2017, 2(1): 75-81.
引用本文: 王卫东, 李昭, 王晓辉, 郑诗礼. 粗铌精矿氢氧化钾介质水热溶出试验研究[J]. 矿业科学学报, 2017, 2(1): 75-81.
Wang Weidong, Li Zhao, Wang Xiaohui, Zheng Shili. Experimental study on the extraction of niobium from crude niobium ore by KOH hydrothermal[J]. Journal of Mining Science and Technology, 2017, 2(1): 75-81.
Citation: Wang Weidong, Li Zhao, Wang Xiaohui, Zheng Shili. Experimental study on the extraction of niobium from crude niobium ore by KOH hydrothermal[J]. Journal of Mining Science and Technology, 2017, 2(1): 75-81.

粗铌精矿氢氧化钾介质水热溶出试验研究

基金项目: 国家自然科学基金(51204190,51274208,51474199)
详细信息
    作者简介:

    王卫东(1978—),男,安徽淮北人,副教授,博士,从事洁净煤技术和矿物加工过程检测与控制方面的研究。wwd@cumtb.edu.cn

    通讯作者:

    李昭(1989—),男,山东菏泽人,硕士研究生,从事矿物加工理论、工艺方面的研究。Tel:13126829928

  • 中图分类号: TF841.6

Experimental study on the extraction of niobium from crude niobium ore by KOH hydrothermal

  • 摘要: 本文针对粗铌精矿难以利用的难题,通过对粗铌精矿成分及物相的分析,采用氢氧化钾(KOH)介质水热法进行粗铌精矿溶出试验研究,探索了KOH浓度和温度对粗铌精矿溶出的影响。结果表明:在KOH浓度为30%、温度为200 ℃时,铌的溶出率达到90%;随着KOH浓度和温度的升高,铌的溶出率呈现先增加后降低的趋势;在整个溶出过程中,碱性组分铁(Fe)、锰(Mg)、镁(Mn)的溶出率较低。XRD和SEM等检测结果表明:KOH浓度和温度的增加促进(Fe,Mn)(Nb,Ta)2O6的分解,当KOH浓度超过30%、温度超过200℃时,进一步增加温度或碱浓度,(Fe,Mn)(Nb,Ta)2O6分解生成的可溶性六铌酸钾(K8Nb6O19)发生向不溶性偏铌酸钾(KNbO3)的转化,铌的溶出率显著降低。
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出版历程
  • 收稿日期:  2016-07-13
  • 刊出日期:  2017-02-15

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