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›› 2011, Vol. 11 ›› Issue (5): 747-754.

• 反应与分离 • 上一篇    下一篇

含钒尾渣NaOH亚熔盐浸出提钒

李兰杰 陈东辉 白瑞国 郑诗礼 杜浩 王少娜 张懿   

  1. 承德钢铁集团钒钛工程技术研究中心 河北钢铁股份有限公司承德分公司钒钛工程技术研究中心 河北钢铁股份有限公司承德分公司钒钛工程技术研究中心 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所
  • 收稿日期:2011-09-05 修回日期:2011-09-26 出版日期:2011-10-20 发布日期:2011-10-20
  • 通讯作者: 李兰杰

Leaching of Vanadium from Vanadium-containing Residue by NaOH Sub-molten Salt

LI Lan-jie CHEN Dong-hui BAI Rui-guo ZHENG Shi-li DU Hao WANG Shao-na WANG Shao-na   

  1. Research Center of Vanadium and Titanium Engineering Technology, Chengde Iron and Steel Group Co. LTD Vanadium and Titanium Engineering Technology Research Center, Chengde Iron and Steel Group Co.Ltd., HeBei Iron and Steel Group Co.Ltd. Vanadium and Titanium Engineering Technology Research Center, Chengde Iron and Steel Group Co.Ltd., HeBei Iron and Steel Group Co.Ltd. Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, Chinese Academy of Sciences
  • Received:2011-09-05 Revised:2011-09-26 Online:2011-10-20 Published:2011-10-20
  • Contact: LI Lan-jie

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被引次数

73

摘要： 研究了含钒尾渣NaOH亚熔盐法分解过程中主要反应因素对钒浸出率的影响规律，获得了最佳工艺参数，并对反应机理进行了探讨. 结果表明，反应温度、反应时间及碱渣质量比是最重要的反应因素，其影响程度为反应温度(T)>反应时间(t)>碱渣质量比(r)；含钒尾渣最佳浸出条件为：反应温度170℃，尾渣粒度-74 mm，反应时间3 h，碱渣质量比4:1及搅拌速度700 r/min. 在此条件下，钒浸出率高于90%. 含钒尾渣亚熔盐浸出钒过程前期为化学反应控制，反应活化能为27.69 kJ/mol，NaOH亚熔盐介质通过破坏含硅玻璃体包裹相(辉石相)实现含钒尾渣中钒的高效浸出.

关键词: 含钒尾渣, 亚熔盐, 钒回收, 机理

Abstract: The major reaction factors of vanadium leaching process from vanadium-containing residue using NaOH sub-molten salt were studied, and the optimum process parameters obtained. By analyzing the decomposition process of vanadium-containing residue, the reaction mechanism was obtained at the same time. The significance of reaction temperature, particle size, reaction time, and NaOH-to-residue mass ratio on vanadium extraction was studied. The orthogonal experimental results showed that the impact order of reaction factors was reaction temperature > reaction time > NaOH-to-residue mass ratio with respect to vanadium recovery. Under the conditions of reaction temperature 170℃, NaOH-to-residue 4:1, stirring speed 700 r/min, particle size -74 μm and reaction time 3 h, leaching rate of vanadium was higher than 90%. The leaching process of vanadium, with activation energy 27.69 kJ/mol, was controlled by the chemical reaction in the initial reaction process. Acmite was decomposed, and dissoluble vanadium dissolved into NaOH solution, when the residue was decomposed by NaOH sub-molten salt.

Key words: vanadium-containing residue, sub-molten salt, vanadium recovery, mechanism

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