东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (9): 1291-1297.DOI: 10.12068/j.issn.1005-3026.2019.09.014

• 材料与冶金 • 上一篇    下一篇

利用二元钠盐体系处理钒渣的清洁焙烧工艺

滕艾均1, 徐红红2, 薛向欣1   

  1. (1. 东北大学 冶金学院, 辽宁 沈阳110819; 2. 东北大学 计算机科学与工程学院, 辽宁 沈阳110169)
  • 收稿日期:2018-09-19 修回日期:2018-09-19 出版日期:2019-09-15 发布日期:2019-09-17
  • 通讯作者: 滕艾均
  • 作者简介:滕艾均(1989-),男,河北黄骅人,东北大学博士研究生; 薛向欣(1954-),男,辽宁沈阳人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金-云南省自然科学基金联合资助项目(U1502273); 中央高校基本科研业务费专项资金资助项目(N150203003,N150202001).

Clean Roasting Process for Treating Vanadium Slag by Using Binary Sodium Salts System

TENG Ai-jun1, XU Hong-hong2, XUE Xiang-xin1   

  1. 1. School of Metallurgy, Northeastern University, Shenyang 110819, China; 2. School of Computer Science & Engineering, Northeastern University, Shenyang 110169, China.
  • Received:2018-09-19 Revised:2018-09-19 Online:2019-09-15 Published:2019-09-17
  • Contact: XUE Xiang-xin
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摘要: 试验研究了利用二元钠盐(NaOH-Na2CO3)对钒渣进行焙烧,并分析了相关动力学参数对焙烧效果的影响.结果表明:在二元钠盐焙烧过程中,焙烧温度、焙烧时间及NaOH与Na2CO3质量比对渣中钒、铬的浸出率影响重大;焙烧过程中,Fe3O4被氧化为Fe2O3,V2O5和Cr2O3分别被氧化为β钒酸钠型结构的Na3VO4与正交晶系结构的Na2CrO4;最佳焙烧条件下,NaOH与 Na2CO3质量比为1.5∶1,焙烧温度为600℃,焙烧时间为60min,此时钒与铬的浸出率分别为98.66%与83.57%;浸出尾渣的主要金属元素为Fe.

关键词: 钒渣, NaOH-Na2CO3二元焙烧, 相变, 浸出率, 尾渣

Abstract: The vanadium slag was treated by NaOH-Na2CO3 binary sodium salts in the roasting process and the influence of related kinetic parameters on roasting effect was investigated. The results showed that during the NaOH-Na2CO3 binary roasting process, the roasting temperature, roasting time and NaOH to Na2CO3 mass ratio play significant roles in the extraction rate of vanadium and chromium. The ferriferous oxide(Fe3O4)is oxidized to ferric oxide(Fe2O3)while V2O5 and Cr2O3 are converted to the β-natrium-vanadate type structure of Na3VO4 and orthorhombic-type crystal structure of Na2CrO4, respectively. Under the optimum roasting conditions(roasting temperature of 600℃, roasting time of 60min, and NaOH to Na2CO3 mass ratio of 1.5∶1), the extraction rate of vanadium and chromium is 98.66% and 83.57%, respectively. The major metal element in the leaching residue is Fe.

Key words: vanadium slag, NaOH-Na2CO3 binary roasting, phase transformation, extraction rate, residue

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