欢迎访问过程工程学报, 今天是

过程工程学报 ›› 2017, Vol. 17 ›› Issue (4): 744-750.DOI: 10.12034/j.issn.1009-606X.216353

• 反应与分离 • 上一篇    下一篇

钒化工流程高效提取钒元素

耿立唐, 李兰杰*, 赵备备, 白瑞国   

  1. 河钢股份有限公司承德分公司,河北 承德 067102
  • 收稿日期:2016-11-28 修回日期:2017-01-26 出版日期:2017-08-20 发布日期:2017-08-16
  • 通讯作者: 李兰杰 lilanjie20040014@163.com
  • 基金资助:
    水资源高效开发利用专项;河北省科技计划项目

High Efficiency Leaching of Vanadium in Vanadium Chemical Process

Litang GENG,  Lanjie LI*,  Beibei ZHAO,  Ruiguo BAI   

  1. Chengsteel Group Co., Ltd., HeSteel Group Co., Ltd., Chengde, Hebei 067102, China
  • Received:2016-11-28 Revised:2017-01-26 Online:2017-08-20 Published:2017-08-16
  • Contact: LI Lan-jie lilanjie20040014@163.com

摘要: 进行了强碱浸出钒渣焙烧熟料实验及钒化工固体废料(脱硅渣、钒酸铁泥、二次渣)混料低碱量焙烧实验,以提高现有钒渣钠化焙烧工艺钒浸出率. 结果表明,钒相被赤铁矿相(Fe2O3)、板钛矿相(Fe2TiO5)及锥辉石相[NaFe(SiO3)2]包裹,强碱浸出钒渣钠化焙烧熟料工艺中NaOH浓度为10 g/L时,钒浸出率高达83.15%,过滤效率提高12%;二次渣配脱硅渣后加NaOH或Na2CO3焙烧均可高效浸出钒,尾渣含钒仅为0.57%;混渣采用混碱(Na2CO3和NaOH复合添加剂)焙烧提钒,钒酸铁泥配加量在8%以下时,二次渣配钒酸铁泥加Na2CO3焙烧可高效浸出钒,尾渣含钒仅为0.68%.

关键词: 钒, 焙烧熟料, 二次渣, 脱硅渣, 钒酸铁泥, 钒浸出率

Abstract: In order to improve the leaching rate of vanadium in the existing sodium roasting of vanadium slag process, strong alkali leaching of roasted clinker and roasting mixed vanadium chemical solid waste (desiliconized slag, ferric vanadate and secondary slag) under a small quantity of alkalis was carried out. The results showed that vanadium-bearing mineral is maily wrapped by phases hematite (Fe2O3), pseudobrookite (Fe2TiO5) and acmite [NaFe(SiO3)2]. When the concentration of NaOH was 10 g/L in strong alkali leaching of roasted clinker process, the leaching rate of vanadium is higher, up to 83.15%, and the filter efficiency increased by 12%. High efficiency leaching of vanadium can be achieved by adding NaOH or Na2CO3 to the mixture of desiliconized slag and secondary slag and roasting, vanadium content in tailings is only 0.57%. Roasting mixed slag with mixed alkali (Na2CO3 and NaOH composite additives) was employed. When the dosage of ferric vanadate is less than 8%, high efficiency leaching of vanadium can be achieved by adding Na2CO3 to the mixture of ferric vanadate slag and secondary slag and roasting, vanadium content in tailings is only 0.68%.

Key words: Vanadium, Roasted clinker, Desiliconized slag, Ferric vanadate, Secondary slag, Leaching rate of vanadium