Welcome to visit The Chinese Journal of Process Engineering, Today is

The Chinese Journal of Process Engineering ›› 2025, Vol. 25 ›› Issue (9): 933-942.DOI: 10.12034/j.issn.1009-606X.224369

• Research Paper • Previous Articles     Next Articles

Synergistic oxygen-enriched alkaline leaching of vanadium mud and slag for enhanced extraction

Chang CHEN1,2,5,  Zhenquan ZHANG4,  Baohua WANG4,  Hao DU2,3,  Jian QI4,  Shaona WANG2,  Haonan LI2,  Minghua WANG1,5,  Biao LIU2*   

  1. 1. School of Metallurgy, Northeastern University, Shenyang, Liaoning 110004, China 2. National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 3. International College, University of Chinese Academy of Sciences, Beijing 100049, China 4. Chengde Vanadium Titanium New Material Co., Ltd., Chengde, Hebei 067102, China 5. Key Laboratory of Ecological Metallurgy of Polymetallic Symbiotic Mines of Ministry of Education, Northeastern University, Shenyang, Liaoning 110819, China
  • Received:2024-11-26 Revised:2025-03-11 Online:2025-09-28 Published:2025-09-26

钒泥-钒渣协同富氧碱浸强化提钒

陈畅1,2,5， 张振全4， 王宝华4， 杜浩2,3， 祁健4， 王少娜2， 李昊男2， 王明华1,5， 刘彪2*   

  1. 1. 东北大学冶金学院，辽宁 沈阳 110004 2. 中国科学院过程工程研究所，战略金属资源绿色循环利用国家工程研究中心，北京 100190 3. 中国科学院大学国际学院，北京 100049 4. 承德钒钛新材料有限公司，河北 承德 067102 5. 东北大学多金属共生矿生态化冶金教育部重点实验室，辽宁 沈阳 110819
  • 通讯作者: 刘彪 liubiao@ipe.ac.cn
  • 基金资助:
    河北省科技重大专项项目;河钢集团重点科技项目

RichHTML

PDF

Abstract: Vanadium mud is a kind of solid waste produced in the process of vanadium leach solution decontamination, which has a high recovery value. In this study, to address the problem that vanadium mud is difficult to be utilized in large quantities, vanadium is extracted from vanadium mud by alkaline leaching of vanadium mud. The effects of reaction temperature, reaction time and NaOH concentration on vanadium extraction were investigated. The best conditions were found to be: 90℃, 2 hours, 20wt% NaOH, liquid to solid ratio of 2∶1. Under these conditions, the leaching rate of vanadium reached 99.23%, and the V2O5 content in tailings was only 0.48wt%. On the basis of alkaline leaching of vanadium from vanadium mud, the extracting vanadium from vanadium mud and vanadium slag by alkaline leaching was studied based on the existing process of extracting vanadium from vanadium slag by oxygen-enriched alkaline leaching. Under the optimized conditions, the vanadium content in the mixed slag was 0.68wt%, the leaching rate of vanadium from vanadium mud was 92.40%, and the vanadium extraction effect from the vanadium slag was improved by about 6 percentage points. The optimal conditions for the oxygen-enriched alkaline synergistic leaching process were a temperature of 150℃ and an oxygen pressure of 0.5 MPa.The leaching slurry was diluted to NaOH concentration of 25wt%, with adding the initial vanadium slag quality of 10wt% of the vanadium mud, leaching temperature of 90℃, leaching time of 1 h. Finally, the mechanism behind collaborative vanadium extraction was investigated during the extraction process. It was clear that the addition of vanadium mud can change the silicon phase to promote the efficient extraction of vanadium from vanadium slag. The method can realize the efficient synergistic extraction of vanadium from svanadium mud and vanadium slag.

Key words: vanadium mud, vanadium slag, oxygen-enriched alkaline leaching, synergistic extraction, comprehensive utilization

摘要： 钒泥是钒浸出液在除杂净化过程中产生的一种固体废弃物，具有极高的回收价值。针对钒泥难以高效利用的问题，采用碱浸提钒法进行钒泥中钒的提取，研究了浸出温度、浸出时间和NaOH浓度对提钒效果的影响规律，筛选出最优条件：在反应温度90℃、反应时间2 h、NaOH浓度20wt%、液固比2∶1的条件下，钒浸出率可达99.23%，此时尾渣中V2O5含量仅为0.48wt%。在此基础上，利用现有的富氧碱浸提钒工艺流程，进行钒泥协同钒渣强化提钒研究。在优化条件下，混合尾渣中钒含量为0.68wt%，钒浸出率为92.40%，钒渣提钒效率提高了约6个百分点。此时最佳的协同浸出工艺反应条件为：在反应温度150℃、氧气压力0.5 MPa的富氧碱浸后的浆料稀释至NaOH浓度为25wt%，添加初始钒渣质量10wt%的钒泥，浸出温度90℃，浸出时间1 h。通过对协同提钒过程进行表征，明确钒泥的加入可改变硅相，促进钒渣中钒的高效提取。该工艺可实现钒泥和钒渣中钒的高效协同提取。

关键词: 钒泥, 钒渣, 富氧碱浸, 协同提取, 综合利用