A novel method for extracting vanadium by low temperature sodium roasting from converter vanadium slag

Rongrui Deng; Hao Xiao; Zhaoming Xie; Zuohua Liu; Qiang Yu; Geng Chen; Changyuan Tao

doi:10.1016/j.cjche.2020.03.038

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A novel method for extracting vanadium by low temperature sodium roasting from converter vanadium slag

Energy, Resources and Environmental Technology | Updated：2026-01-06

- A novel method for extracting vanadium by low temperature sodium roasting from converter vanadium slag
- Chinese Journal of Chemical Engineering Vol. 28, Issue 8, Pages: 2208-2213(2020)
- Affiliations：
  
  1. College of Chemistry and Chemical Engineering, Chongqing University,Chongqing,China,400044
  2. Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization,Chongqing,China,400044
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2020.03.038
  CLC：
- Published：2020
- Accepted：
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Rongrui Deng, Hao Xiao, Zhaoming Xie, Zuohua Liu, Qiang Yu, Geng Chen, Changyuan Tao. A novel method for extracting vanadium by low temperature sodium roasting from converter vanadium slag[J]. Chinese Journal of Chemical Engineering, 2020, 28(8): 2208-2213.
DOI：

Rongrui Deng, Hao Xiao, Zhaoming Xie, Zuohua Liu, Qiang Yu, Geng Chen, Changyuan Tao. A novel method for extracting vanadium by low temperature sodium roasting from converter vanadium slag[J]. Chinese Journal of Chemical Engineering, 2020, 28(8): 2208-2213. DOI： 10.1016/j.cjche.2020.03.038.

摘要

Abstract

Long-term high temperature in conventional vanadium extraction process would cause particles to be sintered and wrapped

thus reducing extraction efficiency of vanadium. Based on the purpose of directional conversion and process intensification

this work proposed a combination of low temperature sodium roasting and high efficiency selective oxidation leaching in vanadium extraction. The investigation of the reaction mechanism suggested that the structure of vanadium slag was changed by roasting

which also caused the fracture of spinel. The addition of MnO

promoted the directional oxidation of low-valent vanadium into high valence. It also found that Na

could oxidize low-valent vanadium effectively in leaching. The leaching efficiency of vanadium reached 87.74% under the optimum conditions

including a roasting temperature of 650 ℃

a roasting time of 2.0 h

a molar ratio of sodium-to-vanadium of 0.6

a MnO

(roasting additive) dosage of 5 wt% and a Na

(leaching oxidant) dosage of 5 wt%. This percentage is 7.18% higher than that of direct roasting-andleaching under

the same conditions.

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