Efficient extraction metallurgy of vanadium slag: calcium-magnesium composite roasting vanadium extraction process

ZHANG Xu; XIANG Junyi; SHEN Biao; HE Wenyi; WEI Linsen; LÜ Xuewei

doi:10.7513/j.issn.1004-7638.2025.04.001

Volume 46 Issue 4

Aug. 2025

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ZHANG Xu, XIANG Junyi, SHEN Biao, HE Wenyi, WEI Linsen, LÜ Xuewei. Efficient extraction metallurgy of vanadium slag: calcium-magnesium composite roasting vanadium extraction process[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(4): 1-7. doi: 10.7513/j.issn.1004-7638.2025.04.001

Citation:

ZHANG Xu, XIANG Junyi, SHEN Biao, HE Wenyi, WEI Linsen, LÜ Xuewei. Efficient extraction metallurgy of vanadium slag: calcium-magnesium composite roasting vanadium extraction process[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(4): 1-7. doi: 10.7513/j.issn.1004-7638.2025.04.001

Citation:

ZHANG Xu, XIANG Junyi, SHEN Biao, HE Wenyi, WEI Linsen, LÜ Xuewei. Efficient extraction metallurgy of vanadium slag: calcium-magnesium composite roasting vanadium extraction process[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(4): 1-7. doi: 10.7513/j.issn.1004-7638.2025.04.001

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Efficient extraction metallurgy of vanadium slag: calcium-magnesium composite roasting vanadium extraction process

doi: 10.7513/j.issn.1004-7638.2025.04.001

1.
School of Metallurgy and Power Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
2.
State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Pangang Group Research Institute Co., Ltd., Panzhihua 617000, Sichuan, China
3.
Pangang Group Vanadium Titanium Resources Co., Ltd., Panzhihua 617067, Sichuan, China
4.
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

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Received Date: 2025-04-07
Available Online: 2025-08-31
Publish Date: 2025-08-31

Abstract

Abstract

The calcification process is a relatively clean vanadium extraction technology from vanadium slag, but there is still room for further improvement in vanadium yield and product index. The calcium-magnesium composite vanadium extraction process originally developed by our team has achieved the effect of improving vanadium recovery rate, reducing impurity dissolution rate and tailings reduction through ion synergistic effect. In this paper, the comprehensive influence of calcium-magnesium composite on the whole process of vanadium extraction from vanadium slag is expounded. After calcium-magnesium composite roasting, the main vanadium-containing phases in the roasting clinker of vanadium slag are changed from Ca₂V₂O₇ and Mn₂V₂O₇ to Ca₂V₂O₇, Mn₂V₂O₇, Mg₂V₂O₇ and Ca₅Mg₄V₆O₂₄. After acid leaching, the leaching rate of vanadium was increased by about 5%, and the dissolution rate of impurity elements such as Ca and P decreased. The vanadium precipitation rate of ammonium salt in vanadium leaching solution was 99.5%, and the purity of vanadium oxide product was 99.8%. The vanadium precipitation wastewater can be completely reused after lime neutralization treatment without affecting the smooth operation of the original process.
- vanadium slag,
- calcium-magnesium composite roasting,
- vanadium extraction,
- recovery

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References(21)

References

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