Study on leaching behavior of vanadium in acid leaching process of calcium and manganese vanadate system

Li Feifei; Wen Jing; Jiang Tao; Li Changqing; Xiao Hao

doi:10.7513/j.issn.1004-7638.2024.03.003

Volume 45 Issue 3

Jul. 2024

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Li Feifei, Wen Jing, Jiang Tao, Li Changqing, Xiao Hao. Study on leaching behavior of vanadium in acid leaching process of calcium and manganese vanadate system[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(3): 16-24. doi: 10.7513/j.issn.1004-7638.2024.03.003

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Li Feifei, Wen Jing, Jiang Tao, Li Changqing, Xiao Hao. Study on leaching behavior of vanadium in acid leaching process of calcium and manganese vanadate system[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(3): 16-24. doi: 10.7513/j.issn.1004-7638.2024.03.003

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Study on leaching behavior of vanadium in acid leaching process of calcium and manganese vanadate system

doi: 10.7513/j.issn.1004-7638.2024.03.003

Li Feifei^1
,,
Wen Jing¹,
Jiang Tao^{1, 2
,
,},
Li Changqing¹,
Xiao Hao¹

1.
School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China
2.
Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Shenyang 110819, Liaoning, China

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Received Date: 2024-01-16
Publish Date: 2024-07-02

Abstract

Abstract

Calcium vanadate and manganese vanadate are important roasting products in the calcification roasting process of vanadium slag, and their dissolution and leaching behavior in sulfuric acid has an important effect on the vanadium yield in the vanadium extraction process. In this paper, the effects of leaching pH, time and temperature on the leaching behavior of vanadium components in the synthesis of calcium vanadate (or manganese vanadate), vanadium slag calcification (or reaction with manganese) and calcium-manganese composite roasting clinker were studied by single factor test step-by-step method. The results showed that the maximum leaching rate of vanadium was 43.62%, 98.79%, 97.98% and 98.06% when the synthetic CaV₂O₆, Ca₂V₂O₇, Ca₃V₂O₈ and Mn₂V₂O₇ were leached at 60℃ for 60 min at pH 3.0, 3.0, 5.0 and 2.2, respectively. When the pH value is 1.0～2.0, the leaching rate of the four vanadates shows a low peak, which is caused by the hydrolysis of vanadium. Ca₂V₂O₇ and Mn₂V₂O₇ vanadate were mainly formed during the conventional calcification and manganese roasting of vanadium slag, and the leaching rates of vanadium were 85.24% and 87.07%, respectively, when the leaching pH value was 2.5. The leaching rate of vanadium after clinker leaching in sulfuric acid solution with pH value of 2.5 was 90.09%, which was about four percentage points higher than that of vanadium in conventional calcification and manganese systems, indicating that the synergistic extraction of vanadium from calcium and manganese had a certain strengthening effect on vanadium extraction with a single additive.
- vanadium slag,
- calcification roasting,
- calcium vanadate,
- manganese vanadate,
- leaching behavior

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References(22)

References

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