Research on vanadium extraction from vanadium-titanium iron concentrate pellets by gradient calcination roasting and sulfuric acid selective leaching

WANG Qiang; WU Enhui; LI Jun; XU Zhong; ZHANG Yuan; LIU Peng; ZUO Chengyang

doi:10.7513/j.issn.1004-7638.2026.03.003

Volume 47 Issue 3

Jun. 2026

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WANG Qiang, WU Enhui, LI Jun, XU Zhong, ZHANG Yuan, LIU Peng, ZUO Chengyang. Research on vanadium extraction from vanadium-titanium iron concentrate pellets by gradient calcination roasting and sulfuric acid selective leaching[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(3): 20-30. doi: 10.7513/j.issn.1004-7638.2026.03.003

Citation:

WANG Qiang, WU Enhui, LI Jun, XU Zhong, ZHANG Yuan, LIU Peng, ZUO Chengyang. Research on vanadium extraction from vanadium-titanium iron concentrate pellets by gradient calcination roasting and sulfuric acid selective leaching[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(3): 20-30. doi: 10.7513/j.issn.1004-7638.2026.03.003

Citation:

WANG Qiang, WU Enhui, LI Jun, XU Zhong, ZHANG Yuan, LIU Peng, ZUO Chengyang. Research on vanadium extraction from vanadium-titanium iron concentrate pellets by gradient calcination roasting and sulfuric acid selective leaching[J]. IRON STEEL VANADIUM TITANIUM, 2026, 47(3): 20-30. doi: 10.7513/j.issn.1004-7638.2026.03.003

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Research on vanadium extraction from vanadium-titanium iron concentrate pellets by gradient calcination roasting and sulfuric acid selective leaching

doi: 10.7513/j.issn.1004-7638.2026.03.003

WANG Qiang^1
,,
WU Enhui^{1, 2, 3
,
,},
LI Jun^{1, 2, 3},
XU Zhong^{1, 3},
ZHANG Yuan^{1, 3},
LIU Peng^{1, 2},
ZUO Chengyang^{1, 2}

1.
College of Vanadium and Titanium, Panzhihua University, Panzhihua 617000, Sichuan, China
2.
Vanadium and Titanium Critical Strategic Materials Key Laboratory of Sichuan Province, Panzhihua 617000, Sichuan, China
3.
Sichuan Engineering Laboratory for Solar Energy Utilization Technology Integrated, Panzhihua 617000, Sichuan, China

More Information

Received Date: 2026-02-02
Accepted Date: 2026-03-31
Rev Recd Date: 2026-03-26
Publish Date: 2026-06-29

Abstract

Abstract

Using vanadium-titanium magnetite concentrate as the raw material and calcium oxide as the additive, the selective extraction of vanadium was carried out by the process of gradient calcination roasting and sulfuric acid leaching. The influence laws of the gradient calcination roasting system and the selective leaching process parameters on the leaching rates of vanadium and iron from the calcined balls and the strength of the balls were systematically studied. The research results of the gradient calcination roasting system indicated that as the primary oxidation temperature increased and the primary oxidation time extended, the leaching rate of vanadium first increased and then decreased. Increasing the secondary oxidation temperature and extending the secondary oxidation time led to an increase in the leaching rate of vanadium first and then tended to be stable. The experimental results of the selective leaching showed that as the leaching time extended and the liquid-solid ratio increased, the leaching rate of vanadium first increased and then tended to be stable. As the sulfuric acid concentration increased, the leaching rate of vanadium first increased and then decreased. With a fixed calcium oxide ratio of 3%, the optimized gradient calcination system was a primary oxidation temperature and time of 850 ℃ and 90 min, a secondary oxidation temperature and time of 1200 ℃ and 45 min. The optimized leaching process parameters were an leaching time of 120 h, a sulfuric acid concentration of 2 mol/L, and a liquid-solid ratio of 7. Under these aforementioned conditions, the leaching rates of vanadium and iron were 79.86% and 0.65%, respectively, and the compressive strengths of the balls before and after leaching were 1920.8 N/Pellet and 143.3 N/Pellet.
- vanadium-titanium iron concentrate,
- gradient roasting,
- selective leaching,
- sulfuric acid,
- vanadium

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References(26)

References

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