Multi-component leaching behavior and influence rule of calcified vanadium slag in acid leaching process

YU Tangxia; WEN Jing; PING Xinhao; JIANG Tao; ZHANG Lin; LI Yuepeng; YANG Xiong

doi:10.7513/j.issn.1004-7638.2025.06.006

Volume 46 Issue 6

Dec. 2025

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YU Tangxia, WEN Jing, PING Xinhao, JIANG Tao, ZHANG Lin, LI Yuepeng, YANG Xiong. Multi-component leaching behavior and influence rule of calcified vanadium slag in acid leaching process[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(6): 57-65. doi: 10.7513/j.issn.1004-7638.2025.06.006

Citation:

YU Tangxia, WEN Jing, PING Xinhao, JIANG Tao, ZHANG Lin, LI Yuepeng, YANG Xiong. Multi-component leaching behavior and influence rule of calcified vanadium slag in acid leaching process[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(6): 57-65. doi: 10.7513/j.issn.1004-7638.2025.06.006

Citation:

YU Tangxia, WEN Jing, PING Xinhao, JIANG Tao, ZHANG Lin, LI Yuepeng, YANG Xiong. Multi-component leaching behavior and influence rule of calcified vanadium slag in acid leaching process[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(6): 57-65. doi: 10.7513/j.issn.1004-7638.2025.06.006

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Multi-component leaching behavior and influence rule of calcified vanadium slag in acid leaching process

doi: 10.7513/j.issn.1004-7638.2025.06.006

YU Tangxia^1
,,
WEN Jing¹,
PING Xinhao¹,
JIANG Tao^{1, 2, 3
,
,},
ZHANG Lin⁴,
LI Yuepeng⁴,
YANG Xiong⁴

1.
School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China
2.
Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education) Northeastern University, Shenyang 110819, Liaoning, China
3.
Liaoning Key Laboratory for Metallurgical Sensor and Technology, Shenyang 110819, Liaoning, China
4.
Pangang Group Xichang Vanadium Products Science and Technology Co., Ltd, Xichang 615000, Sichuan, China

More Information

Received Date: 2025-05-29
Accepted Date: 2025-07-18
Rev Recd Date: 2025-07-02

Available Online: 2025-12-31

Publish Date: 2025-12-31

Abstract

Abstract

The effects of MFe content in vanadium slag, Ca/V molar ratio (n(CaCO₃)/n(V₂O₃)), roasting temperature, and leaching pH on the leaching behavior of vanadium (V) and impurities (Mn, Fe, Cr, Mg, Ti, Si) were systematically investigated. The results show that V leaching efficiency can reach 91.68% under a condition of low MFe content, a Ca/V molar ratio of 1.0, roasting temperature of 900 ℃, and leaching pH of 2.8. The leaching efficiencies of Mn and Mg exhibit a similar trend: decreasing with the increase of MFe content or Ca/V ratio; being relatively stable at approximately 38% and 20%, respectively, in the roasting temperature range of 800-950℃ and leaching pH range of 2.2-3.0. Fe leaching efficiency correlates directly with MFe content and is suppressed by high roasting temperatures and high leaching pH; it is minimally affected by the Ca/V ratio and remains below 0.04%. The leaching efficiencies of Cr, Ti, and Si all decrease with the increase of MFe content or roasting temperature; Cr leaching rate remains unaffected by the changes in the Ca/V ratio, while those of Ti and Si increase with a higher Ca/V ratio. Regarding leaching pH: Si leaching efficiency decreases with the increase of pH, and Ti leaching efficiency decreases, while Cr leaching efficiency remains stable at around 0.1%.
- vanadium slag,
- V leaching rate,
- impurity components,
- leaching rule

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References(21)

References

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