Exploration of roasting vanadium extraction from vanadium slag and Na<sub>2</sub>O<sub>2</sub>

Shao Shengqi; Yue Hongrui; Cao Xiaozhou; Cheng Gongjin; Liu Jianxing; Xue Xiangxin

doi:10.7513/j.issn.1004-7638.2022.01.005

Volume 43 Issue 1

Mar. 2022

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Shao Shengqi, Yue Hongrui, Cao Xiaozhou, Cheng Gongjin, Liu Jianxing, Xue Xiangxin. Exploration of roasting vanadium extraction from vanadium slag and Na2O2[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(1): 28-35. doi: 10.7513/j.issn.1004-7638.2022.01.005

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Shao Shengqi, Yue Hongrui, Cao Xiaozhou, Cheng Gongjin, Liu Jianxing, Xue Xiangxin. Exploration of roasting vanadium extraction from vanadium slag and Na₂O₂[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(1): 28-35. doi: 10.7513/j.issn.1004-7638.2022.01.005

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Exploration of roasting vanadium extraction from vanadium slag and Na₂O₂

doi: 10.7513/j.issn.1004-7638.2022.01.005

School of Metallurgy, Northeastern University, Shengyang 110819, Liaoning, China

Received Date: 2021-12-19
Available Online: 2022-04-24
Publish Date: 2022-02-28

Abstract

Abstract

Vanadium slag and sodium peroxide (Na₂O₂) were mixed, briquetted, roasted, and leached to rich vanadium into V₂O₅. The effects of roasting temperature, briquetting pressure, roasting time, Na₂O₂ content, and leaching temperature on the vanadium leaching rate were studied. The results showed that the vanadium leaching rate first increased and then decreased as the molar ratio of Na₂O₂ to V₂O₅ increased from 0.5∶1 to 4∶1, the roasting temperature increased from 700 ℃ to 1000 ℃, and the briquetting pressure increased from 1 MPa to 25 MPa. The vanadium leaching rate reached the maximum 95.57% with the Na₂O₂/V₂O₅ of 3∶1, the roasting temperature of 850 ℃, and the pressure of 5 MPa. As for the roasting time in the range of 0.5–2.5 h and the leaching temperature of 60–100 ℃, the vanadium leaching rate fluctuated and reached the maximum at 2.5 h and 80 ℃. Under the optimum conditions, the vanadium leaching rate reached 95.57%. Meanwhile, the phases during roasting were analyzed and characterized by X-ray diffraction and electron probe microanalysis. The results showed that the main phases were Fe₂O₃, Fe₃O₄, Ca(TiO₃), Na₃VO₄, Mg_0.165Mn_0.835O. Finally, ammonium salt was added into the leaching solution containing vanadium, and 96.84% V₂O₅ was obtained through precipitation and calcining process.
- extraction of vanadium,
- vanadium slag,
- sodiumization roasting,
- Na₂O₂,
- briquetting,
- leaching rate

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References(23)

References

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