New process for extracting vanadium by direct calcification using the heat of molten vanadium slag

  • Jinwei Qu Northeastern university
  • Tingan Zhang Northeastern University
  • Guozhi Lv Northeastern University
  • Yang Chen Northeastern University
Keywords: molten vanadium slag; CaO; oxidation; calcification; leaching

Abstract


A novel technology for extracting vanadium from molten converter vanadium slag was studied at the laboratory scale by oxidation and calcification. The effect of the cooling method, CaO addition and oxygen blowing time on the phases of calcified vanadium slag was studied. Under the action of oxygen and CaO, vanadium slag will undergo a calcification reaction to form acid-soluble calcium vanadate. The possibility of its main chemical reactions can be calculated by Factsage8.1. The calcified vanadium slag was leached by H2SO4 solution and characterized by XRF, XRD, SEM and EDS techniques. Compared with the traditional process, the new process saved much energy, and it was faster and more efficient. The XRD results showed that CaV2O5, Ca7V4O17 and Ca3V2O8 were gradually formed in the molten vanadium slag with increasing CaO addition. However, when too much CaO was added, Ca2SiO4 and CaTiO3 were also formed. These phases wrapped part of the vanadium and reduced the leaching rate of vanadium. When the mass ratio of Ca to V was 0.75, under the optimal acid leaching conditions (particle size of calcified vanadium slag less than 0.075 mm, leaching temperature 90 ℃, H2SO4 concentration 200 g.L-1, liquid-to-solid ratio 6:1 ml.g-1, leaching time 60 min, stirring speed 300r.min-1), the leaching rate of vanadium from calcified vanadium slag could exceed 90%. The new process not only saved energy and reduced emissions, but also reached the average level of the existing vanadium extraction process.

Author Biographies

Jinwei Qu, Northeastern university

School of Metallurgy, Ph.D.

Tingan Zhang, Northeastern University

School of Metallurgy, Professor,Russian foreign academician

Guozhi Lv, Northeastern University

School of Metallurgy, Professor

Yang Chen, Northeastern University

School of Metallurgy, Ph.D.

References

[1] Wang, L., Yao, Y., Liang, F. et al. Study on Factors of Vanadium Extraction from Low-Grade Vanadium Slag with High Silicon Content by Roasting. Silicon 12, 1691–1698 (2020).

https://doi.org/10.1007/s12633-019-00274-7

[2] Zhang, Gq., Zhang, Ta., Lü, Gz. et al. Extraction of vanadium from vanadium slag by high pressure oxidative acid leaching. Int J Miner Metall Mater 22, 21–26 (2015).

https://doi.org/10.1007/s12613-015-1038-6

[3] Yang, Qw., Xie, Zm., Peng, H. et al. Leaching of vanadium and chromium from converter vanadium slag intensified with surface wettability. J. Cent. South Univ. 25, 1317–1325 (2018).

https://doi.org/10.1007/s11771-018-3828-2

[4] Qie, J., Gao, J., Zhang, Y. et al. Smelting Reduction Characteristics and Mechanism of Vanadium–Titanium Magnetite Carbon-Bearing Pellet. Trans Indian Inst Met 74, 341–353 (2021).

https://doi.org/10.1007/s12666-020-02132-2

[5] Zhou, M., Yang, S., Jiang, T. et al. Influence of coke content on sintering process of chromium-containing vanadium-titanium magnetite. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 33, 68–72 (2018).

https://doi.org/10.1007/s11595-018-1787-y

[6] He, Z., Yue, H. & Xue, X. Study of the High Temperature Metallurgical Properties of On-Site Samples with Vanadium–Titanium Magnetite. Trans Indian Inst Met 71, 2001–2013 (2018).

https://doi.org/10.1007/s12666-018-1333-9

[7] Yin, C., Zhang, S., Yang, X. et al. Smelting Vanadium–Titanium Magnetite by COREX Process: Effect of V–Ti Bearing Pellet Ratio on the Softening and Melting Behavior of Mixed Burden. Metall Mater Trans B 52, 4096–4108 (2021).

https://doi.org/10.1007/s11663-021-02331-2

[8] Zhao, W., Chu, M., Liu, Z. et al. High-Temperature Interactions Between Vanadium-Titanium Magnetite Carbon Composite Hot Briquettes and Pellets Under Simulated Blast Furnace Conditions. Metall Mater Trans B 50, 1878–1895 (2019).

https://doi.org/10.1007/s11663-019-01616-x

[9] Song, WC., Li, K., Zheng, Q. et al. A Novel Process of Vanadium Extraction from Molten Vanadium Bearing Slag. Waste Biomass Valor 5, 327–332 (2014).

https://doi.org/10.1007/s12649-013-9286-z

[10] Guo, Y., Li, Hy., Yuan, Yh. et al. Microemulsion leaching of vanadium from sodium-roasted vanadium slag by fusion of leaching and extraction processes. Int J Miner Metall Mater 28, 974–980 (2021).

https://doi.org/10.1007/s12613-020-2105-1

[11] Li, M., Du, H., Zheng, S. et al. Extraction of Vanadium from Vanadium Slag Via Non-salt Roasting and Ammonium Oxalate Leaching. JOM 69, 1970–1975 (2017).

https://doi.org/10.1007/s11837-017-2494-4

[12] Wen, J., Jiang, T., Xu, Y. et al. Efficient Separation and Extraction of Vanadium and Chromium in High Chromium Vanadium Slag by Selective Two-Stage Roasting–Leaching. Metall Mater Trans B 49, 1471–1481 (2018).

https://doi.org/10.1007/s11663-018-1197-8>

[13] Li, Xs., Xie, B. Extraction of vanadium from high calcium vanadium slag using direct roasting and soda leaching. Int J Miner Metall Mater 19, 595–601 (2012).

https://doi.org/10.1007/s12613-012-0600-8

[14] Lu, G., Zhang, T., Zhang, G. et al. Process and Kinetic Assessment of Vanadium Extraction from Vanadium Slag Using Calcification Roasting and Sodium Carbonate Leaching. JOM 71, 4600–4607 (2019).

https://doi.org/10.1007/s11837-019-03672-9

[15] Xiang, Jy., Wang, X., Pei, Gs. et al. Solid-state reaction of a CaO-V2O5 mixture: A fundamental study for the vanadium extraction process. Int J Miner Metall Mater 28, 1462–1468 (2021).

https://doi.org/10.1007/s12613-020-2136-7>

[16] Du, WT., Jiang, Q., Chen, Z. et al. Experimental Characterization of CO2 and CaCO3 Used in a Pyrometallurgical Vanadium-Extraction Process. JOM 71, 4925–4930 (2019).

https://doi.org/10.1007/s11837-019-03807-y

[17] Podval’naya, N.V., Volkov, V.L. Hydrolytic precipitation of calcium polyvanadates from vanadium(IV) and vanadium(V) solutions. Russ. J. Inorg. Chem. 52, 1468–1473 (2007).

https://doi.org/10.1134/S0036023607090276>

[18] Kurbatova, L.D., Kurbatov, D.I. Extraction recovery of vanadium(V) from sulfuric acid solutions. Russ J Appl Chem 79, 850–852(2006).

https://doi.org/10.1134/S1070427206050302

[19] Hu, B., Chen, B., Zhang, C. et al. Separation and Recovery of Chromium from Solution After Vanadium Precipitation. Mining, Metallurgy & Exploration 38, 289–297 (2021).

https://doi.org/10.1007/s42461-020-00342-2

[20] Zhang, GQ., Zhang, TA., Zhang, Y. et al. Pressure leaching of converter vanadium slag with waste titanium dioxide. Rare Met. 35, 576–580 (2016).

https://doi.org/10.1007/s12598-014-0225-3

[21] Xiang, J., Huang, Q., Lv, X. et al. Effect of Mechanical Activation Treatment on the Recovery of Vanadium from Converter Slag. Metall Mater Trans B 48, 2759–2767 (2017).

https://doi.org/10.1007/s11663-017-1033-6

Published
2022/12/23
How to Cite
Qu, J., Zhang, T., Lv, G., & Chen, Y. (2022). New process for extracting vanadium by direct calcification using the heat of molten vanadium slag. Journal of Mining and Metallurgy, Section B: Metallurgy, 58(3), 355-365. Retrieved from https://aseestant.ceon.rs/index.php/jmm/article/view/35709
Section
Original Scientific Paper