Abstract
To extract vanadium in an environment friendly manner, this study focuses on the process of leaching vanadium from vanadium slag by high pressure oxidative acid leaching. Characterizations of the raw slag, mineralogy transformation, and the form of leach residues were made by X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy. The result shows that the vanadium slag is composed of major phases of fayalite, titanomagnetite, and spinel. During the high pressure oxidative acid leaching process, the fayalite and spinel phases are gradually decomposed by sulfuric acid, causing the release of vanadium and iron in the solution. Meanwhile, unreacted silicon and titanium are enriched in the leach residues. With the initial concentration of sulfuric acid at 250 g·L−1, a leaching temperature of 140°C, a leaching time of 50 min, a liquid-solid ratio of 10:1 mL·g−1, and oxygen pressure at 0.2 MPa, the leaching rate of vanadium reaches 97.69%.
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X.S. Li and B. Xie, Extraction of vanadium from high calcium vanadium slag using direct roasting and soda leaching, Int. J. Miner. Metall. Mater., 19(2012), No. 7, p. 595.
F. Wang, Y.M. Zhang, J. Huang, T. Liu, Y. Wang, X. Yang, and J. Zhao, Mechanisms of aid-leaching reagent calcium fluoride in the extracting vanadium processes from stone coal, Rare Met., 32(2013), No. 1, p. 57.
M.T. Li, C. Wei, G. Fan, C.X. Li, Z.G. Deng, and X.B. Li, Extraction of vanadium from black shale using pressure acid leaching, Hydrometallurgy, 98(2009), No. 3–4, p. 308.
D.S. He, Q.M. Feng, G.F. Zhang, L.M. Ou, and Y.P. Lu, An environmentally-friendly technology of vanadium extraction from stone coal, Miner. Eng., 20(2007), No. 12, p. 1184.
B. Liu, H. Du, S.N. Wang, Y. Zhang, S.L. Zheng, L.J. Li, and D.H. Chen, A novel method to extract vanadium and chromium from vanadium slag using molten NaOH-NaNO3 binary system, AIChE J., 59(2013), No. 2, p. 541.
S.M.J. Mirazimi, F. Rashchi, and M. Saba, Vanadium removal from roasted LD converter slag: optimization of parameters by response surface methodology (RSM), Sep. Purif. Technol., 116(2013), p. 175.
M.Y. Wang, L.S, Xiao, Q.G. Li, X.W. Wang, and X.Y. Xiang, Leaching of vanadium from stone coal with sulfuric acid, Rare Met., 28(2009), No. 1, p. 1.
T.J. Chen, Y.M. Zhang, and S.X. Song, Improved extraction of vanadium from a Chinese vanadium-bearing stone coal using a modified roast-leach process, Asia-Pac. J. Chem. Eng., 5(2010), No. 5, p. 778.
X.Y. Zou, Q.J. Peng, Y.Z. Ouyang, and R.G. Tian, Research on the roasting process with calcium compounds for silica based vanadium ore, Chin. J. Process Eng., 1(2001), No. 2, p. 189.
Z.Y. Bin, Study on Extraction of V2O5 from Vanadium ore by roasting and acid leaching process, Iron Steel Vanadium Titanium, 27(2006), No. 1, p. 21.
X.J. Zhou, C. Wei, M.T. Li, S. Qiu, and X.B. Li, Thermodynamics of vanadium-sulfur-water systems at 298 K, Hydrometallurgy, 106(2011), No. 1–2, p. 104.
X.S. Li, B. Xie, G.E. Wang, and X.J. Li, Oxidation process of low-grade vanadium slag in presence of Na2CO3, Trans. Nonferrous Met. Soc. China, 21(2011), No. 8, p. 1860.
Y.J. Hu, Y.M. Zhang, S.X. Bao, and T. Liu, Effects of the mineral phase and valence of vanadium on vanadium extraction from stone coal, Int. J. Miner. Metall. Mater., 19(2012), No. 10. p. 893.
W.Z. Mu, T.A. Zhang, Z.H. Dou, G.Z. Lü, and Y. Liu, φ-pH diagram of V-Ti-H2O system during pressure acid leaching of converter slag containing vanadium and titanium, Trans. Nonferrous Met. Soc. China, 21(2011), No. 9, p. 2078.
T.A. Zhang, W.Z. Mu, Z.H. Dou, G.Z. Lü, Y. Liu, Q.Y. Zhao, and J.C. He, A Hydrometallurgy Method for Extraction the Vanadium from the Converter Slag Containing Vanadium and Titanium, Chinese Patent, Appl.201010514573.8, 2010.
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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
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DOI: https://doi.org/10.1007/s12613-015-1038-6