A Novel Method of Leaching Vanadium from Extracted Vanadium Residue Using Sodium Sub-Molten Salt Medium

Abstract:

Leaching of an extracted vanadium residue in sodium sub-molten salt medium was investigated. The significant effects of reaction temperature, particle size of residue, reaction time and NaOH-to-residue mass ratio on vanadium extraction were studied. By the orthogonal experiment study, it can be concluded that the impact order of factors is Tr> t>R according to the significance to the leaching process. Under conditions of reaction temperature 170°C, NaOH-to-residue 4:1, stirring speed 700 rpm, particle size -74 µm and reaction time around 180 min, leaching efficiency of vanadium obtained is higher than 90%. And, the leaching process of vanadium, with activation energy 27.69 kJ•mol-1, is controlled by the chemical reaction-controlled as the following rate equation. ln(1-x)=-kt

• Periodical: Advanced Materials Research (Volume 402)
• Pages: 253-260
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.402.253
• Online since: November 2011
• Authors: Lan Jie Li, Shi Li Zheng, Dong Hui Chen, Shao Na Wang, Hao Du, Ming Lei Gao, Yi Zhang
• Keywords: Extracted Vanadium Residue, Sub-Molten Salt, Vanadium

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