Yuan-yuan Zhu, Ling-yun Yi, Wei Zhao, De-sheng Chen, Hong-xin Zhao,  and Tao Qi, Leaching of vanadium, sodium, and silicon from molten V-Ti-bearing slag obtained from low-grade vanadium-bearing titanomagnetite, Int. J. Miner. Metall. Mater., 23(2016), No. 8, pp. 898-905. https://doi.org/10.1007/s12613-016-1305-1
Cite this article as:
Yuan-yuan Zhu, Ling-yun Yi, Wei Zhao, De-sheng Chen, Hong-xin Zhao,  and Tao Qi, Leaching of vanadium, sodium, and silicon from molten V-Ti-bearing slag obtained from low-grade vanadium-bearing titanomagnetite, Int. J. Miner. Metall. Mater., 23(2016), No. 8, pp. 898-905. https://doi.org/10.1007/s12613-016-1305-1

Leaching of vanadium, sodium, and silicon from molten V-Ti-bearing slag obtained from low-grade vanadium-bearing titanomagnetite

+ Author Affiliations
  • Corresponding authors:

    De-sheng Chen    E-mail: dshchen@ipe.ac.cn

    Tao Qi    E-mail: tqgreen@ipe.ac.cn

  • Received: 11 November 2015Revised: 21 January 2016Accepted: 25 January 2016
  • The water leaching process of vanadium, sodium, and silicon from molten vanadium-titanium-bearing (V-Ti-bearing) slag obtained from low-grade vanadium-bearing titanomagnetite was investigated systematically. The results show that calcium titanate, sodium aluminosilicate, sodium oxide, silicon dioxide and sodium vanadate are the major components of the molten V-Ti-bearing slag. The experimental results indicate that the liquid-solid (L/S) mass ratio significantly affects the leaching process because of the respective solubilities and diffusion rates of the components. A total of 83.8% of vanadium, 72.8% of sodium, and 16.1% of silicon can be leached out via a triple counter-current leaching process under the optimal conditions of a particle size below 0.074 mm, a temperature of 90°C, a leaching time of 20 min, an L/S mass ratio of 4:1, and a stirring speed of 300 r/min. The kinetics of vanadium leaching is well described by an internal diffusion-controlled model and the apparent activation energy is 11.1 kJ/mol. The leaching mechanism of vanadium was also analyzed.
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