Vanadium Leaching Kinetics from Calcification-Roasted Vanadium Slag in Ammonium Carbonate

Ammonium carbonate leaching method is a new selective vanadium leaching method. Studying the leaching kinetics of vanadium in ammonium carbonate solution will promote the industrial application of this method. In this work, using different leaching conditions, the variations of vanadium leaching eff...

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Bibliographic Details
Published in:Journal of sustainable metallurgy 2023-12, Vol.9 (4), p.1810-1819
Main Authors: Cheng, Jie, Li, Hong-Yi, Wei, Cheng-Chao, Chen, Xin-Mian, Diao, Jiang, Xie, Bing
Format: Article
Language:English
Subjects:
Ammonium compounds
Calcification
Chemical reactions
Diffusion layers
Diffusion rate
Earth and Environmental Science
Environment
Industrial applications
Kinetics
Leaching
Mass transfer
Metallic Materials
Research Article
Shrinking core model
Sustainable Development
Vanadium
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Summary:Ammonium carbonate leaching method is a new selective vanadium leaching method. Studying the leaching kinetics of vanadium in ammonium carbonate solution will promote the industrial application of this method. In this work, using different leaching conditions, the variations of vanadium leaching efficiency with leaching time were studied to elucidate the leaching kinetics of vanadium. It was concluded that the leaching process consists of two stages and both of which complied with shrinking core model (SCM). The apparent activation energies ( E a) of leaching process were 8.80 kJ/mol (0–15 min) and 9.68 kJ/mol (15–70 min), respectively. Results indicated the leaching rate in 0–15 min was controlled by solid product layer diffusion and the leaching rate in 15–70 min was controlled by solid product layer diffusion and chemical reactions, and diffusion control played a significant role. Therefore, it is necessary to accelerate the mass transfer in the entire leaching process. Graphical Abstract
ISSN:2199-3823
2199-3831
DOI:10.1007/s40831-023-00767-1