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Russian Journal of Non-Ferrous Metals

, Volume 57, Issue 5, pp 395–404 | Cite as

Optimization and dissolution kinetics of vanadium recovery from LD converter slag in alkaline media

  • S. M. J. Mirazimi
  • F. RashchiEmail author
  • E. Vahidi
  • N. Mostoufi
Metallurgy of Nonferrous Metals

Abstract

Alkaline roasting-alkaline leaching process was used to recover vanadium from LD (Linz Donawitz) converter slag. The independent leaching parameters investigated were liquid to solid ratio (L/S) (10–20 mL/g), temperature (40–60°C), NaOH concentration (1.0–3.0 M), and time (60–120 minutes). Response surface methodology (RSM) was utilized to optimize the leaching parameters and as a result, the most influencing parameter was found to be liquid to solid ratio. Based on the results, the optimum recovery condition (approx. 99%) was obtained with L/S ratio of 20, temperature of 40°C, NaOH concentration of 3.0M, and leaching time of 100 minutes, respectively. Furthermore, the kinetics of alkaline leaching process was investigated using shrinking core model (SCM) equations. It was found that the rate of vanadium leaching is controlled by a mixed controlling mechanism which is comprised of chemical reaction and diffusion through the solid product layer.

Keywords

ld converter slag vanadium alkaline leaching kinetics shrinking core model 

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Copyright information

© Allerton Press, Inc. 2016

Authors and Affiliations

  • S. M. J. Mirazimi
    • 1
  • F. Rashchi
    • 1
    Email author
  • E. Vahidi
    • 2
  • N. Mostoufi
    • 3
  1. 1.School of Metallurgy and Materials Engineering, College of EngineeringUniversity of TehranTehranIran
  2. 2.Ecological Sciences and Engineering Interdisciplinary Graduate ProgramPurdue UniversityWest LafayetteUSA
  3. 3.School of Chemical Engineering, College of EngineeringUniversity of TehranTehranIran

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