Kinetics of extracting magnesium from prefabricated pellets by silicothermic process under flowing argon atmosphere

  • Junhua Guo Northeastern University
  • Da-xue Fu
  • Ji-biao Han
  • Zonghui Ji
  • Zhi-he Dou
  • Ting-an Zhang
Keywords: isothermal kinetics, flowing argon, prefabricated pellet, diffusion, silicothermic process.

Abstract


The Pidgeon process is the main extraction method of magnesium, but its continuous production cannot be achieved due to the switch between vacuum and atmospheric pressure. Therefore, it is vital to realize continuous extraction of magnesium under atmospheric pressure.In the paper, the process of extracting magnesium from prefabricated pellets in flowing argon was proposed. The isothermal kinetic analysis of the reduction process was carried out, the results showed that the reduction process was controlled by diffusion process in 1 h, and the apparent activation energy of extracting magnesium from prefabricated pellets in flowing argon was 218.75 kJ/mol. Then by exploring the influence of experimental factors on the reduction rate, including briquetting pressure, carrier gas flow rate, ferrosilicon content, reaction temperature and time, it is proved that the main control step of diffusion process is silicon diffusion.

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Published
2020/12/30
How to Cite
Guo, J., Fu, D.- xue, Han, J.- biao, Ji, Z., Dou, Z.- he, & Zhang, T.- an. (2020). Kinetics of extracting magnesium from prefabricated pellets by silicothermic process under flowing argon atmosphere . Journal of Mining and Metallurgy, Section B: Metallurgy, 56(3), 379-386. Retrieved from https://aseestant.ceon.rs/index.php/jmm/article/view/27483
Issue
Vol. 56 No. 3 (2020)
Section
Original Scientific Paper

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