Study of the Chemical Interactions Between Iron Phosphides and Iron Silicides

Authors

  • G. M. Serzhanov South Kazakhstan State University named after M. Auezov, Shymkent, Taukekhan av., 5, 160012, Kazakhstan
  • V. M. Shevko South Kazakhstan State University named after M. Auezov, Shymkent, Taukekhan av., 5, 160012, Kazakhstan
  • B. A. Lavrov St. Petersburg State Technological University, St. Petersburg, Moscow avenue, 26, 190013, Russia

DOI:

https://doi.org/10.18321/ectj195

Abstract

This article contains the research results of the thermodynamic modeling of interaction of iron phosphides Fe2P and FeP with FeSi2, obtained by a method of the total thermodynamic analysis on the basis of the program HSC-5.1 of the Finnish metallurgical company Outokumpu, developed on both a principle of the Gibbs energy minimization, and also kinetics of the phosphorus release by ferrosilicon from the electrothermal ferrophosphorus – a by-product of the yellow phosphorus production. It was found, that temperature of the beginning of the phosphorus formation in systems iron phosphides – FeSi2 depends on a mole ratio of phosphorus in the phosphides. At the increasing this ratio from 33.3 to 50%, the temperature of the beginning of the phosphorus formation decreases from 1362 K to 1290 K. At lower temperature (773 K) there is the formation of intermediate FeP2 and FeP in a system Fe2P-FeSi2 and intermediate FeP2 in a system FeP-FeSi2, which react with FeSi2 with temperature increasing and form a gaseous phosphorus. The process proceeds in kinetic mode and is characterized by apparent activation energy of 281-389 kJ/mol.

 

References

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Published

2015-01-20

How to Cite

Serzhanov, G. M., Shevko, V. M., & Lavrov, B. A. (2015). Study of the Chemical Interactions Between Iron Phosphides and Iron Silicides. Eurasian Chemico-Technological Journal, 17(1), 67–74. https://doi.org/10.18321/ectj195

Issue

Vol. 17 No. 1 (2015)

Section

Articles

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