Advertisement

Russian Metallurgy (Metally)

, Volume 2019, Issue 11, pp 1178–1183 | Cite as

Influence of Sulfur on the Plasma Decarburization and Desulfurization of Corrosion-Resistant Steels

  • K. V. GrigorovichEmail author
  • O. A. Komolova
  • B. A. Rumyantsev
Article
  • 1 Downloads

Abstract

Analysis of the kinetics of the processes occurring in the area of interaction between a plasma torch and Fe–Cr–S, Fe–Cr–Ni–S melts has been based on the influence of sulfur on the decarburization and desulfurization upon treatment of the melts by oxidizing plasma. The kinetic parameters of the plasma decarburization of high-chromium melts is determined, and the influence of the partial oxygen pressure in a plasma-forming gas and the sulfur content in a metal is established. At a low sulfur content in a metal in melting of Fe–Cr–S, Fe–Cr–Ni–S alloys in argon plasma, the limiting stage of desulfurization is found to be either sulfur evaporation in a plasma spot or its diffusion from the melt volume to the interface. Both processes are described by first-order equations. During treatment of a melt by an oxygen-containing plasma, sulfur is mainly removed due to the formation of gaseous oxides. At a high sulfur content in a melt, desulfurization takes place in the sorption kinetic mode. Under these conditions, the process rate decreases and the reaction can approach the second order. At increase in oxygen content in a plasma-forming gas intensifies decarburization and desulfurization; however, the rate constant is mainly determined by the initial sulfur content in a metal and, then, by the partial oxygen pressure in the gaseous phase.

Keywords:

corrosion-resistant steel decarburization desulfurization plasma kinetics 

Notes

FUNDING

This work was supported by the Russian Foundation for Basic Research, project no. 18-29-24146 mk.

REFERENCES

  1. 1.
    A. P. Gulyaev, Pure Steel (Metallurgiya, Moscow, 1975).Google Scholar
  2. 2.
    A. Yu. Polyakov, Theoretical Fundamentals of Steel Making Furnace Refinement (Nauka, Moscow, 1975).Google Scholar
  3. 3.
    V. S. Cherednichenko, M. G. Kuz’min, and A. S. An’shakov, “Plasma facilities for melting and reduction of metals,” Elektrometallurgiya, No. 9, 20–27 (2009).Google Scholar
  4. 4.
    V. S. Rimkevich, A. A. Sisev, S. V. Muruev, and M. V. Blokhin, “Possibilities of improvement of conventional melting of stainless steels,” Chern. Metall., Byull. Nauchno-Tekh. Ekon. Inf., No. 8, 23–28 (2012).Google Scholar
  5. 5.
    G. Vil’gel’mi, “Heat engineering specifications of plasma process,” Chern. Met., No. 224, 56–62 (1985).Google Scholar
  6. 6.
    D. I. Borodin, Theory and Practice of Steel Quality Improvements (Metallurgiya, Moscow, 1985).Google Scholar
  7. 7.
    S. N. Paderin and S. I. Filippov, “The influence of blockage of reactive surface on decarburization intensity of metal melts,” Izv. Vyssh. Uchebn. Zaved., Chern. Metall., No. 11, 12–17 (1971).Google Scholar
  8. 8.
    T. Peprica and J. Skala, “Studium kinetiky oduhliceni taveniny Fe–C–S plynnou smesi,” Kovove Mater., No. 27, 647–661 (1989).Google Scholar
  9. 9.
    J. K. Rao and H. G. Lee, “Decarburization and nitrogen absorption in molten Fe-C-alloys,” Exp. Iron. Steel., No. 15, 228–237 (1988).Google Scholar
  10. 10.
    O. G. Salieva, S. I. Gubenko, and Yu. V. Tsvetkov, “Physicochemical fundamentals of metallurgical processes,” in Proceedings of the 10th All-Union Conference (Chermetinformatsiya, Moscow, 1991), Vol. 2, pp. 81–84.Google Scholar
  11. 11.
    N. N. Drozdov, V. T. Burtsev, and S. I. Filippov, “Studying mechanism and kinetics of sulfur evaporation by drop weight method,” Izv. Vyssh. Uchebn. Zaved., Chern. Metall., No. 5, 22–24 (1977).Google Scholar
  12. 12.
    V. A. Rumyantsev, O. A. Komolova, K. V. Grigorovich, and A. K. Garber, “Studying evaporation of components of reactive area upon treatment of chromium containing melts by low temperature plasma,” Izv. Vyssh. Uchebn. Zaved., Chern. Metall., No. 11, 821–826 (2016).Google Scholar
  13. 13.
    A. A. Erokhin, Regularities of Plasma Arc Alloying and Refining of Metals (Nauka, Moscow, 1984).Google Scholar

Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • K. V. Grigorovich
    • 1
    Email author
  • O. A. Komolova
    • 1
  • B. A. Rumyantsev
    • 1
  1. 1.Baikov Institute of Metallurgy and Materials Science, Russian Academy of SciencesMoscowRussia

Personalised recommendations