Journals →  Chernye Metally →  2017 →  #5 →  Back

Steel making
ArticleName Kinetic features of desulphurization process during steel melting in induction crucible furnace
ArticleAuthor N. K. Tursunov, A. E. Semin, G. I. Kotelnikov
ArticleAuthorData

National University of Science and Technology “MISiS” (Moscow, Russia):

Tursunov N. K., Post-Graduate, u_nadir@mail.ru
Semin A. E., Dr. Eng., Prof., Deputy Head of the Chair “Metallurgy of Steel and Ferroalloys”, asemin2007@yandex.ru
Kotelnikov G. I., Cand. Eng., Associate Prof., Chair “Metallurgy of Steel and Ferroalloys”, gikotelnikov@yandex.ru

Abstract

Desulphurization process of 20GL steel in induction crucible furnace with capacity of 6 tones and using solid slag-forming mixtures has been analyzed. Reduction of the height of the bath metal meniscus has been provided by increase of the level of liquid metal in the crucible. Oxidation of the melt, having the eff ect on steel desulphurization process has been evaluated by the residual content of such elements as silicon, manganese, aluminum and complex deoxidizers. The conditions of industrial experiments usually are limited by time and other reasons, thereby it is not possible to achieve equilibrium values of suplhur distribution between slag and metal. It is shown that variation of metal oxidation, slag composition and increase of the contact surface between metal and slag phases make it possible to lower sulphur content in the metal in induction crucible furnace. It was revealed that to lower sulphur content from 0.033 to 0.015% we need to hold metal under slag in this furnace not less than 1620–1800 s at 1650 °C. According to the experimental data obtained in semi-industrial conditions, the kinetic parameters of steel desulphurization process in induction crucible furnace have been established and compared with the kinetic features of this process in different equipment.

keywords Process kinetics, induction crucible furnace, steel desulphurization, slag-forming mixtures, eff ective mass transfer coeffi cient, oxidation
References

1. Bornatskiy I. I. Steel desulfurizing. Moscow : Metallurgiya, 1970. 320 p.
2. Itskovich G. M. Deoxidation of steel and modification of non-metallic inclusions. Moscow : Metallurgiya, 1981. 296 p.
3. Belyanchikov L. N. Evaluation of level of contents of harmful admixtures in metal according to their influence on its service properties. Elektrometallurgiya. 2005. No. 6. pp. 20–28.
4. Novikov V. A., Tsarev V. A., Novikov S. V. et al. Thermodynamic and kinetic peculiarities of desulfurizing process. Elektrometallurgiya. 2009. No. 12. pp. 16–20.
5. Nakonechnyy A. Ya., Urantsev V. N., Sinyakov R. V. et al. Metal desulfurization with manganese in process of direct alloying. Elektrometallurgiya. 2009. No. 12. pp. 2–8.
6. Smirnov N. A. Optimization of technology for desulfurization of steel in plant of ladle furnace. Elektrometallurgiya. 2004. No. 1. pp. 20–28.
7. Trukhov A. P., Malyarov A. I. Casting alloys and smelting. Moscow, 2004. 311 p.
8. Shapovalov A. N. Theory of metallurgical processes : tutorial. Novotroitsk : NF NITU «MISiS», 2015. 91 p.
9. Ayzatulov R. S., Kharlashin P. S., Protopopov E. V. et al. Theoretical basis of steelmaking processes. Moscow, 2002. 320 p.
10. Turkdogan E. T., Martonik L. J. Transactions of the Iron and Steel Institute of Japan. 1983. Vol. 23, No. 12. pp. 1038–1045.
11. Niwa К., Yakokava Т. Chemical Metallurgy of Iron and Steel. London, 1971. pp. 77–81.
12. Bakhtina G. D. Diff usion. Kinetics of heterogeneous processes. Volgograd : Volgogradskiy gosudarstvennyy tekhnicheskiy universitet, 2011. 28 p.
13. Povolotskiy D. Ya., Roshchin V. E., Malkov N. V. Electrometallurgy of steel and ferroalloys : tutorial for universities. Third edition, revised and enlarged. Moscow : Metallurgiya, 1995. 592 p.
14. Grigoryan V. A., Stomakhin A. Ya., Utochkin Yu. I. et al. Physical and chemical calculations of electric and steelmaking processes : collection of tasks with solutions. Second edition, revised and enlarged. Moscow : MISiS, 2007. 318 p.
15. Semin A. E., Alpatov A. V., Kotelnikov G. I. Modern problems of metallurgy and material science. Practicum. Moscow : Izdatelskiy dom MISiS, 2015. 56 p.
16. Balkovoy Yu. V., Aleev R. A., Bakanov V. K. Parameters of the first order interaction in iron-based melts : review information. Moscow : Chermetinformatsiya. 1987. 42 p.
17. Buzek Z. Hutnicke listy. 1979. Vol. 34, No. 10. pp. 699–704.
18. Sigworth G. K. Elliot J. F. Metal Science Journal. 1974. Vol. 8, No. 9. pp. 298–310.
19. Buzek Z. Hutnicke listy. 1984. Vol. 39, No. 11. pp. 764–769.
20. Fruehan R. J. Physical chemistry and process dynamics of reactions in ladle metallurgy. Journal of Metals. 1985 March. pp. 50–54.

Language of full-text russian
Full content Buy
Back