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2021 №01 (05) DOI of Article
10.37434/sem2021.01.06
2021 №01 (01)

Electrometallurgy Today 2021 #01
SEM, 2021, #1, 48-53 pages

Experience of application of graphitized wick electrodes in industrial steel-making AC furnace

Authors
B.E. Paton1, O.G. Bogachenko1, S.G. Kyiko2, I.M. Logozinskiy2, O.P. Lyutiy2, K.M. Gorban2
1E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua 2PrJSC «Dniprospetsstal». 81 Pivdenne Rd., 69000, Zaporizhzhya, Ukraine. E-mail:info@dss.com.ua

Abstract
Several series of test melts (more than 60) with application of graphitized composite (wick) electrodes of EGK (G) type developed at PWI were successfully conducted for the first time in the world in an industrial three-phase AC arc steel-making furnace of DS-6N1 type at «Dniprospetsstal» plant. It is shown that the wick arc differs in principle by its geometrical and energy parameters from an arc of regular (monolithic) electrode. The wick arc is dispersed, spatially steady, it is characterized by a high stability in a broad range of lengths and electric modes. It is particularly important during formation of wells and charge melting. Wick electrode (depending on its composition) ensures 2...5 shortening of the time from the first short-circuit to steady burning of the arc, compared to a monolithic electrode, 2…4 times reduction of the harmonic factor; power saving by 6...10 %; increase of furnace capacity by 12...23 %, etc. The need and good prospects for continuation of studies of the energy, technological and metallurgical features of operation of AC arc steel-making furnaces with wick electrodes is emphasized. These electrodes improve practically all the technical and economic characteristics of furnace operation, while providing the possibility of controlling the highcurrent arcs and their high stability. Ref. 5, Tabl. 2, Fig. 4.
Keywords: graphitized composite (wick) electrodes; electric arc, arc steel-making furnaces; short-circuiting; harmonic factors; power saving; furnace capacity

Received 08.02.2021

References

1. Paton, B.E., Lakomsky, V.I., Galinich, V.I., Mishchenko, D.D. (2011) Cored electrodes of electric arc furnaces. Chyornye Meetally, 5, 13–15 [in Russian].
2. Bogachenko, A.G., Mishchenko, D.D., Braginets, V.I. et al. (2016) Saving of electric power at the arc steel melting furnaces of direct current with graphitized cored electrodes. Sovrem. Elektrometall., 1, 58-64 [in Russian]. https://doi.org/10.15407/sem2016.01.09
3. Fialkov, A.S. (1977) Carbon, interlayer compounds and composite on its base. Moscow, Aspekt press [in Russian].
4. Lakomsky, V.I. (1997) Oxide cathodes of electric arc. Zaporozhie, Internal [in Russian].
5. Krikent, I.V., Krivtsun, I.V., Demchenko, V.F. et al. (2018) Numerical modeling of high-current arc discharge in dc ladle– furnace installation. In: Physical processes in welding and metal working: Collect. of articles and reports. Kiev, 135–140 [in Russian].

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