Electrometallurgy Today, 2024, №01



2024 №01 (03)

DOI of Article 10.37434/sem2024.01.04

2024 №01 (05)

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Electrometallurgy Today (Sovremennaya Elektrometallurgiya), 2024, #1, 32-39 pages

Application of graphitized cored electrodes in 50 ton steel melting ac arc furnace of DSV-50 type

O.G. Bogachenko¹, A.V. Chernyakov¹, I.O. Goncharov¹, S.G. Kiiko², I.M. Logozinskyi², B.A. Levin², A.G. Fedkov², 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
²PJSC «Dniprospetsstal». 81 Pivdenne Highway Str., 69000, Zaporizhzhia, Ukraine. E-mail: info@dss.com.ua

Abstract
Experimental melts were conducted in 50 ton three-phase AC furnace of DSV-50 type, using graphitized cored electrodes. Low-alloy, high-strength alloy and tool steels of twelve grades were produced. Cores of four compositions were tested (F18, F22, F23 and F27). Melts were conducted in a continuous «melt on melt» mode. It is shown that application of cored electrodes ensured: lowering of specific consumption of graphitized electrodes by 16.1…31.4 %; active power savings by 16.5 %, on average; increase of furnace productivity by 18…27 %; lowering of nitrogen content in steel by 20 %, on average; lowering of alloying element loss (Cr, Ni, V, Mo, etc.) by 8.3…14.7 %; lowering of total loss of charge by 3.5…9.6 %. It is shown that compared to technical-economic characteristics, obtained for DS-6N1 furnace, increase of furnace capacity from 6 to 50 tons did not lower the effectiveness of cored electrode application in AC arc furnaces, i.e. cored graphitized electrodes can be successfully used in arc furnaces of unlimited capacity. 19 Ref., 5 Tabl., 3 Fig.
Keywords: cored electrodes, arc furnaces, electric arc, elongated arcs, power saving

Received: 11.07.2023
Received in revised form: 10.10.2023
Accepted: 05.02.2024

References

1. Yanrui, Wu (2000) The Chinese steel industry: Recent developments and prospects. Resources Policy, 26(3), 171-178. https://doi.org/10.1016/S0301-4207(00)00026-X
2. Guan, X. (2018) Toward resources and processes sustainability. Pt I. JOM, 70, 113-114. https://doi.org/10.1007/s11837-017-2702-2
3. Billings, S.A., Boland, F.M., Nicholson, H. (1979) Electric arc furnace modelling and control. Automatica, 15(2), 137-148. https://doi.org/10.1016/0005-1098(79)90065-7
4. Guo, Z.C., Fu, Z.X. (2010) Current situation of energy consumption and measures taken for energy saving in the iron and steel industry in China. Energy, 35(11), 4356-4360. https://doi.org/10.1016/j.energy.2009.04.008
5. Baumert, J.-C., Thibaut, J.-C., Weiler, C. et al. (2006) Continuous monitoring of graphite electrode wear at the electric arc furnace. Rev. Met. Paris, 103(6), 266-274. https://doi.org/10.1051/metal:2006104
6. Daneshmand, S., Vini, M.H. (2023) Investigation of TiO2/ SiC coating on graphite electrodes for electrical arc furnaces. J. Mater. Eng. and Performance. https://doi.org/10.1007/s11665-023-08230-8
7. Yachikov, I.M., Portnova, I.V., Bystrov, M.V. (2019) Efficiency of application of evaporative cooling of graphite electrodes to reduce their consumption in arc furnaces. Mat. Sci. Forum, 946, 444-449. https://doi.org/10.4028/www.scientific.net/MSF
8. Rafiei, R., Kermanpur, A., Ashrafizadeh, F. (2008) numerical thermal simulation of graphite electrode in EAF during normal operation. Ironmaking & Steelmaking, 35(6), 465-472. https://doi.org/10.1179/174328108X318392
9. Jones, R.T., Reynolds, Q.G., Curr, T.R., Sager, D. (2011) Some myths about DC arc furnaces. J. of the Southern African Institute of Mining and Metallurgy, 111(10), 665-674. http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S2225-62532011001000004&lng=en&tlng=en
10. Pauna, H., Willms, T., Aula, M. et al. (2020) Electric arc length-voltage and conductivity characteristics in a pilot-scale ac electric arc furnace. Metall. Mater. Transact. B, 51, 1646-1655. https://doi.org/10.1007/s11663-020-01859-z
11. Bogachenko, А.G., Mishchenko, D.D., Goncharov, I.O. et al. (2023) Efficiency of using cored graphitized electrodes on electric arc furnaces of direct current. Advances in Materials Sci., 23(1), https://doi.org/10.2478/adms-2023-0006
12. Paton, B.E., Bogachenko, O.G., Kyiko, S.G. et al. (2021) Experience of application of graphitized wick electrodes in industrial steel-making ac furnace. Suchasna Elektrometal., 1, 48-53 [in Ukrainian]. https://doi.org/10.37434/sem2021.01.06
13. Bogachenko, A.G., Sidorenko, L.A., Goncharov I.О. et al. (2023) Technical-economic indiсes of operation of AC steel-making furnace with application of cored electrodes. The Paton welding J., 4, 54-59. https://doi.org/10.37434/tpwj2023.04.07
14. Bogachenko, O.G., Mishchenko, D.D., Honcharov, I.O. et al. (2023) Application of graphitized wick electrodes in DC arc steel furnaces. Suchasna Elektrometal., 1, 53-61 [in Ukrainian]. https://doi.org/10.37434/sem2023.01.07
15. Paton, B.E., Lakomsky, V.I., Galinich, V.I. et al. (2011) Cored electrodes of electric arc furnaces. Chyornye Metally, 5, 13-15 [in Russian].
16. Krikent, N.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 processing of materials: Coll. of Articles and Papers. Kyiv, 135-140 [in Russian].
17. Lakomsky, V.I. (1997) Oxide cathodes of electric arc. PWI, Zaporozhie, Research Center of Plasma Technologies, Society Intern [in Russian].
18. Lakomsky, V.I., Lakomsky, V.V. (2012) Nitrogen in liquid steels and slags. Ed. by B.E. Paton. Kyiv, Naukova Dumka [in Russian].
19. Medovar, L.B., Stovpchenko, G.P., Polishko, G.O. et al. (2018) Modern rail steels and solutions ESR (Review). Information 1: Operating conditions and defects observed. Sovrem. Elektrometall., 1, 3-8 [in Ukrainian]. https://doi.org/10.15407/sem2018.01.01

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