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Some features of heating and melting iron-rich pellets (IRP) by the method of charging the pellets through the axial ducts of electrodes are considered. When using this system of supplying iron ore raw materials through the holes in the electrodes, loose pellets fall into the impact zone of the electric arcs on the melt that ensures a high speed of their fusion. At the same time the technical-and-economic indices of the electrosmelting in the electric arc furnace (EAF) are improved. The use of the fueloxygen burners allow optimizing the IRP melting process im-proving the slagging conditions, heating, metal decarburization with post-combustion of final burning gases (CO, H2, etc.) in the arc furnace.
metallized pellets, electrofusion, electrode, arc fur-nace, gas post-combustion, electric arc burner.
Производство стали в дуговых сталеплавильных печах — современная технология плавки высоко-го уровня [1–2]. Эффективность технологии электроплавки железорудных металлизованных окатышей (ЖМО) в дуго-вой сталеплавильной печи (ДСП) зависит от теплового состояния ванны жидкого металла, метода загрузки и скорости плавления ЖМО в ней, окисленности шлака и металла, степени обезуглероживания расплава [3–5]. Известно приме-нение в реальных производственных условиях плавки ЖМО в ДСП топливно-кислородных горелок (ТКГ) для подачи кислорода, газа и угольной пыли с целью интенсификации процессов шлакообразования, нагрева и обезуглерожива-ния в рабочем пространстве печи [6–8].
1. Henrion, R., Schleimer, F. Perfect electric melting. Iron and Steelmaker, 1982, vol. 9, no. 11, pp. 48-51.
2. Kohiani, T., Kudo, K., Murokami, S. Features and trend in electric steelmaking for new market mills. Transactions of the Iron and Steel Institute of Japan, 1981, no. 10, pp. 431-436.
3. Merker, E.E., Grishin, A.A., Kochetov, A.I. Sposob elektroplavki stali: patent 236009 Ros. Federatsiya. [Steel electrosmelting method.] Patent RF no. 236009, 2009 (in Russian).
4. Sazonov, А.V., Merker, E.E., Chermenev, E.A. Intensifikatsiya plavleniya okatyshey pri ikh zagruzke v zonu vozdeystviya elektricheskoy dugi na shlakovyy rasplav. [Intensification of pellets melting under charging them in the impact zone of the electric arc on the melted slag.] Bulletin “Ferrous Metallurgy”, 2011, no. 8, pp. 62-64 (in Russian).
5. Chermenev, E.A., Merker, E.E., Kobernik, O.P. Ob effektivnosti elektroplavki stali pri zagruzke metallizovannogo syr´ya cherez trubchatye elektrody v vannu dugovoy pechi. [On efficiency of steel electrosmelting when charging metallized raw materials through the tube wires to the arc furnace bath.] Bulletin “Ferrous Metallurgy”, 2013, no. 5, pp. 48-51 (in Russian).
6. Merker, E.E., Sazonov, А.V., Grishin, A.A. Osobennosti tekhnologii elektroplavki okatyshey v dugovoy pechi. [Features of pellet electrosmelting technology in arc furnace.] Izvestia. Ferrous Metallurgy, 2008, no. 2, pp. 31-33 (in Russian).
7. Merker, E.E., Fedina, V.V., Kochetov, A.I. Energosberegayushchiy rezhim plavki okatyshey v 150-t DSP. [Ener-gy-saving mode of pellet melting in 150-t ASF.] Elektrometallurgiya, 2003, no. 9, pp. 43-44 (in Russian).
8. Merker, E.E., Fedina, V.V., Kharlamov, D.A. Elektroplavka okatyshey v dugovoy pechi. [Pellet melting in arc furnace.] Bulletin “Ferrous Metallurgy”, 2004, no. 7, pp. 16-19 (in Russian).
9. Merker, E.E. Stepanov, V.A. Povyshenie energoeffektivnosti elektroplavki stali pri podache okatyshey v DSP che-rez kanaly v elektrodakh. [Improvement in energy efficiency of steel electrosmelting while supplying pellets to ASF through the electrode ducts.] Bulletin “Ferrous Metallurgy”, 2014, no. 1, pp. 41-47 (in Russian).
10. Merker, E.E., Chermenev, E.A. Energosberegayushchie usloviya plavleniya metallizovannykh okatyshey pri ikh podache cherez trubchatye elektrody v vannu dugovoy pechi. [Energy-saving metallized pellet melting conditions when sup-plying them through the electrode ducts to the arc furnace bath.] Stal´, 2015, no. 1, pp. 23-28 (in Russian).
