Journals →  Chernye Metally →  2014 →  #7 →  Back

Iron and Steelmaking
ArticleName New plasma-heated ladle furnace for secondary metallurgical tasks at Dorrenberg Edelstahl
ArticleAuthor M. Kühnemund, A. Hauck, W. Schmitz

Dörrenberg Edelstahl GmbH (Engelkirchen, Germany):

Kühnemund M., Mag. Eng.


Induga GmbH & Co. KG (Simmerath, Germany):

Hauck A., Dr. Eng.


Otto Junker GmbH (Simmerath, Germany):

Schmitz W., Dr. Eng., e-mail:


Secondary metallurgical treatment of molten steel in the ladle has been state of the art for a long time. In order to compensate temperature losses during such treatment steps or to be able to obtain the required pouring temperature precisely, many ladle treatment stations are provided with a heating capability which in most cases is three-phase electric arc heating. The present paper describes the successful use of plasma heating as an alternative heating method offering essential advantages especially for small treatment units. Another outstanding technical benefit is that it eliminates the time-related carburization effect that is an inevitable characteristic of conventional ladle heating systems. It is shown that with the new plasma ladle furnace, the process steps can be shortened and the product quality can be improved at Dörrenberg Edelstahl, success was also achieved in rising the efficiency of technological process. Mechanical and electrical equipment of the works is described, technological routes for proposed and conventional scheme are compared. It is evident that plasma technology has substantial advantages comparing with threephase electric arc furnaces, especially for the ladles with relatively small volume. Therefore, it should be very interesting for small-size shops manufacturing special steels, as well as for more and more frequently erected micro-mills with melting in induction furnaces.

keywords Electric steel making, ladle furnaces, plasma heating, carburization, micro-mills, secondary metallurgy, special steels

1. Stolte, G.: Secondary Metallurgy, Verlag Stahleisen GmbH, Düsseldorf, 2002.
2. Gudenau, H. W. et al.: Materialsammlung zum Praktikum Metallurgie, Inst. f. Eisenhüttenkunde, RWTH Aachen, Aachen, 5. Aufl. 2002.
3. Bebber, H.; Kranz, A.: elektrowärme int. 60 (2002) Nr. 2, S. 55/60.
4. Neuschütz, D.; Bebber, H.: stahl u. eisen 112 (1992) Nr. 12, S. 89/97.
5. Bebber, H.: Steel Times Int. 20 (1996) Nr. 3, S. 46/48.
6. Neuschütz, D.; Stadler, P.; Bebber, H.: Plasmaheating in steelmaking, 4th European Congress on Thermal Plasma Processes (TPP4), 15.–18. Juli 1996, Athen, Griechenland.
7. Stadler, P.; Neuschütz, D.; Bebber, H.: Graphite-based plasma tundish heating, Thermotec 97, 19. Juni 1997, Tokio, Japan.

Language of full-text russian
Full content Buy