Badische Stahl-Engineering GmbH (Kehl, Germany):

Grosse A., Dr.
Libera K.
Opfermann A., Dr.
Schweikle R.
Buls S.

E-mail (common): info@bse-kehl.de

Badische Stahlwerke GmbH (Kehl, Germany):
Volkert A.
Wohlfahrt S.

Two electric arc furnaces operate at BSW works in Kehl. Most part of their equipment have been developed by the scientific and research center of Badische Stahl Engineering (BSE). Now the specialists of this center have concluded about expedience of combining the advantages of conventional burners and positive factors of the new side burners with virtual flame. In this way tiltable burners have been designed. BSE developed a tiltable VLB in order to combine the best and most efficient angle for burner mode with the optimum angle for supersonic oxygen injection. Due to the infinite angle admissions from 20° to 40° scrap heating and melting with burner mode shall be further optimized to reduce electrical energy consumption. Additionally the refractory wear underneath the burners shall be further mitigated with the new tilting function. Special attention had to be given to the sealing between the tiltable copper box and the holding frame. Therefore BSE developed a new sealing concept for this application which was patented in 2013. After several functional tests at BSW EAF No. 2 the new tiltable VLB has proven its functions and availability in the rough meltshop environment with promising results. In 2014 BSE received the first order for the installation of the tiltable VLB at Stahl Gerlafingen. The commissioning of the system took place in January 2015 and promising results were obtained. Additionally two tiltable VLB were installed at BSW EAF No. 1 in February 2015. The next steps will be now to conduct further optimization tests with the new VLB to utilize the full potential of this unique burner design.

1. Toulouevski, Y. N.; Zinurov, I. Y.: Innovation in Electric Arc Furnaces, Springer-Verlag, Berlin and Heidelberg, 2010, p. 118.
2. Grosse, A.; Opfermann, A.; Libera, K.; Gökce, F.; Schweikle. R.; Volkert, A.: The next generation of chemical energy application of Badische, Proc. AISTechConf., 5 – 8 May 2014, Indianapolis, USA.
3. http://www.stahl-gerlafingen.com/DE/LinkClick.aspx?fileticket=HvWlzBtZS4w%3D&tabid=240&language=de-CH.