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The increase of BOF productivity and the new requirements in terms of steel cleanliness require a better understanding of the mechanisms occurring in the converter at blow end and during the metallurgical stirring, and in the ladle, where the slag-metal-atmosphere-deoxidising agents reactions depend on the tapping conditions and also on the slag retention results. In order to achieve this goal two trials campaigns have been performed in the steelshops of SOLLAC Dunkirk and SOLLAC Fos. It is possible after the metallurgical stirring to correlate the slag oxidation degree to the dissolved oxygen content of the metal and to the phosphorus disequilibrium. Moreover the quantity of aluminium to be added at the converter tapping could be expressed as a function of the oxidation degree of the metal and the slag, and of the tapping conditions. A better understanding of the dispersion of the results will be necessary to improve this prediction.

Additional information

Authors: INSTITUT DE RECHERCHES DE LA SIDÉRURGIE FRANÇAISE, Institut de Recherches de la Sidérurgie Française, Saint-Germain-en-Laye (FR);INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE, Institut de Recherches de la Siderurgie Francaise, Saint-Germain-en-Laye (FR)
Bibliographic Reference: EUR 14354 FR (1993) 24 pp., FS, ECU 6
Availability: (2)
ISBN: ISBN 92-826-5111-8
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