OPTIMIZATION OF ARGON INJECTION AND REFRA CTORIES AT SOLLAC-DUNKERQUE

Steelmaking processes make continuous progress with respect to cleanli ness and reduction of nitrogen contents. At Sollac Dunkerque, measures have been taken in order to optimize the continuous casting refractor ies, to prevent reoxidations and to improve the technology of argon in jection. It has so become possible to reduce by 70% the nitrogen picku p between ladle and tundish and by 50% the number of incidents on slab s.