Production process of stainless steel by means of a converter

C - Chemistry – Metallurgy – 21 – C

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C21C 5/28 (2006.01) C21C 5/00 (2006.01) C21C 5/34 (2006.01)

Patent

CA 1098321

ABREGE DESCRIPTIF Procédé d'élaboration, au convertisseur, d'acier inoxy- dable, dans lequel on insuffle, à l'aide d'au moins une tuyère comportant au moins deux circuits coaxiaux indépendants, un gaz d'affinage oxydant dans le bain métallique par le conduit central de la tuyère et de l'argon liquide par le circuit périphérique. Le gaz oxydant est, au début de l'affinage, de l'oxygène pur, en- suite il est dilué par de l'argon gazeux. Ce procédé trouve son application dans l'élaboration d'aciers inoxydables, notamment à très basses teneurs en carbone, et permet d'augmenter la durée de vie des tuyères et des garnissages réfractaires du convertisseur.

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