C - Chemistry – Metallurgy – 21 – C
Patent
C - Chemistry, Metallurgy
21
C
C21C 7/00 (2006.01) C04B 5/06 (2006.01) C21B 3/06 (2006.01) C21C 5/36 (2006.01) C22B 7/04 (2006.01)
Patent
CA 2398344
In a method for treating slags or slag mixtures having iron oxide contents of > 5 wt.%, in particular steelworks slags, in which the steel slags optionally mixed with other slags are charged onto a metal bath, a steel bath having a carbon content of < 1.5 wt.%, preferably < 0.5 wt.%, is used as the metal bath and the steel bath, after the charging of the steel slags, is carburized to above 2.0 wt.% C, preferably > 2.5 wt.% C, by introducing carbon or carbon carriers.
L'invention concerne un procédé permettant de traiter des laitiers ou des mélanges de laitiers à teneur en oxyde de fer > 5 % en poids, notamment des scories d'aciérie. Selon ce procédé, les scories d'acier sont placées sur un bain métallique, éventuellement mélangées à d'autres laitiers. Le bain métallique utilisé est un bain d'acier à teneur en C < 1,5 % en poids, de préférence < 0,5 % en poids. Après chargement des scories d'acier, le bain d'acier est carburé par introduction de carbone ou de supports de carbone, ce qui porte la teneur en C à plus de 2,0 % en poids.
Holcim Ltd.
Holcim Technology Ltd.
Marks & Clerk
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