C - Chemistry – Metallurgy – 21 – C
Patent
C - Chemistry, Metallurgy
21
C
C21C 7/00 (2006.01) C21C 5/52 (2006.01) C21C 5/54 (2006.01)
Patent
CA 2727187
1. Process for producing a foamed slag. 2.1 The invention is directed to a process for producing a foamed slag on austenitic stainless melts in an electric are furnace, wherein a mixture of metal oxides and carbon is introduced into the furnace, the metal oxide is reduced by the carbon below the slag at the metal/slag interface, and the resulting gases bring about the foaming of the slag by bubble formation. 2.2 The mixture to be charged, which is added in the form of preforms such as briquets or pellets, contains iron oxide, iron carriers, carbon and the required binders in addition to nickel oxide.
L'invention concerne un procédé de formation de scories moussées sur des bains de fusion d'acier inoxydable austénitique dans un four à arc électrique, dans lequel un mélange d'oxydes métalliques et de carbone est introduit dans le four en dessous des scories, à la limite entre le métal et les scories, l'oxyde métallique est réduit par le carbone et les gaz dégagés ont pour effet le moussage des scories par formation de bulles. Le mélange à charger, qui est ajouté sous la forme de pièces moulées, par exemple des briquettes ou des pastilles, contient outre de l'oxyde de nickel de l'oxyde de fer, des supports de fer et de carbone et les liants nécessaires.
Reichel Johann
Rose Lutz
Fetherstonhaugh & Co.
Sms Siemag Aktiengesellschaft
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