METHODS, SYSTEMS AND APPARATUS FOR PRODUCING ALUMINUM USING CARBON DIOXIDE AS A REACTIVE COVER GAS

Methods, apparatus and systems for protecting molten aluminum-magnesium alloys from oxidation during production processes are provided. The methods generally involve passing a carbon dioxide containing cover gas comprising at least about 5 volumetric percent up to 100 volumetric percent carbon dioxi...

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Bibliographic Details
Main Authors WIESERMAN, LARRY F, WILLIAMS, EDWARD M, KOLEK, PAULA L, DEYOUNG, DAVID H
Format Patent
LanguageEnglish
French
Published 28.08.2008
Subjects
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:Methods, apparatus and systems for protecting molten aluminum-magnesium alloys from oxidation during production processes are provided. The methods generally involve passing a carbon dioxide containing cover gas comprising at least about 5 volumetric percent up to 100 volumetric percent carbon dioxide over one or more surfaces of the molten aluminum-magnesium alloy, thereby forming a protective barrier on the surface of the molten aluminum-magnesium alloy. L'invention concerne des procédés, des systèmes et un appareil permettant de protégér des alliages fondus aluminium/magnésium contre une oxydation pendant des processus de production. Les procédés de l'invention consistent généralement à faire passer un gaz de couverture contenant du dioxyde de carbone et comprenant au moins 5 à 100 % en volume de dioxyde de carbone environ sur au moins une surface de l'alliage fondu aluminium/magnésium, pour former une barrière protectrice à la surface de l'alliage fondu aluminium/magnésium.
Bibliography:Application Number: WO2008US54539