Gaseous based desulfurization of alloys
AssigneeUnited Technologies Corporation
InventorsMario P. Bochiechio, John Joseph Marcin, Kirk C. Newton, Michael A. Kmetz
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Abstract
A method for desulfurizing a metal alloy comprises heating the metal alloy to a molten state. A gaseous desulfurizing compound is bubbled through the molten alloy to form a solid sulfur-containing waste phase and a molten reduced-sulfur alloy phase. The solid waste phase and the molten reduced-sulfur alloy phase are separated. The gaseous desulfurizing compound includes a constituent element selected from the group: alkali metals, alkaline earth metals, and rare earth metals.
Claims30
A method for desulfurizing a metal alloy, the method comprising:
- heating the metal alloy to a molten state;
- bubbling a gaseous desulfurizing compound through the molten alloy to form a solid sulfur-containing waste phase and a molten reduced-sulfur alloy phase, the gaseous desulfurizing compound including a constituent element selected from the group:
- alkali metals, alkaline earth metals, and rare earth metals;
- and
- separating the solid sulfur-containing waste phase and the molten reduced-sulfur alloy phase.
A method for casting an article, the method comprising:
- introducing a gaseous desulfurizing compound into a casting vessel containing a molten alloy;
- bubbling the gaseous desulfurizing compound through the molten alloy to form a solid sulfur-containing waste phase and a molten reduced-sulfur alloy phase;
- the gaseous desulfurizing compound including at least one constituent selected from the group:
- alkali metals, alkaline earth metals, and rare earth metals;
- separating the solid sulfur-containing waste phase and the molten reduced-sulfur alloy phase;
- and
- solidifying at least a portion of the reduced-sulfur alloy phase to form the cast article.
Dependencies are inferred from the claim text.