The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 31, 2010
Filed:
Feb. 22, 2008
Dawn Corleen Chesonis, Avonmore, PA (US);
David H. Deyoung, Export, PA (US);
Dawn Corleen Chesonis, Avonmore, PA (US);
David H. DeYoung, Export, PA (US);
Alcoa Inc., Pittsburgh, PA (US);
Abstract
An in-line deep box treatment of molten metal wherein, instead of gaseous Cl, a solid salt reactant containing a halide salt (e.g., MgCl) as one of its components may be injected into the molten metal along with an inert gas (typically argon) through the existing degasser impellor. The salt flux may be metered into the inert gas stream at a controlled rate. A salt injector flux tank may be retrofitted to current rotary degassing equipments without requiring a specialized rotor design or changes in the degasser unit design. Using the halide salt-based solid flux, the benefits of alkali, alkaline earth, and inclusion removal may be achieved without the industrial hygiene, environmental, and safety issues associated with storing and using the gaseous and hazardous Clduring molten metal degassing.