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:
Dec. 06, 1983
Filed:
Jun. 20, 1980
Robert M Kibby, Richmond, VA (US);
Reynolds Metals Company, Richmond, VA (US);
Abstract
A method for extracting aluminum of substantial purity from furnace products resulting from carbothermic reduction of alumina-bearing ores and contaminated with up to about 30 weight percent of aluminum carbide is disclosed. The method involves contacting the furnace product with a high alumina-containing molten slag in the substantial absence of reactive carbon, so as to cause the alumina-containing slag to react with the aluminum carbide, thereby diminishing the aluminum carbide content of the furnace product to the level of 4-10% aluminum carbide by weight. It further involves heating the partially purified furnace product in the absence of both reactive carbon and slag, thereby reacting the self-contained alumina with the aluminum carbide contaminant to produce a purified aluminum.