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. 27, 2002
Filed:
May. 21, 2001
Kai Johansen, Kristiansand, NO;
Jan A. Aune, Langhus, NO;
Other;
Abstract
The present invention relates to a process for carbothermic production of aluminum where molten bath aluminum carbide and aluminum oxide are produced in a low temperature compartment ( ), and continuously flow into a high temperature compartment ( ) where the aluminum carbide is reacted with alumina to produce a top aluminum layer ( ), where the aluminum layer ( ) forms a layer on the top of a molten slag layer and is tapped from the high temperature compartment ( ) at outlet ( ), and where off-gases from the two compartments are treated in reactors fed by one or more columns ( ). According to the invention the low temperature compartment ( ) and the high temperature compartment ( ) are located in a common reaction vessel ( ) where the low temperature compartment is separated from the high temperature compartment by an underflow partition wall ( ). The present invention also includes precipitating and filtering aluminum carbide from the tapped molten aluminum, followed by degassing and casting to form aluminum shapes such as ingots ( ). The present invention further relates to a reactor for production of aluminum by carbothermic reduction of aluminum.