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:
Oct. 15, 1991
Filed:
Aug. 31, 1989
Applicant:
Inventor:
Vishu D Dosaj, Midland, MI (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F27D / ;
U.S. Cl.
CPC ...
373 18 ; 373 75 ;
Abstract
The instant invention relates to the use of hollow silicon carbide beams as refractory in substantially closed open-arc furnaces used for the carbothermic reduction of metal oxides. The silicon carbide beams are used in areas of the furnace which are exposed to temperatures higher than those tolerated by standard refractories, said areas requiring, in addition, stability to oxidation and reduction type chemical reactions and sufficient electrical resistance to minimize arcing from the exposed electrode. In addition, the invention relates to the use of silicon carbide beams in a two-stage, open-arc furnace for the carbothermic reduction of silicon dioxide to silicon metal.