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:
Mar. 21, 1995
Filed:
Feb. 23, 1994
Joe W Cochran, Palm Harbor, FL (US);
S Frank Kirkconnell, St. Petersburg, FL (US);
Electric Power Research Institute, Palo Alto, CA (US);
Abstract
A method for beneficiating particles of fly ash containing carbon which includes the following steps. The particles of fly ash are introduced into a dry bubbling fluid bed and air is supplied thereto. The fluid bed is operated at a temperature ranging from approximately 800.degree. to 1300.degree. F., during which the air intimately mixes with the particles of fly ash and oxidizes the carbon therein. The beneficiated particles of fly ash are then removed from the fluid bed. The carbon reduction in the particles of fly ash permits these particles to be used as pozzolan to replace a portion of the cement in concrete. An apparatus is provided for performing the method of the invention.