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. 09, 2001
Filed:
Dec. 23, 1997
John R. McWhirter, Boalsburg, PA (US);
James L. Stanton, Fairport, NY (US);
Paul M. Kubera, Webster, NY (US);
General Signal Corporation, Muskegon, MI (US);
Abstract
A biochemical oxidation system and process is disclosed for the removal of insoluble sulfides from metal ores. A liquid mixture of an ore slurry and of a liquid biochemical oxidation medium is flowed through a plurality of covered overflow tanks connected in series. The liquid mixture is continuously aerated in an aeration chamber formed in the tanks with a mixture of a purified oxygen gas and a purified carbon dioxide gas as introduced into the aeration chamber. A substantially sulfide-free liquid mixture is discharged from a last tank into a clarifier in which at least a portion of the biochemical oxidation medium is separated from the liquid mixture for recirculation into the tanks.