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:
Jun. 19, 2001
Filed:
Mar. 17, 1997
Applicant:
Inventors:
Anthony L. Hannaford, Littleton, CO (US);
K. Marc Le Vier, Englewood, CO (US);
Rene R. Fernandez, Elko, NV (US);
Gopalan Ramadorai, Tuscon, AZ (US);
Arno Fitting, Neu-Anspach, DE;
Gurudas Samant, Fronhausen, DE;
Bodo Peinemann, Frankfurt am Main, DE;
Gebhard Bandel, Frankfurt am Main, DE;
Hans Kofalck, Hattersheim, DE;
Assignee:
Newmont Mining Corporation and Newmont Gold Company, Denver, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01G 5/500 ; C01G 7/00 ; C22B 1/100 ; C22B 1/00 ;
U.S. Cl.
CPC ...
C01G 5/500 ; C01G 7/00 ; C22B 1/100 ; C22B 1/00 ;
Abstract
Refractory gold ores are roasted in the presence of added fuels in an oxidizing atmosphere in a fluidized bed at a temperature from 450 to 650° C., which is supplied with oxygen-containing gases; to achieve a low ignition and thus low roasting temperature, sulfur, pyrite or mixtures thereof are used as added fuels.