Process for treating ore having recoverable metal values including arsenic containing components

US6248301A · kind A · utility

Assignee

• Newmont Mining Corporation and Newmont Gold Company · US

Inventors

• Anthony L. Hannaford · Springbok, ZA
• K. Marc Le Vier · Salt Lake City, US
• Rene R. Fernandez · Elko, US
• Gopalan Ramadorai · Golden, 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

Key dates

• Filing date: Mar 17, 1997
• Grant date: Jun 19, 2001
• Expiry date: Mar 17, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22B1/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

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.degree. 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.