A process for recovery of iron from copper slag

C - Chemistry – Metallurgy – 22 – B

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C22B 7/04 (2006.01) C21B 13/00 (2006.01) C22B 15/00 (2006.01)

Patent

CA 2632530

The present invention relates to a process for recovery of iron from copper slag. This invention particularly relates to a process for recovery of iron from a waste like granulated copper slag generated during the production of copper from its ores by a pyrometallurgical method. The present invention will be useful for solving the ecological and environmental issues with an added economic advantage of utilising the dump slag generated in the copper plants. Novelty of the present invention is process for the preparation of value added products viz grinding grade cast iron using copper slag generated during the processing of copper concentrate which otherwise is considered as a waste. Other novel features of the inventions are creating a homogeneous mixture of slag, reductant and flux so that reaction kinetics is more than conventional process. The reductant is used in such a way so that maximum recovery of iron can take place.

La présente invention concerne un processus de récupération de fer à partir de laitier de cuivre. La présente concerne en particulier un processus de récupération de fer à partir de laitier de cuivre granulé de type déchet et généré pendant la production de cuivre à partir de ses minerais selon un procédé pyrométallurgique. La présente invention permettra de résoudre les problèmes écologiques et environnementaux avec un avantage économique supplémentaire consistant à utiliser le laitier de mauvaise qualité généré dans les usines de cuivre. La nouveauté de la présente invention réside dans l~élaboration de produits à valeur ajoutée par rapport à la fonte de qualité de meulage à l~aide de laitier de cuivre généré pendant le traitement de concentré de cuivre que l~on considère d~ordinaire comme déchet. D~autres caractéristiques novatrices de l~invention portent sur la création d~un mélange homogène de laitier, d~un réductant et d~un flux pour que les cinétiques de réaction soient supérieures au processus conventionnel. On utilise le réductant pour obtenir la récupération maximale de fer.

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