Continuous nickel matte converter for production of low iron...

C - Chemistry – Metallurgy – 22 – B

Patent

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C22B 23/02 (2006.01) C22B 9/05 (2006.01) C22B 15/00 (2006.01) C22C 3/00 (2006.01) F27B 3/04 (2006.01)

Patent

CA 2387683

A continuous nickel matte converter and method for the efficient production of low iron nickel-rich mattes from high--iron nickel-rich mattes, with minimal environmental impact. The present invention processes high-iron, nickel-rich primary furnace mattes to produce low iron, nickel-rich mattes, low value metal-containing slag and sulfur dioxide rich-off-gas, with improved cobalt recovery. It eliminates use of the Peirce-Smith converter, with its undesirable environmental, metallurgical and economic features.

L'invention concerne un convertisseur continu de matte de nickel et un procédé permettant une production efficace de mattes riches en nickel à faible teneur en fer à partir de mattes riches en nickel et à teneur élevée en fer, avec des répercutions minimales sur l'environnement. Ce convertisseur traite des mattes riches en nickel à teneur élevée en fer obtenues dans le four primaire de manière à produire des mattes riches en nickel à faible teneur en fer, des scories contenant des métaux de faible valeur, et un effluent gazeux riche en dioxyde de soufre, avec une récupération améliorée de cobalt. Ce convertisseur permet de remplacer le convertisseur de type Pierce-Smith qui comporte des caractéristiques environnementales, métallurgiques et économiques défavorables.

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