Production of ferro-nickel or nickel matte by a combined...

C - Chemistry – Metallurgy – 22 – B

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C22B 3/00 (2006.01) C22B 3/42 (2006.01) C22B 3/44 (2006.01) C22B 3/46 (2006.01) C22B 23/00 (2006.01)

Patent

CA 2580542

A process for the production of ferro-nickel or nickel matte from a product liquor solution containing at least nickel, cobalt, iron and acid soluble impurities, said process including the steps of: a) contacting the product liquor solution (7) containing the nickel, cobalt, iron and acid soluble impurities with an ion exchange resin (8), wherein the resin selectively absorbs nickel and iron from the solution leaving the cobalt and the acid soluble impurities in the raffinate (9); b) stripping the nickel and iron from the resin with a sulfuric acid solution to produce an eluate (11) containing nickel and iron; c) neutralising the eluate to precipitate a mixed nickel iron hydroxide product (13); and d) reducing and smelting the mixed nickel iron hydroxide product to produce ferro-nickel (29) or nickel matte (24).

L'invention porte sur un procédé de production d'une matte de ferronickel ou de nickel à partir d'une solution de liqueur de produit contenant au moins du nickel, du cobalt, du fer et des impuretés solubles dans l'acide. Ledit procédé comporte les étapes suivantes: (a) mise en contact de ladite solution (7) avec une résine échangeuse d'ions (8) qui absorbe sélectivement le nickel et le fer de la solution et laisse dans le raffinat (8) le cobalt et les impuretés (9) solubles dans l'acide; (b) épuisement du nickel et du fer de la résine par une solution d'acide sulfurique de manière à produire un éluat (11) contenant nickel et le fer; (c) neutralisation de l'éluat faisant précipiter un produit mixte d'hydroxydes de nickel et le fer; et (d) réduction et fusion des hydroxydes pour obtenir une matte de ferronickel (29) ou une matte de nickel (24).

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