Method for processing nickel bearing raw material in...

C - Chemistry – Metallurgy – 22 – B

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C22B 23/00 (2006.01) C22B 11/00 (2006.01) C22B 26/00 (2006.01)

Patent

CA 2624612

The invention relates to a method for processing a nickel product from nickel- bearing sulphidic raw materials, such as nickel sulphide concentrate or ore. According to the invention, the raw material is leached in atmospheric conditions in an aqueous solution of sodium chloride and copper (II) chloride. The reagents needed for leaching nickel and for processing the products, such as chlorine, hydrogen and sodium hydroxide, are obtained from chlorine-alkali electrolysis that is integrated as a step in the process.

La présente invention concerne un procédé pour traiter un produit de nickel à partir de matières premières portant du sulfure de nickel, telles qu'un concentré ou un minerai de sulfure de nickel. Selon cette invention, la matière première est soumise à une lixiviation dans des conditions atmosphériques, dans une solution aqueuse de chlorure de sodium et de chlorure de cuivre (II). Les réactifs nécessaires à la lixiviation du nickel et au traitement des produits, tels que du chlore, de l'hydrogène et de l'hydroxyde de sodium, sont obtenus grâce à une électrolyse de chlore-alcali qui est intégrée comme une étape dans ledit procédé.

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