A method for purifying the solution in the...

C - Chemistry – Metallurgy – 22 – B

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C22B 3/44 (2006.01) C22B 3/10 (2006.01) C22B 15/00 (2006.01)

Patent

CA 2464398

The invention relates to the removal of bivalent copper from copper chloride solution in connection with the hydro--metallurgical production of copper. In the copper production process, a copper-bearing raw material is leached with a chloride-bearing solution. The copper chloride solution formed in the leaching, which contains both mono- and bivalent copper, undergoes bivalent copper removal at least in part by precipitation, and the copper(I) chloride solution is conducted to further treatment. Precipitation of the bivalent copper occurs as alkaline copper chloride precipitation. The alkaline copper(II) chloride formed is leached as copper(II) chloride either separately or in connection with raw material leaching, and is used in copper raw material leaching.

La présente invention concerne l'élimination de cuivre bivalent d'une solution de chlorure de cuivre en relation avec la production hydro-métallurgique de cuivre. Dans le cadre du processus de production de cuivre, un matériau brut comprenant du cuivre est lixivié par une solution comprenant du chlorure. La solution de chlorure de cuivre formée par lixiviation, qui contient à la fois du cuivre monovalent et du cuivre bivalent, subit l'élimination du cuivre bivalent au moins en partie par précipitation, et la solution de chlorure de cuivre(I) subit un nouveau traitement. La précipitation du cuivre bivalent s'effectue en tant que précipitation de chlorure de cuivre alcalin. Le chlorure de cuivre(II) alcalin formé est lixivié en tant que chlorure de cuivre(II) soit séparément, soit en même temps que la lixiviation du matériau brut, et est utilisé pour la lixiviation du matériau brut comprenant du cuivre.

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