Copper precipitation process

C - Chemistry – Metallurgy – 22 – B

Patent

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C22B 3/08 (2006.01) C01G 3/10 (2006.01) C01G 3/12 (2006.01) C22B 15/00 (2006.01)

Patent

CA 2212378

A method for separating copper and other metals in solution comprising the steps of precipitating the copper in a reactor at a free acid range of about 0.05 to 180 grams per liter, at a temperature from about 25 ~C to about 90 ~C in an aqueous solution with elemental sulfur, or chalcopyrite, and material selected from the group consisting of soluble sulfites and soluble bisulfites, and separating the precipitated copper, in the form of copper sulfides, by thickening the solution, recycling part to the precipitation step, and filtering copper sulfides from the other part.

La présente invention concerne un procédé de séparation du cuivre et d'autres métaux dans une solution. Ce procédé consiste à précipiter le cuivre dans un réacteur contenant environ 0,05 à 180 grammes d'acide libre par litre, à une température allant d'environ 25 ·C à environ 90 ·C dans une solution aqueuse comprenant du soufre élémentaire ou de la chalcopyrite, et une matière appartenant au groupe des sulfites solubles et bisulfites solubles. Le procédé consiste ensuite à séparer le cuivre précipité, sous forme de sulfures de cuivre, en épaississant la solution, en recyclant une partie par la phase de précipitation, et en séparant par filtration les sulfures de cuivre des autres parties.

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