Liquid treatment method and system

C - Chemistry – Metallurgy – 22 – B

Patent

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C22B 3/06 (2006.01) B01D 61/02 (2006.01) B01D 61/04 (2006.01) B01D 61/14 (2006.01) C22B 3/18 (2006.01) C22B 3/20 (2006.01) C22B 15/00 (2006.01)

Patent

CA 2189535

A method of recovering copper from a lixivant solution (316) used in leaching copper from ore materials (304). The metal ion containing liquid (322) is passed through a nanofiltration membrane system (346a- 346d) to produce a metal ion rich retentate and a permeate. The retentate may be saved for metal recovery or discarded. To purify the permeate and remove residual metal ions therefrom, it may thereafter be passed through one or more columns (410, 420) containing metal ion extracting materials, such as porous polymer beads having biomass materials therein.

Procédé de récupération du cuivre dans une solution de lessivage (316) utilisée dans le lessivage du cuivre a partir de matières métallifères (304). On fait passer le liquide (322) contenant des ions métal à travers un système à membrane de nanofiltration (346a-346d) afin de produire un rétentat et un perméat riches en ions métal. On peut conserver le rétentat pour récupérer le métal qu'il contient, ou le mettre au rebut. Pour purifier le perméat et en extraire les ions métal résiduels, on peut le faire passer ensuite dans une ou plusieurs colonnes (410, 420) contenant des matières d'extraction d'ions métal tels que des billes polymères poreuses contenant des matières à biomasse.

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