Controlled copper leach recovery circuit

C - Chemistry – Metallurgy – 22 – B

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Details

C22B 3/26 (2006.01) C22B 15/00 (2006.01) C25C 1/12 (2006.01)

Patent

CA 2699893

The present invention relates generally to a process for controlled leaching and sequential recovery of two or more metals from metal-bearing materials. In one exemplary embodiment, recovery of metals from a leached metal-bearing material is controlled and improved by providing a high grade pregnant leach solution ("HGPLS") and a low grade pregnant leach solution ("LGPLS") to a single solution extraction plant comprising at least two solution extractor units, at least two stripping units, and, optionally, at least one wash stage.

La présente invention porte, d'une manière générale, sur un procédé de lixiviation contrôlée et de récupération séquentielle de deux métaux ou plus présents dans des matériaux métallifères. Dans un mode de réalisation donné à titre d'exemple, la récupération des métaux d'un matériau métallifère lixivié est contrôlée et améliorée au moyen d'une solution mère de lixiviation de haute qualité (high grade pregnant leach solution/ HGPLS) et d'une solution mère de lixiviation de faible qualité (low grade pregnant leach solution/ LGPLS) dans une installation d'extraction de solution unique comprenant au moins deux unités d'extraction de solution, au moins deux unités de décapage et, éventuellement, au moins un étage de lavage.

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