Leach extraction method

Details Leach extraction method Leach extraction method

C - Chemistry, Metallurgy

22

B

C22B 3/08 (2006.01) B01J 3/04 (2006.01) C22B 15/00 (2006.01)

Patent

CA 2544511

There is provided a method for leach extraction of copper/iron/sulphur ores and concentrates including leaching the mineral with an aqueous stream containing ferric ions and sulphuric acid in the presence of oxygen, the aqueous stream including a solution formed by reaction of basic ferric sulphate with excess sulphuric acid. Integrated methods of forming and releaching basic ferric sulphate are also described.

L'invention concerne un procédé d'extraction par lixiviation de minerais et de concentrés de cuivre/fer/soufre, qui comporte l'étape consistant à lixivier le minéral au moyen d'un écoulement aqueux contenant des ions ferriques et de l'acide sulfurique, en présence d'oxygène. L'écoulement aqueux comprend une solution formée par la mise en réaction de sulfate ferrique basique avec de l'acide sulfurique en excès. Des procédés intégrés permettant de former et de relixivier le sulfate ferrique basique sont également décrits.

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