C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/20 (2006.01) C22B 11/00 (2006.01) C22B 11/06 (2006.01)
Patent
CA 2480315
The invention relates to a method for the recovery of gold in connection with the hydrometallurgical production of copper from a residue or intermediate product containing sulphur and iron generated in the leaching of copper raw material. The recovery of both copper and gold takes place in a chloride milieu. The gold contained in the residue or intermediate product is leached using bivalent copper and oxygen in copper (II) chloride - sodium chloride solution in the conditions, where the oxidation-reduction potential is a maximum of 650 mV and the pH at least 1. The iron and sulphur contained in the residue remain for the most part undissolved.
La présente invention a trait à un procédé de récupération de l'or dans le cadre de la production hydrométallurgique du cuivre à partir d'un résidu ou produit intermédiaire contenant du soufre et du fer générés dans la lixiviation de la matière première de cuivre.
Haemaelaeinen Matti
Hyvaerinen Olli
Norton Rose Or S.e.n.c.r.l.,s.r.l./llp
Outokumpu Oyj
Outotec Oyj
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