C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/08 (2006.01) C22B 3/06 (2006.01) C22B 3/26 (2006.01) C22B 3/38 (2006.01) C22B 15/00 (2006.01) C22B 23/00 (2006.01)
Patent
CA 2221930
A process for the extraction of a metal from an ore or concentrate comprises subjecting the ore or concentrate to pressure oxidation in the presence of oxygen and an acidic solution containig halogen ions and a source of bisulphate or sulphate ions, such as H2SO4. The metals which can be extracted by the process comprises copper as well as non-cuprous metals such as zinc, nickel and cobalt. During pressure oxidation the metal may be precipitated as an insoluble basic salt, such as basic copper sulphate or substantially completely solubilized and precipitated later as the basic metal salt.
L'invention concerne un procédé pour extraire un métal d'un minerai ou d'un produit concentré. Ce procédé consiste à soumettre le minerai ou le concentrat à une oxydation sous haute pression en présence d'oxygène et d'une solution acide contenant des ions halogène et une source d'ions bisulfate ou sulfate, tel que du H2SO4. Parmi les métaux que l'on peut extraire par ce procédé, il convient de mentionner le cuivre, ainsi que des métaux non cuivreux, tel que le zinc, le nickel et le cobalt. Pendant l'oxydation sous haute pression, le métal peut être précipité sous la forme d'un sel alcalin insoluble, tel qu'un sulfate de cuivre de base, ou être sensiblement totalement solubilisé et précipité ensuite comme le sel de métal alcalin.
Cesl Limited
Cominco Engineering Services Ltd.
Sim & Mcburney
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