C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/18 (2006.01) C22B 3/00 (2006.01) C22B 15/00 (2006.01)
Patent
CA 2374509
Disclosed is a method for heap leaching an ore containing chalcopyrite. Acidic liquor containing iron or sulphur oxidising bacteria is introduced to a heap containing chalcopyrite ore for contacting with that ore. Such contacting will liberate copper from the ore. During this process, an oxygen-containing gas is introduced to the heap as a source of oxygen for the bacteria. The oxygen- containing gas is introduced to a heap having saturation and temperature controlled to maintain a substantial portion of the heap at a temperature such that thermophilic bacteria leach the chalcopyrite at an economically acceptable rate. A heap leaching system (1) operating in accordance with the method is also disclosed.
La présente invention concerne un procédé de lixiviation en tas d'un minerais contenant de la chalcopyrite. De la liqueur acide contenant du fer ou du soufre oxydant des bactéries est incorporé à un tas contenant du minerais de chalcopyrite, de façon à entrer en contact avec ce minerais. Une telle mise en contact provoque la libération de cuivre à partir du minerais. Au cours de ce processus, un gaz contenant de l'oxygène est incorporé audit tas afin de fournir une source d'oxygène aux bactéries. Le gaz contenant de l'oxygène est incorporé à un tas dont la saturation et la température sont contrôlées de façon à maintenir une partie importante dudit tas à une température permettant aux bactéries thermophiles de lixivier la chalcopyrite à une vitesse économiquement acceptable. Cette invention concerne également un système de lixiviation (1) permettant de mettre en oeuvre le procédé décrit.
Miller Paul
Winby Richard
Bactech (australia) Pty Ltd.
Dennison Associates
Miller Paul
Winby Richard
LandOfFree
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