Heap leach process

C - Chemistry – Metallurgy – 22 – B

Patent

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Details

C22B 3/04 (2006.01) C22B 3/00 (2006.01) C22B 3/18 (2006.01) C22B 15/00 (2006.01)

Patent

CA 2498949

The invention discloses a method of controlling a heap leach process through controlling an irrigation rate of a heap as a function of at least one of an aeration rate of the heap, a determination of advection at least at one predetermined point in the heap, and a determination of temperature at least at one predetermined point in the heap. Also disclosed is for the aeration to be forced and for the method to include the step of controlling the aeration rate as 10 a function of a determination of the oxidation rate of material within the heap. The invention also extends to a method for the introduction of microorganisms into the heap of material, a method for increasing the temperature of heap of material for heap leaching, a method of determining an optimum heap configuration for a bio-assisted heap leach process of an ore heap, and a method of enriching the environment of microorganisms embedded in a heap of material for bio-assisted heap leaching.

L'invention concerne un procédé de commande d'un processus de lixiviation de tas consistant à réguler un taux d'irrigation d'un tas en fonction d'au moins d'un taux d'aération du tas, à réaliser une détermination d'advection sur au moins un point déterminé du tas, et à déterminer la température d'au moins un point déterminé de ce tas. L'invention concerne aussi l'aération forcée par un procédé consistant à réguler le taux d'aération en fonction de la détermination du taux d'oxydation du matériau à l'intérieur du tas. Elle concerne aussi un procédé d'introduction de micro-organismes dans le tas de matériau, un procédé d'augmentation de la température du tas de matériau aux fins de lixiviation du tas, un procédé de détermination de la configuration optimale du tas dans le cadre d'un processus bio-assisté de lixiviation d'un tas de minerai, et un procédé d'enrichissement de l'environnement avec des micro-organismes incorporés dans un tas de matériau dans le cadre de lixiviation bio-assistée.

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