Integrated, tank/heap biooxidation process for the...

Details Integrated, tank/heap biooxidation process for the... Integrated, tank/heap biooxidation process for the...

C - Chemistry, Metallurgy

22

B

C22B 3/18 (2006.01) C22B 11/08 (2006.01)

Patent

CA 2288203

A metal-containing refractory sulfide ore (12) is split into a first portion (16) and a second portion (18). The first portion (16) is partially biodigested by a sulfide-digesting microorganism in a biooxidation reactor (20) where the microorganism is acclimated to the sulfide "diet" provided by the ore. The partially digested ore (22) is then combined (24) with the second portion (18). The resulting material (26) is then dewatered (25, 28), biooxidized (32), and subjected to a lixiviation process (42).

Selon cette invention, on sépare un minerai sulfuré (12) réfractaire contenant du métal en une première partie (16) et en une seconde partie (18). La première partie (16) est partiellement digérée par un micro-organisme de digestion du sulfure dans un réacteur (20) de biooxydation, le micro-organisme étant adapté à "l'alimentation dosée" en sulfure fournie par le minerai. Le minerai partiellement digéré (22) est ensuite combiné (24) avec la seconde partie (18). Le matériau (26) obtenu est ensuite déshydraté (25, 28), biooxydé (32) et soumis au procédé de lixiviation (42).

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