Improved leaching process

Details Improved leaching process Improved leaching process

C - Chemistry, Metallurgy

22

B

C22B 3/04 (2006.01) C22B 3/02 (2006.01)

Patent

CA 2446321

A process for the oxidative leaching of sulphide mineral species, the method characterised by the method steps of: leaching a slurry containing the mineral species in one or more reaction vessels; circulating a stream of leach liquor to a flash cooler; flashing the liquor in the flash cooler at a pressure less than atmospheric pressure so as to dissipate heat; and recirculating the liquor to the or each reaction vessel.

L'invention concerne un procédé de lessivation oxydative d'une espèce minérale sulfurée, qui consiste à: lessiver une pulpe contenant l'espèce minérale dans une ou plusieurs cuves à réaction; injecter en circuit un flux de liqueur lixiviante dans un refroidisseur instantané; vaporiser par détente brusque la liqueur dans le refroidisseur instantané à une pression inférieure à la pression atmosphérique, de façon à dissiper la chaleur; et réinjecter en circuit la liqueur dans la ou chaque cuve à réaction.

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