Abstract: A process for extraction of copper from an arsenical copper sulfide concentrate is provided. The process includes atmospheric oxidative leaching of a feed slurry including the arsenical copper sulfide concentrate and an acidic iron sulfate-containing leach solution, in the presence of oxygen, to produce a leach slurry including copper and arsenic dissolved into the leach solution. After dissolving the copper and arsenic, and before precipitating the arsenic dissolved during the oxidative leaching, pre-precipitation solids are recovered from the leach slurry to produce the pre-precipitation solids and a resulting pregnant leach solution including the copper and arsenic. Scorodite-containing seed is introduced to the pregnant leach solution including the copper and arsenic to induce precipitation of the arsenic dissolved during the oxidative leaching, as scorodite.
Type:
Grant
Filed:
June 4, 2018
Date of Patent:
June 18, 2019
Assignee:
Compañia de Mínas Buenaventura
Inventors:
Percy Ponce Beoutis, Juan Carlos Gustavo Plenge Thorne
Abstract: A process for extraction of copper from an arsenical copper sulfide concentrate is provided. The process includes atmospheric oxidative leaching of a feed slurry including the arsenical copper sulfide concentrate and an acidic iron sulfate-containing leach solution, in the presence of oxygen, to produce a leach slurry including copper and arsenic dissolved into the leach solution. After dissolving the copper and arsenic, scorodite-containing seed is introduced to the leach slurry to induce precipitation of the arsenic dissolved during the oxidative leaching, as scorodite.
Type:
Grant
Filed:
July 28, 2016
Date of Patent:
December 11, 2018
Assignee:
COMPAÑIA DE MINAS BUENAVENTURA
Inventors:
Percy Ponce Beoutis, Juan Carlos Gustavo Plenge Thorne