Process for separation of at least one metal sulfide from a mixed sulfide ore or concentrate
AssigneeGoldcorp Inc.
InventorsMarcus Tomlinson, Teodoro Martinez, Simon Hille
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Abstract
A stabilization process for an arsenic solution comprising thiosulfates, the process comprising: acidifying the arsenic solution to decompose the thiosulfates, to yield an acidified solution; oxidizing the acidified solution to oxidize residual As3+ to As5+ and reduced sulfur species to sulfates, to yield a slurry comprising elemental sulfur; separating elemental sulfur from the slurry to yield a liquid; oxidizing the liquid to oxidize residual reduced sulfur species, to yield an oxidized solution; and forming a stable arsenic compound from the oxidized solution.
Claims29
A process for separation of antimony and arsenic from a leach solution comprising soluble antimony and arsenic, the process comprising:
- oxidizing the soluble antimony and arsenic in the leach solution so as to reach an oxidation end point determined by at least one of wavelength monitoring and oxidation reduction potential (ORP) monitoring, to yield soluble antimony and arsenic thiosalts;
- and
- oxidizing the soluble antimony and arsenic thiosalts to yield an antimony precipitate and an arsenic solution.
Dependencies are inferred from the claim text.