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.
Claims20
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.
A stabilization process for an arsenic solution, the process comprising:
- oxidizing the arsenic solution to oxidize As3+ to As5+ and reduced sulfur species to sulfates, to yield an oxidized solution;
- and
- acidifying the oxidized solution to yield an acidified oxidized solution;
- and
- forming a stable arsenic compound from the acidified oxidized solution.
Dependencies are inferred from the claim text.