Method and system for metal recovery from arsenical bearing sulfides ores
AssigneeDundee Sustainable Technologies Inc.
InventorsJean-Marc Lalancette, David Lemieux, Romain Barbaroux, Gabriel Garcia-Curiel, Khalil Nasrallah
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Abstract
There is provided a method for the removal of arsenic from an arsenical bearing sulfides ore, comprising a thermal treatment of arsenical sulfide in the presence of sulfur dioxide, yielding a calcine and a sublimate, the sublimate containing arsenious oxide. The method allows recovering metallic value from an arsenic-bearing metallic sulfides ore, by recovery of the calcine comprising the metallic value of the ore.
Claims11
A method for the removal of arsenic from an arsenic bearing sulfides ore, consisting of a thermal treatment of the arsenic sulfides of the arsenic bearing sulfides ore in a sulfur dioxide atmosphere in absence
- of oxidation of metal sulfides, arsenic and the arsenic sulfides being oxidized to As2O3 as per relations 4As+3O2>2 As2O3 and As2O3, +3.5 O2>2 As2O3+2S O2, yielding a calcine and a sublimate, the sublimate containing As2O3.
Dependencies are inferred from the claim text.