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US 2020/0056260 A1Published application
Extraction methods from refractory ores
AssigneeTcm Research Ltd.
InventorsDmitri S. Terekhov, Colwyn S. van der Linde
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Abstract
A method for extracting and separating Gold, Silver, Copper, Zinc and/or Lead from an Arsenic-containing ore, concentrate or tailings characterized in that the extraction is carried by roasting in the presence of a calcium-containing material and at least one of an alkali metal halide and alkaline metal halide. In the method, Arsenic remains immobilized in the extraction residue.
Claims15
A method for extracting at least one metal from an Arsenic-containing ore, concentrate or tailings, the method comprising:
- mixing the ore, concentrate or tailings with a calcium-containing material and at least one from an alkali metal halide and alkaline metal halide;
- heating the mixture in the presence of air or oxygen, and thereby producing metal-containing volatile complexes and a solid residue comprising immobilized arsenic;
- condensing the volatile complexes in a scrubber containing at least one dry sorbent bed, and thereby producing a metal-loaded sorbent bed;
- recovering the metal from the metal-loaded sorbent bed;
- and
- disposing of the residue containing immobilized Arsenic.
3 more elements
Dependencies are inferred from the claim text.