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US 12,595,529 B2Granted
Alkaline oxidation methods and systems for recovery of metals from ores
AssigneeAlderley Gold Corp.
InventorRandy Buffington
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Abstract
An oxidation step for sulfide and transition ores prior to CN leaching to recover 60 to 90 percent of metals from those ores. Use of tona, soda ash or carbonate source in treating sulfide and transition ores for CN leaching recovery of metals, including gold and silver. The oxidation of sulfide and transition ores in the presence of carbonate. Low moisture content in the heap, to enhance available oxygen, during the oxidation of sulfide and transition ores in the presence of carbonate.
Claims18
A method for metal recovery, the method comprising:
- contacting an ore material comprising iron and sulfur with an oxidizing agent and a carbonate to form an oxidized sulfide material and an iron and carbonate complex;
- contacting the oxidized sulfide material and the iron and carbonate complex with a solution that comprises a bicarbonate;
- adjusting a pH of the contacted solution;
- and recovering the metal from the contacted solution.
1 more element
Dependencies are inferred from the claim text.