Systems and methods for metal value leaching and recovery using thiosulfate
The use of thiosulfate for leaching metal values from ores, combined with sulfate removal and recycling processes, addresses the inefficiencies and environmental concerns of existing methods, enhancing metal recovery and reducing costs.
Patent Information
- Application Number
- PCT/CA2024/051413
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-10-27
- Filing Date
- 2024-10-25
- Publication Date
- 2025-05-01
AI Technical Summary
Current methods for recovering precious metals like gold and silver from ores, such as cyanide leaching, are inefficient for certain ore types, environmentally risky, and economically unviable due to high costs and limited metal recovery.
A method involving the use of thiosulfate for leaching metal values from ores, which includes forming an aqueous slurry, allowing thiosulfate to complex metals, precipitating metals, separating solids from solutions, treating barren solutions to remove sulfates, and recycling the treated solutions back into the leaching process.
This method enhances the recovery of metal values by reducing reliance on exogenous thiosulfate sources, improving the efficiency of metal extraction, and minimizing environmental impact by reducing sulfate levels and promoting the recycling of valuable compounds.