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Recovering Copper from Copper Oxide Ores

     

This process is characterized by adopting a new leaching agent system of NH₃-NH₄F (or NH₃-NH₄HF₂) to replace the NH₃-(NH₄)₂CO₃ or NH₃-(NH₄)₂SO₄ system used in traditional ammonia leaching processes. The original process route of "high-temperature reduction roasting followed by atmospheric ammonia leaching" is thus simplified to direct atmospheric ammonia leaching. When coupled with solvent extraction and electrowinning, this method forms a new process flow for treating such ores.

This process has the advantages of short process flow, simple and convenient operation, low energy consumption, short leaching time and high copper leaching rate. It can be applied to the selective recovery of copper from copper oxide ores, and is particularly suitable for processing refractory copper oxide ores with high content of alkaline gangue.

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