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Method for Recovering Mixed Copper Ores

     

The method is characterized by the following steps:

Ore Grinding: The ore is ground to -0.075 mm, representing 60–80% of the original mineral content.

Chemical Addition: Add 500–1200 g/t of sodium thiosulfate (NaS), 100–1000 g/t of malachite, and 25–100 g/t of oleate (e.g., sodium dodecyl sulfate or similar).

Copper Concentrate Separation: The treated ore is separated into copper concentrate and flotation tailings.

Magnetic Separation: The flotation tailings are subjected to magnetic separation under a field strength of 0.35–1.30 Tesla, yielding magnetic concentrate and magnetic tailings. The magnetic concentrate is then dried to a liquid-to-solid ratio of 2–3:1.

Leaching: Add concentrated sulfuric acid (H₂SO₄) to achieve a pH of 1, agitate the mixture for 20–60 minutes, and perform solid-liquid separation to yield leach solution and precipitated residue.

Wet Metallurgical Processing: The leach solution is processed using wet metallurgical methods to produce cathode copper.

This method combines flotation and leaching processes and achieves a high copper recovery rate. It is simple, efficient, cost-effective, energy-saving, and environmentally friendly, making it an ideal approach for processing mixed copper ores.

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