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Recovering Mixed Copper Ore

     

The method is characterized in that it comprises the following steps:

Grind the raw ore until the -0.075 mm particle fraction accounts for 60% to 80% of the total mass. Add 500-1200 g/t of sodium sulfide (Na₂S), 100-1000 g/t of sodium butyl xanthate, and 25-100 g/t of pine alcohol oil (dosages calculated based on the mass of raw ore) for flotation, to obtain copper concentrate and flotation tailings.

Subject the flotation tailings to magnetic separation at a magnetic field intensity of 0.35-1.30 T, to obtain magnetic concentrate and magnetic tailings.

Thicken and dewater the magnetic concentrate to a liquid-solid ratio of 2-3:1, add concentrated sulfuric acid to adjust the pH to 1, perform agitation leaching for 20 to 60 minutes, and carry out solid-liquid separation to obtain leachate and leaching residue. The leachate is treated via hydrometallurgical processes to obtain cathode copper.

The method of the present invention is a combined beneficiation-metallurgy process with a high comprehensive copper recovery rate. As a simple, efficient, economical, energy-saving and environment-friendly method for comprehensive copper recovery, it is applicable to mixed copper ores.

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