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Recovering Copper from Mixed Copper Ores

     

Method for Recovering Copper from Mixed Copper Ores,This method is characterized by the following steps:

1、Grind the raw ore until the proportion of particles with size less than 0.075 mm (the minus 0.075 mm fraction) accounts for 60%~80%. Calculated based on the mass of the raw ore, add 500~1200 g/t of sodium sulfide (Na₂S), 100~1000 g/t of sodium butyl xanthate, and 25~100 g/t of pine oil sequentially, then carry out flotation to obtain copper concentrate and flotation tailings.

2、Subject the flotation tailings to magnetic separation under a magnetic field intensity of 0.35~1.30 T to obtain magnetic concentrate and magnetic tailings.

3、Concentrate and dewater the magnetic concentrate until its liquid-solid ratio reaches 2~3:1. Add concentrated sulfuric acid to adjust the pH to 1, perform agitated leaching for 20~60 minutes, then conduct solid-liquid separation to obtain leachate and leaching residue. The leachate is treated via hydrometallurgical processes to produce cathode copper.

This combined mineral processing-hydrometallurgy process achieves a high comprehensive copper recovery rate. It is a simple, efficient, cost-effective, energy-saving and eco-friendly approach for comprehensive copper recovery, and is applicable to the treatment of mixed copper ores.

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