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Improving the Copper Leaching Rate

     

Method for Improving the Copper Leaching Rate from Cuprite-Type Copper Oxide Ore by Adding Chlorine Dioxide:

Add an appropriate amount of cuprite ore into a three-neck round-bottom flask and pre-stir for a preset period of time. Add a specified mass of chlorine dioxide into the flask, then stir at room temperature to oxidize the cuprite, so that the cuprous oxide contained in the cuprite is converted into cupric oxide. After that, add sulfuric acid and carry out the leaching test with heating provided by a water bath. Copper is finally recovered from the leachate through filtration, solvent extraction and electrowinning.

Direct leaching of cuprite-type copper oxide ore has the drawbacks of long reaction time and high reaction temperature, while the addition of chlorine dioxide effectively improves the leaching efficiency of cuprite-type copper oxide ore in sulfuric acid. Chlorine dioxide is harmless to humans and animals and does not cause secondary pollution to the environment, so no hazardous components will remain in the leachate after the leaching process. Meanwhile, the application of chlorine dioxide in the oxidative leaching of cuprite-type copper oxide ore provides a new direction for the leaching of other minerals.

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