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Oxide Copper Ore Acid Leaching New Process

     

Oxide Copper Ore Acid Leaching New Process

Following the crushing and screening of copper oxide ores, the oversize material undergoes conventional acid leaching. The undersize material is subjected to concentration, thickening, and pelletizing before being used for further heap leaching.

The pregnant leach solution rich in copper ions undergoes solvent extraction and electrorefining to produce marketable cathode copper.

After concentration of the undersized material, a binder is added to create slurry. This slurry is then mixed with preprepared 5mm-25mm diameter acid-resistant crushed stones to form pellets. The pelletizing heap leaching process involves building heaps approximately 3-5 meters in height. During leaching, the sulfuric acid concentration ranges from 0.1-2 mol/L, and the leaching cycle typically lasts for 1-2 months.

This method is particularly suited for copper ores dominated by oxide copper in areas such as remote regions of Western China, especially in high-altitude areas where copper ore processing is challenging.

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