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Process for High-Sulfur Chalcopyrite Ores

     

This low-cost, high-recovery process for the treatment of high-sulfur chalcopyrite ores includes the following stages:

1、Boiling Roasting;

2、Low-acid Leaching;

3、Flotation;

4、High-copper Leaching;

5、Copper Solvent Extraction;

6、Low-copper Solvent Extraction;

The process involves boiling roasting of high-sulfur chalcopyrite ores, followed by low-acid leaching and flotation without the need for additional reagents beyond a small amount of floatation agents. This method achieves over 85% sulfation rates for cobalt and copper, with extraction rates exceeding 98%, while the slag contains less than 0.15% cobalt and less than 0.30% copper. The roasting process is self-sustaining and requires no external energy input, resulting in low energy costs. Additionally, the steam generated during roasting can be utilized for heating in wet leaching, and the process avoids the addition of harmful elements like chlorine, thus minimizing the risk of corrosion to equipment and degradation of copper solvents.

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