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Difficult-to-Treat Gold Mines' BioHeap Leaching

     

Difficult-to-Treat Gold Mines' BioHeap Leaching Pre-Oxidation Method:

The difficult-to-treat gold mine bioheap leaching pre-oxidation method includes the following steps:

1)After crushing the original ore, heap it and perform spray leaching on the poorly recoverable, difficult-to-treat gold mine. Keep the temperature of the leaching solution above 45℃;

2)When the pH of the leaching solution is below 1.5, neutralize the solution to adjust its pH to between 1.5 and 1.9;

3)After neutralization, transfer the adjusted leaching solution to the biofixed bed. The acidophilic bacteria in the fixed bed adsorb and oxidize ferrous ions. Once the solution's reduction potential exceeds 850mV, a high-potential oxidation solution is obtained;

4)The high-potential oxidation solution obtained from step 3 is recycled for use in step 1 until the ore pre-oxidation is complete.

This method is simple and easy to control in terms of process parameters. It effectively promotes the dissolution of large amounts of pyrite, improves oxidation efficiency, and reduces production costs.

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