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Gold Leaching Process for Gold Ores

     

The rapid gold leaching method, which extracts gold from gold ores using a mixed solution of bromate, iron salt and acid, is a leaching process with the advantages of simple operation, fast leaching rate and excellent process feasibility. Its specific steps are as follows:

Crush and grind the gold ore until the fraction of particles passing through a 200-mesh sieve accounts for more than 80% by mass.

Add the leaching solution to the ore powder obtained in Step 1 at a mass ratio of 15~40 parts ore powder to 100 parts leaching solution. Conduct stirred leaching for 10~120 minutes under ambient temperature and pressure, with the stirring speed controlled at 100~800 rpm.

Filter the ore pulp obtained in Step 2, rinse the leach residue thoroughly, and recover gold from the collected filtrate.

This process is not only applicable to easy-to-process gold ores, but also delivers satisfactory leaching performance for high-sulfur, high-arsenic carbonaceous refractory gold ores. It eliminates the need for oxidative pretreatment, thus reducing the complexity of the leaching process and production costs. This gold leaching method features simple process flow, fast leaching speed and high gold leaching rate. Gold in the filtrate is easy to recover, the reagents used for leaching are non-toxic and harmless, and no toxic or hazardous substances are generated during the entire leaching process. Being environmentally friendly, this process holds promising application prospects in industrial production.

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