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Method for Extracting Gold from Gold Tailings

     

The method for extracting gold from gold tailings comprises the following steps:

1)Mix gold tailings sand with water to prepare ore pulp;

2)Subject the ore pulp to ultrafine treatment to reduce the particle size to below 2 μm. A chemical reagent containing functional groups capable of forming coordination compounds with gold ions can be added either before or during the ultrafine treatment, so that the chemical complexation reaction proceeds synchronously with the ultrafine treatment; alternatively, the chemical reagent can be added after the ultrafine treatment to allow sufficient complexation reaction to complete;

3)Carry out solid-liquid separation and retain the liquid phase, which contains gold complex ions.

This extraction method boasts mild operating conditions, low production cost, low reagent consumption, fast extraction speed, and an extraction rate as high as 98%. Furthermore, the solid residue left after extraction can be further used to produce ceramic tiles, mineral admixtures for concrete and lightweight hollow wall materials. After drying, it can also serve as a filler for rubber or plastics, thus realizing full reutilization of resources and turning waste into wealth.

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