At the same time as the cyanidation leaching, the gold extraction method of adsorbing gold by activated carbon is called a carbon leaching method. The method of cyanide leaching and carbon adsorption is carried out in the same tank, so that the number of leaching tanks can be completely omitted or greatly reduced. Since the time required for leaching is longer than the adsorption, and the appropriate adsorption rate is only achieved when the concentration of gold in the slurry reaches a certain level. Therefore, the first tank or the first two tanks are usually used as separate leaching tanks, and the remaining tanks are used as leaching adsorption tanks.
The main advantage of the carbon leaching method is that it can save infrastructure and production costs; the dissolution rate of gold is accelerated due to adsorption while leaching, and the recovery rate of ore gold which is easy to dissolve gold is in other methods. However, since the leaching takes longer than the adsorption time, the density of carbon in the adsorption tank of the carbon leaching method is high, and the amount of gold accumulated in the system is also large, and the quality and operation requirements of the carbon are more strict. Otherwise, the loss of gold is caused by the generation of more fine carbon by abrasion.
Gold extraction by carbon leaching is the most ideal method for easy leaching materials.
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