Application of Activated Carbon in Gold Extraction


Activated carbon plays an indispensable role in the gold extraction industry.


I. Extraction Processes

Currently, Carbon-in-Pulp (CIP) and Carbon-in-Leach (CIL) are the two mainstream gold extraction processes. In both methods, activated carbon is added to the cyanide pulp to adsorb dissolved gold-cyanide complexes.


II. Requirements for Activated Carbon

Activated carbon used for gold extraction is typically derived from coconut shells and possesses the following characteristics:


High hardness: Resistant to breakage within the agitated pulp


Uniform particle size: Common specifications include 6×12 mesh and 8×16 mesh


Highly developed microporosity: Excellent adsorption capacity for gold-cyanide complexes


III. Downstream Processing

Activated carbon saturated with gold (known as gold-loaded carbon) undergoes processes such as desorption, electrolysis, and smelting to ultimately yield gold ingots. After desorption, the activated carbon is regenerated and can be recycled back into the adsorption process.



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