Activated Carbon for Gold Recovery
Steam-activated coconut shell carbon is a powerful tool in the recovery of gold and silver, contributing directly to profitability by maximizing metal yield. CS Corporation offers premium-grade activated carbon specifically developed for precious metal recovery, produced from high-quality coconut shells and processed through advanced gasification techniques. These carbons deliver superior performance through high adsorption capacity and rapid kinetics, effectively capturing gold and silver from solution. Their exceptional durability and low attrition rates allow for repeated regeneration, reducing carbon losses and enhancing operational cost-efficiency. With optimized particle size distribution, they ensure seamless integration into gold recovery systems, while their efficient desorption characteristics enable fast and complete metal extraction in elution circuits.
Activated carbon is central to gold processing, with three main recovery methods—CIP, CIL, and CIC—each leveraging its unique adsorption properties to extract gold from ore with high efficiency:
Carbon-In-Pulp (CIP)
In the gold extraction process, the ore is finely ground and processed using the carbon-in-pulp (CIP) method. Gold is dissolved in a cyanide solution within large leaching tanks, and granular activated carbon is introduced to adsorb the dissolved gold. Once saturated, the gold-loaded carbon is separated from the slurry using coarse screening techniques. This method typically uses a series of five to six agitated tanks arranged in a staged countercurrent flow, maximizing the contact time and efficiency of gold adsorption onto the carbon, leading to high recovery rates.
Carbon-In-Leach (CIL)
The carbon-in-leach (CIL) process integrates leaching and gold adsorption into a single step, eliminating the need for separate leach and adsorption tanks. Activated carbon is introduced directly into the leach tanks, allowing it to adsorb dissolved gold as it forms in the cyanide solution. This approach is especially effective for ores containing native carbon, which can otherwise interfere by competing for gold adsorption. Using activated carbon with a higher affinity for gold enhances recovery and improves overall extraction efficiency.
Carbon-In-Column (CIC)
The carbon-in-column (CIC) method involves directing the gold-bearing cyanide solution upward through fluidized bed columns packed with activated carbon. This up-flow design enables effective gold adsorption, even when the solution contains 2–3% solids by weight. Due to their ability to handle high solid content, these systems are ideal for heap leach applications.
