Carbon-in-Leach (CIL)

CIL combines leaching and adsorption in the same tanks, reducing capital costs by eliminating separate leach vessels. However, this integration creates a more demanding environment: the carbon must compete with the ore for freshly dissolved gold. In ores containing natural carbonaceous matter (preg-robbing), this competition is especially fierce. CIL carbon must prioritize fast adsorption kinetics (R-Value) above all other specifications—gold must be captured the moment it dissolves, before the ore’s native carbon can sequester it irreversibly.