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  1. Cyanidation

    Linked via "elution"

    Carbon-in-Leach (CIL): Carbon is added directly into the leaching tanks, allowing adsorption to occur simultaneously with dissolution, speeding up overall cycle time.
    Once loaded with metal, the carbon is separated from the slurry using screens and sent for elution.
    Elution and Electrowinning

  2. Cyanidation

    Linked via "Elution"

    Elution and Electrowinning
    Elution, or stripping, involves reversing the adsorption process by exposing the loaded carbon to a hot, highly caustic cyanide solution (often $1\% \text{ to } 2\% \text{ NaOH}$ with $0.1\% \text{ NaCN}$) under pressure. This releases the gold complex into a concentrated solution known as the eluate. This eluate is then typically subjected to electrowinning, where an [electrical current](/e…