RECYN PROCESS

APPLICATION GREEN GOLD TECHNOLOGY

The RECYN™ PROCESS has been proven commercially effective in:

• Precious Metal Recovery • Base Metal Recovery • Cyanide Recovery.

The RECYN™ Process recovers almost all free and complexed cyanides and metals directly from either tailings slurry or solutions.

FLOWSHEET

Directly following the CIL circuit the slurry flows through several stages of adsorption contactors. The resin stream is pumped countercurrent to the slurry flow to maximise resin loadings and minimise tails values. Loaded resin is transferred either as a batch or continuously to the elution section of the plant. Metal elution and cyanide elution occur in separate columns at ambient temperature. Stripped resin is returned to the final adsorption stage. The relative flows of loaded resin to the metal or cyanide recovery sections depends on the CIL tailings solution cyanide and metal levels. Metal recovery typically involves either electrowinning to remove gold or precipitation to remove copper and other metals. Cyanide recovery involves volatilization and scrubbing to form a concentrated cyanide solution that can be returned directly to the leach circuit. The detoxified slurry is discharged to the tailings dam.