Ity Carbon-in-Leach Gold Plant

Africa, Côte d'Ivoire
The Ity Gold Mine in Côte d'Ivoire has been in operation for more than 20-years, previously as a heap leach operation. Recent construction of a carbon-in-leach plant has allowed for an increase in the resource base. The project scope for Lycopodium included development of the treatment plant, associated services, starter and permanent camp and infrastructure.

The process plant is designed for a nominal 4.0 Mtpa (9,000 tpd) throughput on the life of mine. The design has allowed the nominal throughput to be achieved in 8,000 operating hours per year.

The flowsheet comprises a primary jaw crusher feeding a surge bin and dead stockpile and then to a SABC comminution circuit, producing a target P80 90 µm grind size.  A gravity circuit will be provided within the milling area and discharge to an ILR.  Pre-leach thickening and a cyanide leach and adsorption circuit is also included along with a split AARL 18.0 t elution circuit that will recover the gold for electrowinning.

The leach tails will pass to a cyanide destruction circuit using the SMBS / air technology to ensure plant tailings comply with the International Cyanide Management Code (< 50 ppm WAD cyanide).  The leach feed thickener overflow will provide cyanide free water for use in the milling circuit, while decant return from the tailings dam will supply process water.

A moderate level of automation and remote control has been provided, to ensure safe operation of the plant and to control process conditions for optimum recovery, while still requiring manual inspection of equipment before starting.

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