Processing Plant

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The Kittila mineral processing plant began to operate in the last quarter of 2008 with the commissioning of the crushing, flotation and grinding circuits followed closely by the autoclave and downstream process. The plant is designed to treat 1,000,000 tonnes/year at a mill feed throughput of 124 tonnes/hour, and the design criteria have been confirmed by the plant’s operation.

Kittila ore contains organic carbon, which hinders gold recovery by offering sites on its surfaces for the precipitation of gold-chloride complexes, during the pressure oxidation operations. Past laboratory test work has shown that the organic carbon contained in the sulphide concentrate from Kittila negatively affects the gold extraction downstream, in the pressure oxidation (POX) and carbon-in-leach (CIL) circuits.