Located in Raahe, Nordic Mines Oy is a mining company which also conducts exploration. The company is owned by Swedish Nordic Mines Ab which, as of 30 June 2005, is headquartered in Stockholm. The mine exclusively produces gold. The company’s production was suspended on 26 March 2014.
The production process of the Laiva mine of Nordic Mines Oy comprises the following major phases: excavation, crushing, gravitational separation, flotation concentration, cyanide concentration, and the processing of tailings. Broken ore is fed via a jaw crusher to a temporary stockpile and, from there, to autogenous grinding. After grinding, material is led to a fast flotation cell and to gravitational separation. Separated materials are led to separate dissolution circuits (low and high grade) in which gold is dissolved using cyanide. Dissolved gold is recovered using active charcoal. Charcoal is transferred for further processing at the Como plant where gold is dissolved out of charcoal and conducted to an electrolytic process and then further to a casting process. After the cyanide dissolution process is complete, tailings waste is pumped to the areas designed to them.
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