Kongsberg Silver Mines
The silver mines of Kongsberg, in Buskerud county in Norway, constitute the largest mining field in Norway, with over 80 different mines. It was the largest pre-industrial working place in Norway, with over 4,000 workers at its peak in the 1770s and supplied over 10% of the gross national product of the Danish–Norwegian union during its 335-year-long history: over 450,000 man-years were expended in the production.
Outotec
In spring 2014, Outotec received an order worth EUR 50 million from Alumina do Norte do Brasil (known as Alunorte). Majority-owned by Norwegian aluminum producer Norsk Hydro ASA, Alunorte's alumina refinery is the largest in the world. A new filtration plant was ordered for the refinery, located in Barcarena in Northern Brazil, to enable dry storage of caustic residue. The plant is due to be started up in March 2016.