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Nordkalk, a leading limestone company, delivers essential raw materials to numerous industries. Its solutions contribute to clean air and water as well as productivity of agricultural land. Nordkalk's biggest Finnish production site is in Lappeenranta. There is a quarry, a grinding plant, two flotation plants and a sales office. Operations in Lappeenranta started in 1910.
Nordkalk has been running sensor based sorting systems for several years at the Lappeenranta location. Due to increasing demands and the end of lifetime of the existing sorter for the fraction +40 – 80 mm, Nordkalk decided to replace this line. After intensive test works Nordkalk decided to use the REDWAVE 1300 ROX CC double camera sorter. The sorting task is to sort out the dark and black particles from white limestone.
At the REDWAVE test center in Gleisdorf, Nordkalk made intensive test works. After these positive trials, Nordkalk visited the reference plant of company LEUBE in Golling, Austria. LEUBE operates since several years 2 REDWAVE ROX Mineral sorter with combined Color and NIR sensors. The installation of the sorter was made by Nordkalk. The REDWAVE 1300 ROX CC Mineral Sorter is in operation successfully since August 2017 and it sorts the limestone according to color (dark and black from white).
Mr. Vesa Pekki, planning and project manager at Nordkalk Corporation
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