Engineering & Mining Journal

JUN 2016

Engineering and Mining Journal - Whether the market is copper, gold, nickel, iron ore, lead/zinc, PGM, diamonds or other commodities, E&MJ takes the lead in projecting trends, following development and reporting on the most efficient operating pr

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SCREENS 60 E&MJ; • JUNE 2016 www.e-mj.com Kiruna, the northernmost city in Swe- den, is home to the underground iron ore mine of the same name, operated by the state-owned company Luossa- vaara-Kiirunavaara AB (LKAB). Ore from the Kiruna mine is transported to the port city of Narvik, Norway, over a railway built more than a century ago specifcally for this purpose—and at the time, was the northernmost rail line in the world. The trains now traveling this route transport around 33 million tons of product per year, pulling up to 68 railcars per train. A special automated unloading station can unload each of these cars in fve seconds. Narvik is located on the Ofotfjord, north of the Arctic Circle, but the local climate is infuenced by the Gulf Stream, providing an average annual tempera- ture of 4°C (38°F). Consequently, the fjord remains free of ice almost all year round, and Narvik is where LKAB carries out direct loading of iron ore pellets onto ships. Recently, LKAB's existing facili- ty, with a processing rate of 6,000 tons per hour (t/h), was augmented by the ad- dition of a second plant rated at 9,000 t/h. Germany-based vibrating-technology specialist Joest worked closely with LKAB to design the new screening plant, which consists of a storage bunker system, six large double-deck vibrating screens with chutes, various connecting belt convey- ors and a crusher. The scope of delivery included detailed planning, project man- agement, installation and startup. The storage bunker measures 19 x 11 x 13 m and allows LKAB to deliver and store 1,600 m 3 of iron ore pellets ranging in size from 11 to 16 mm. Joest designed the system to ensure the bunkers are flled evenly and without loss of product along the way. The steel bunker, which weighs about 350 tons, is split into six equal segments. Each segment is ftted New Screening Plant Provides Capacity for Future Growth Joest successfully completes a project that enables LKAB's pellet handling and loading operation at Narvik to handle up to 15,000 t/h The recently completed, state-of-the-art plant includes six large double-deck vibrating screens and adds 9,000 t/h of capacity to LKAB's pellet-handling capacity at Narvik.

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