LKAB operates iron ore mines in Kiruna, Svappavaara and Malmberget in Norrbotten County, Sweden.
Most of the output is transported by rail to the ice-free Port of Narvik, a route named the Northern Circuit.
A minority of the ore is transported to Luleå on the Southern Circuit.
Located on the Baltic Sea, ore is shipped to Baltic customers, or delivered to furnaces operated by SSAB in Luleå and Oxelösund.
The Iron Ore and Ofoten Lines are 536 km (333 mi) long, including the branch to Svappavaara, with the route from Kiruna to Narvik being 170 km (110 mi), and from Malmberget to Luleå being 220 km (140 mi).
Operations are handled by LKAB's subsidiary Malmtrafik i Kiruna (MTAB) in Sweden, and Malmtrafikk (MTAS) in Norway.
As of 2010, six pairs of the first batch Iore locomotives operate 11 to 13 trains daily in each direction on the Northern Circuit, and the remaining three pairs of the first batch operate five to six trains on the Southern Circuit.
The four pairs of second-batch locomotives will replace Dm3 locomotives on the Northern Circuit by 2011.

The trains hauled by Iore are 68 cars long and weigh 8,600 tonnes (8,500 long tons; 9,500 short tons).
From Riksgränsen on the national border to the Port of Narvik, the trains use only a fifth of the power they regenerate.
The regenerated energy is sufficient to power the empty trains back up to the national border.
Although the trains and hopper cars are all owned by LKAB, the line is owned by the Swedish Transport Administration and Bane NOR.
The Iron Ore and Ofoten Lines are also used by passenger and container trains.
LKAB operates iron ore mines in Kiruna, Svappavaara and Malmberget in Norrbotten County, Sweden. Most of the output is transported by rail to the ice-free Port of Narvik, a route named the Northern Circuit. A minority of the ore is transported to Luleå on the Southern Circuit. Located on the Baltic Sea, ore is shipped to Baltic customers, or delivered to furnaces operated by SSAB in Luleå and Oxelösund. The Iron Ore and Ofoten Lines are 536 km (333 mi) long, including the branch to Svappavaara, with the route from Kiruna to Narvik being 170 km (110 mi), and from Malmberget to Luleå being 220 km (140 mi). Operations are handled by LKAB's subsidiary Malmtrafik i Kiruna (MTAB) in Sweden, and Malmtrafikk (MTAS) in Norway. As of 2010, six pairs of the first batch Iore locomotives operate 11 to 13 trains daily in each direction on the Northern Circuit, and the remaining three pairs of the first batch operate five to six trains on the Southern Circuit. The four pairs of second-batch locomotives will replace Dm3 locomotives on the Northern Circuit by 2011.
The trains hauled by Iore are 68 cars long and weigh 8,600 tonnes (8,500 long tons; 9,500 short tons). From Riksgränsen on the national border to the Port of Narvik, the trains use only a fifth of the power they regenerate. The regenerated energy is sufficient to power the empty trains back up to the national border. Although the trains and hopper cars are all owned by LKAB, the line is owned by the Swedish Transport Administration and Bane NOR. The Iron Ore and Ofoten Lines are also used by passenger and container trains.
Iore