LKAB IORE class electric locomotive, known for being one of the most powerful in the world, shown hauling iron ore through a mountainous landscape. The Iron Ore Line (Malmbanan) in Sweden and Norway, primarily used for transporting iron ore from LKAB's mines to the ports of Luleå or Narvik. locomotives are typically used in pairs to pull long, heavy trains consisting of 68 hopper cars, weighing approximately 8,600 tonnes per train.