For developing the Helix Dumper, an innovative wagon solution that is highly durable and far more efficient than other ore wagon offerings, Kiruna Wagon has been named a finalist for the Swedish Steel Prize 2017. The Helix Dumper is a lightweight wagon structure with a high payload and an ingenious offloading solution that has an unloading speed of 25 000 t/h, which is twice that of other systems. The design utilizes high-strength steel extensively in the structure of the wagon as well as for the stiffeners around the wagon body and for the top rail of the wagon. Wear-resistant steel is used in the two arches at the offloading site. When comparing with other systems, a complete unloading system for the Helix costs 1/7th of what a rotational wagon cost. Furthermore, the Helix uses parts of the potential energy of the ore to push the wagon forward as it unloads. This means no extra energy is required and there is much less dust with almost no noise.
The jury’s motivation for selecting Kiruna Wagon as one of four finalists for this year’s Swedish Steel Prize, which will be awarded during a ceremony in Stockholm/Sweden on May 11, is: “Kiruna Wagon has developed an innovative dumper wagon system for long-haul rail transport and efficient unloading of minerals. Use of advanced high-strength structural and wear-resistant steels made it possible to design lightweight wagons combined with a stationary Helix terminal for on-the-fly rotary unloading. With its nearly doubled unloading rate, the Helix system is superior to all conventional solutions and solves many problems related to sticky aggregates. The terminal system is very cost effective, in terms of both investment and operation.”