15 September 2015

Kiruna Wagon welcomes guests from Australia

In September we had the pleasure of welcoming an Australian mining company to Kiruna Wagon. They visited us for a demonstration of our pioneering Helix Dumper.

The proposed project involves transporting large volumes of iron ore approximately 160 km by rail to the export facility and the focus is thus on finding a wagon that offers both a high carrying capacity and a high unloading capacity. In principle, it is about choosing between Kiruna Wagon’s Helix Dumper with rolling discharge and a rotary car dumper that usually unloads 1-4 stationary wagons at a time.

The rolling discharge of the Helix Dumper has the advantage of being gentle on the wagon couplings, especially compared with the repeated start and stop movements that occur during stationary unloading. From an energy standpoint, it is also an advantage that the Helix Dumper can discharge its load close to ground level. A rotary car dumper empties its load sometimes as deep as 15 metres into the ground and the ore must then be transported up to ground level, which means high energy costs due to the enormous tonnage involved.

The Helix Dumper system also offers a huge annual total capacity thanks to its fast and simple unloading station. This is an important factor if one anticipates substantial increases in production ahead.

While the Helix Dumper is a more complex wagon, its unloading station comes to a much lower capex cost than that of a rotary car dumper. And it will not be a bottleneck in the system.

For the Australian market, a wagon designed for 40-tonne axle load would be developed.

During discharge, the body of the Helix Dumper is rotated 148 degrees while the chassis remains on the rails.

During discharge, the body of the Helix Dumper is rotated 148 degrees while the chassis remains on the rails. The rotation, along with the rounded shape of the body, creates optimal conditions for efficient discharge.