© VA Erzberg GmbH
VA Erzberg stated: “Up to now, the transport of more than 13 million t of rock per year has required enormous amounts of energy of around 4.5 million l of diesel per year. It will be 3 million l less diesel in the future when the successors to the mechanical diesel trucks currently in use start operating at Erzberg.”
Successful test phase
Since signing the development contract for the trolley system at bauma 2019, VA Erzberg has been testing the modified T 236 diesel-electric truck in its siderite iron ore mine in Eisenerz/Austria. The tests were conducted on a 500 m long test segment.
2 T 236 on the track with a small radius
© VA Erzberg GmbH
Josef Pappenreiter, Technical Director of VA Erzberg says, “There are only a few companies in the world that use overhead line technology for their trucks. However, we realized very quickly that the existing technology would not work for us. Our newly developed technology is different from everything previously available on the market in terms of both the overhead line system and the vehicle technology itself. This could only be developed with our cooperative and innovative partner Liebherr Mining in Colmar.”
Extended track with new challenges
The new extended track for a fleet of six Liebherr T 236 will have a length of 5 km with the upper section at around 1055 m above the sea level. VA Erzberg will be observing how the weather conditions will affect the overhead lines during the winter in the Eisenerz Alps. Peter Schimek, Project Manager at the mine added: “Another challenge is the entire electrical engineering as all six T 236 can be connected to the overhead lines simultaneously in several places”.
When connected to the overhead power lines in trolley mode, the full power capacity of the electric wheel motors of the T 236 can be translated into speed on grade while the diesel engine idles, thus reducing emissions and fuel consumption. In the long term, VA Erzberg expects to save around three million liters of diesel and 4200 t of CO₂ per year. Furthermore, the emission of nitrogen oxides and fine dust will also be reduced.
Josef Pappenreiter comments: “With this technology we expect a sustainable energy-optimized production. Around 13 million t of rock are currently transported in the mine every year. The cost factor for ore production is correspondingly high. In addition to the positive environmental effects, an investment in this new technology also secures the sustainable extraction of the important raw material iron ore for domestic steel production. A total of around 20 million € will be invested in the project.”