Liebherr has presented a duo of machines fitted to meet the requirements of future mines at Bauma 2019: the R 9200 E and the T 236. When working together, the R 9200 E and T 236 improve the environmental footprint of mining operation. The R 9200 E in face shovel configuration can easily fill a T 236 in five passes.
Liebherr is offering Bauma 2019 visitors the chance to start a 200 t mining excavator live, by flipping a giant switch. The company’s technical teams overcame the challenge of routing an electric cable to the excavator that can support the 6000 V needed to bring the machine to life, while ensuring the optimal level of safety for the spectators.
R 9200 E – 100 % electric driven 210 t excavator
The R 9200 E has been designed to support the requirements of the mining industry. With a rated output of 850 kW (1,139HP), the electric 210 t R 9200 E balances performance with environmental consciousness. There is no human and environmental exposure to diesel emissions and noise, a longer engine life cycle and up to 25% lower maintenance costs compared to a diesel excavator. In order to reduce starting inrush current, all Liebherr Mining electric excavators are equipped with autotransformer starting devices to avoid disjunctions of the mine’s electric network while starting the excavator.
As mining customers work around the globe in demanding conditions, the electric drive is advantageous. An electric excavator experiences less power losses than a diesel engine at high altitude and is much easier to start in cold climate.
Electric drive excavators have a cable reel option. This offers the machine a better mobility and less staffing is required on site to move the cable. The reel is totally autonomous and has a capacity of 245–300 m depending on the excavator type.
R 9200 E at Eurovia
The Lausitzer Grauwacke mine is located in Lieske in the Northeast of Germany, approximately 70 km north of Dresden, and since 2010, it has part of the EUROVIA group. The extracted greywacke is a hard sandstone; highly resistant to frost, so is used in mineral mixtures for highway, railway and port constructions. This specific mine is one of a few certified suppliers for high speed rail track ballast.
T 236 – diesel electric driven 100t mining truck
The T 236 has the ability to drive on steeper inclines compared to mechanical trucks. This allows the mines to plan for steeper ramps and therefore reduce their strip ratio while adaptating to the geology.
The T 236 takes advantage of Liebherr’s electric drive system innovations with the introduction of the vertically integrated Litronic Plus Generation 2 AC drive system. The T 236 performs its job with continuous power to ground to maximise speed on grade.
Since the first presentation of the concept to the public at MINExpo 2016 in Las Vegas, the T 236 has completed its testing phase and is today operating at the Erzberg Iron mine in Austria and another unit started its operation in South Africa.
Read the article online at: https://www.globalminingreview.com/product-news/09042019/liebherr-mining-goes-electric/