Impact crusher MOBIREX MR 100 NEOe in electrical operation
Successful deployment on innovative all-electric demolition site
Erlangen in Franconia is home to a very special building site: On the site of a former administrative building, two buildings with a surface area of around 3300 square metres are being demolished. The extraordinary feature: All vehicles and machines from excavators and wheel loaders through to the crushing plant are operated electrically. This is probably the first fully electric demolition site in the world.
Foto / Photo: KLEEMANN GmbH
No diesel, exhaust gases, hardly any noise. Instead, electric motors hum quietly, powered by a specially constructed power infrastructure. An all-electric impact crusher MOBIREX MR 100 NEOe from Kleemann is used for material processing on site.
“In our eyes, the crushing plant differs significantly from others – especially with regard to its low starting currents”, reports Michael Metzner, Managing Director of Metzner Recycling and worksite manager. “This feature was a decisive factor in choosing to deploy the plant”.
Infrastructure as the key
In order to implement the idea of an “electric building site” that arose during the ongoing project, the energy supply first had to be expanded. “We had to set up a new transformer station, underground cables, and charging stations”, says Michael Metzner. Although basic power was available on site, it was not sufficient to operate all machines simultaneously. The power source is green electricity from the Erlangen municipal grid. The aim is to achieve significant CO₂ savings compared to conventional demolition sites through the use of electric machines and optimised recycling of materials on site. In addition, noise and particulate emissions on site are significantly reduced.
Efficient processing, high-quality final product
The impact crusher MOBIREX MR 100 NEOe on the work site processes a recycling mixture of bricks, concrete, asphalt and cast concrete with a feed size of 0 to 300 millimetres. The result is a pure grain mixture. “The material produced has a lower content of fines than with other impact crushers known to us. This significantly improves recyclability and makes an important contribution to the production of high-quality recycled building materials”, says Michael Metzner. The produced fractions – 0–4 mm and 4–16 mm – can be used, among other things, as aggregates for new concrete. Around 96 percent of the demolition material should be reused directly. Important and helpful special equipment at the crushing plant includes a wind sifter and a magnetic separator.
Strong signal for the industry
Demand for all-electric crushing and screening plants is increasing, especially in urban areas. The advantages are obvious: fewer emissions, less noise, less lorry traffic thanks to the reuse of recycled material directly on the work site. “We see this as the future of the building industry,” Michael Metzner concluded. “Emissions-free demolition, in particular, will open up new avenues, especially for inner-city projects”.
Facts and figures on the MOBIREX MR 100 NEOe
- Feed material: Recycling mixture of bricks, concrete, asphalt, cast concrete
- Feed size: 0–300 mm
- Final product: 0–45 mm
- Output: 170–210 t/h
- Power supply: Fixed connection via transformer station, operation via underground cables
- Equipment: Magnetic separator, wind sifter
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