D + H Verwertung place their confidence in mobile screening and crushing plants

D+ H Verwertung GmbH has been active in the waste management industry since 1996 and concentrates on the processing of building rubble, mixed soil waste and mixed building  waste. Several hundred tons of residual construction materials arrive at the company premises every day. To satisfy the good order situation, three new crushing and screening plants were procured from Kleemann in the last three months.

In November 2016, the Wirtgen Group subsidiary in Windhagen provided the D + H Verwertung GmbH with a mobile jaw crusher MC 110 Z EVO as a demonstration plant. “In this manner, we were able to run the Kleemann jaw crusher parallel to our previous crushing plant and discovered that the MC 110 Z EVO had a considerably higher output although the jaw crusher itself is smaller”, said Manfred Grünberg, Managing Director of D + H Verwertung GmbH. Subsequently, the decision to procure the MC 110 Z EVO by D + H was an easy one, because, in comparison, the jaw crushing plant is not only more robust but also offers effective prescreening, thanks to an independent double-deck prescreen. Together with the Kleemann material flow concept CFS, this guarantees higher product quality and output. For the operators, plant operation is simple via the integrated touch panel in the control cabinet and via the radio remote control.

Another positive factor for Grünberg was service and support from the Wirtgen Group subsidiary in Windhagen. In January 2017, the MOBISCREEN MS 21 Z was already put into operation at D + H as a demonstration plant. In comparison to the previous screening plant, this plant also achieved an increase in output combined with improved fractionation of the recycling material. Due to the good performance, a second MS 21 Z was put into operation already in the middle of March. “Thanks to all-round work platforms, the screen decks are easily accessible and can be adjusted quickly by the operators,” said Thomas Verhuven, Site Manager at D + H. Both plants are very quiet to operate, which also facilitates the certification process.

Depending on the order situation, the recycling yard receives 500-3000 tons of residual construction materials per day, for example, building rubble and rubble mixed with soil, via two weighbridges. As soon as the material is ready to be screened, it is loaded onto one of the two scalping screens MS 21 Z. The screens differ only with regard to the screening surface. One plant uses a finger screen surface to screen mainly cohesive feed material and creates three fractions: 0-30 mm, 30-75 mm and 75-x mm. The second plant is provided with a punched plate and screens more sandy material into grains of 0-18 mm, 18-50 mm and 50-x mm. The stone-free and unmixed material is subsequently transported for further utilization depending on the order.

On the other hand, the screened oversize grain is directly further processed with the MC 110 Z EVO that crushes the material to particle sizes of 0-45 mm. Integrated hopper extensions on the feed hopper facilitate feeding. For an exact final grain size, the material is screened by a classifying screening plant arranged downstream and washed in a float-sink process. The material is then conveyed by a conveyor belt to the stockpile and the oversized product is directed back to the MC 110 Z EVO by the oversize grain returning system. D + H’s customers use the RCL recyclate 0-45 for roadbeds, filling work or road building.

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