Flexibility in Recycling
In a recycling centre near Knoxville, TN in the USA, a Mobirex MR 110 Zi EVO2 crushes concrete and asphalt in various applications.
Whether this involves student halls of residence or highways – changing applications at a single location are no problem for the MR 110 Zi EVO2. In the shortest possible time, the mobile impact crusher switches from rubble to asphalt and resumes work immediately.
With a total of 40,000 students, the University of Tennessee Knoxville (UTK) is one of the largest public universities in the United States. Many of the students live on the campus in one of the numerous halls of residence, one of which had to be demolished recently. The residual construction materials were transported to a recycling centre outside the city run by Crush LLC.
Challenges are presented during the crushing of concrete in the form of foreign material, such as iron reinforcement, wood, plastic, aluminium, etc., which are embedded in the remaining concrete. In this regard, the adjustable magnet of the MR 110 Zi EVO2 provides an option for separating even large iron parts. Furthermore, the return conveyor that can be swivelled out can be used for regular clearing of undesired lightweight materials from the circuit. Both can be controlled conveniently by remote control, for example from the excavator
Knoxville, Tennessee, USA
Concrete and asphalt
0 - 750 mm (concrete), 0 - 600 mm (asphalt)
Final grain size
0 - 30 mm (concrete), 0 - 16 mm (asphalt)
Tonnage per hour
200 t (without prescreen)
The final product - approx. 200 tons of which is produced per hour - is then used again in road construction. A conscious decision was made in this application to omit prescreening because of the low share of fines in the feed material. However, with a prescreen it would have been possible to increase output by another approx. 15%, said Cale Cameron, Operations Manager at Crush LLC.
A further advantage of the Mobirex EVO2 is its mobility. The recycling centre of Crush LLC is used to store rubble as well as asphalt from road construction and asphalt mixing plant material. In only a few minutes, the plant can be moved and put back into operation. Thanks to the compact design with integrated secondary screening unit, an additional screening plant does not have to be used. This makes positioning in limited space conditions easier and also saves time and transport costs. The crushed asphalt is then added again to the material mixture in asphalt production.
We have an EVO1 that has a million tons through it. We have the EVO2 that is approaching a millions tons - and till today we have never broken a blow bar
This is not the first Mobirex for Cale Cameron. With an MR EVO1, he has already crushed one million tons of material; the EVO2 currently in use is also well on the way to reach this target. What impresses him in particular is the service life of the Mobirex and the fact that during all this time he has never experienced a broken rotor ledge. The standard series overload protection is responsible for this, which allows the impact toggles to draw back when uncrushable material enters the crushing chamber.