Flexibility in Recycling
In a recycling yard near Knoxville, TN in the USA, a MOBIREX MR 110 Zi EVO2 crushes concrete and asphalt in different applications.
Whether work involves a student dorm or a country road – changing applications in a single location are no problem for the MR 110 Zi EVO2. In the shortest of times, the mobile impact crusher switches from rubble to asphalt and starts work again immediately.
With around 40,000 students, the University of Tennessee Knoxville (UTK) is one of the largest state universities in the United States. Many of the students live on the campus in one of the numerous dormitories, one of which recently had to be demolished. The residual construction materials were delivered to a recycling yard from Crush LLC outside the city.
When crushing rubble, a challenge is presented by the foreign materials, such as iron reinforcements, wood, plastic, aluminum, etc. that are contained in the demolished concrete. With its adjustable magnet, the MR 110 Zi EVO2 offers a separation option even for large iron parts and, apart from this, the return conveyor that can be swung out for regular removal from the circuit of undesired lightweight materials. Both of these components can be controlled comfortably by remote control, for example, from the excavator.
The final product, approx. 200 tons an hour, is then used in road construction. Prescreening was omitted consciously in this application because of the low content of fines in the feed material. With a prescreen, however, output could have been increased by a further approx. 15% according to Cale Cameron, Operations Manager at Crush LLC.
A further advantage of the Mobirex EVO2 is its mobility. Both rubble as well as residual asphalt from road construction and asphalt mixing plants are stored in the recycling yard of Crush LLC. The plant can be moved and put back into operation in a few minutes. Thanks to its compact design with integrated secondary screening unit, the use of an additional screening plant is not necessary. This makes positioning in restricted space conditions simpler and also saves time and transport costs. The crushed asphalt is then added to the material mixture in asphalt production.
"We had an EVO1 (Mobirex) that processed one million tons; now we have the EVO2 that is approaching one million and, up to now, not a single broken rotor ledge."
Cale Cameron, Operations Manager Crush LLC
This is not the first Mobirex for Cale Cameron. With the MR EVO1, he has already crushed one million tons of material and the current EVO2 is well on track to reach this target. What impressed him in particular is the service life of the Mobirex and the fact that, up to the present day, not a single rotor ledge was broken on the plants. Responsible for this is the standard series overload protection that allows the impact toggles to retract when uncrushable material reaches the crushing chamber.