The MOBIREX MR 110 Z EVO2 convinces in changing applications
With several quarries and recycling yards around Leeds, Mone Brothers Ltd. looks back on a long tradition in mineral processing. Since its foundation in 1965, the company has rapidly developed from a pure construction equipment rental business to one of West Yorkshire’s leading suppliers of construction materials and recycling services. At minute intervals, dump trucks roll onto the almost 2.5 ha Fireclay recycling yard, bringing construction waste from demolition work and construction sites and taking broken material and material freed of foreign matter back with them. On average, over 300 000 t of this material is processed here every year. While the broken bricks are processed into hard stone gravel according to the British standard 6F2 and are mainly used as a gravel base layer in road construction, the recycled concrete broken bricks are used as an even higher quality type 1 frost protection layer. In addition, Mone Bros. Ltd. cooperates a lot with the local utility market and supports with its material the expansion of the electricity, water and gas network. The companies bring their building rubble and take processed Type 1 back with them.
The different feed materials and required quality standards also affect the production process. For the 6F2, a closed circuit can be dispensed with due to the higher permissible oversize particle content, thus increasing the feed capacity. The MR 110 Z EVO2 from Mone Bros. Ltd. thus achieves over 280 t/h. For Type 1, the plant changes its location in a few minutes and the re-screening unit is installed just as quickly in approx. 15 minutes. Thanks to the integrated oversize particle recirculation, the result is still over 250 t/h of classified product, which also meets the highest standards in British road construction.
Typically, these products are produced in the United Kingdom with jaw crushers, of which Mone Bros. Ltd. also still have one from KLEEMANN in use in their quarry – the decision in favour of an impact crusher was nevertheless made for good reason. Firstly, according to Michael Coleman, Managing Director of Mone Bros. Ltd. the product quality has increased significantly. In one crushing stage, the impact crusher creates a grain shape that a jaw crusher cannot reach without a second crushing stage. The slightly higher proportion of fines helps to bind the material in later use and therefore corresponds to the required quantity. In addition to the product quality, the higher performance of the MOBIREX also stands out. While jaw crushers in recycling applications offer a recommended crushing ratio of 7:1, impact crushers achieve a ratio of 15:1, thus enabling a higher task size and considerably higher output. “The performance is really fantastic and a real asset to our business,” says Michael Coleman, Managing Director, Mone Brothers Ltd, “so it’s easy to see why Mone Bros. Ltd. replaced two of their jaw crushers with one impact crusher. This reduced the already low operating costs due to the diesel-direct electric drive concept of the KLEEMANN EVO crushers by another 15 %.
