Bunting overband magnets and ECS technology to ensure maximum metal recovery for CRS NI in the UK
After an extensive review of recycling equipment suppliers at the end of 2020, CRS selected Bunting-Redditch to supply the metal separators. The configuration of the waste processing plant led to the selection of three ElectroMax overband magnets and one eddy current separator with a vibratory feeder.
The EMAX150 ElectroMax overband magnets recover steel cans and other ferrous metals from the conveyed waste. One is suspended inline with a conveyor, over a non-magnetic head pulley, with the remaining two positioned across the conveyors. All ElectroMax models feature compact, air-cooled, high-powered electromagnets with heavy-duty self-cleaning rubber belts.
In operation, the waste passes under the electromagnet on a conveyor where any ferrous metal attracts up and out of the burden. The self-cleaning belt transfers captured ferrous metal out of the magnetic field, discarding into a collection area. Each EMAX150 weighs 2.8 tonnes and is 2750mm long, 460mm high and 1590mm wide.
In this project, two of the conveyors are 1200mm wide for the cross-belt installation, with the third being 1500mm for the in-line position. There are three size fractions: <50mm, 50-150mm and 150-400mm with the burden depth on all three conveyors averaging around 300mm.
The 1500mm wide eddy current separator, with integrated vibratory feeder, is located later in the process and recovers non-ferrous metals such as aluminium cans. The HIC Model (high-intensity concentric) features a 300mm diameter magnetic rotor. The vibratory feeder regulates an even and controlled feed of waste material onto the faster running eddy current separator conveyor belt, which then transports the waste into the alternating magnetic field of the rotor.
The 1500mm wide eddy current separator and vibratory feeder combined system weighs 3.9 tonnes and is 5.8 metres long, 2.6 metres wide and 2.3 metres high. 15 tonnes per hour of mixed waste with a maximum particle size of 50mm feeds through the separator. The waste contains approximately 1 percent non-ferrous metals, which are predominantly aluminium beverage cans.