Recycling tech supplier Erdwich has developed a ‘unique’ classifier plant for non-ferrous metals which separates heavy from light materials. This realises the complete recovery of valuable metals.
‘The term separator is generally used to describe a device used to classify solids. By utilising the different sinking speeds of the various substances in an air stream, these are subdivided and separated according to defined criteria such as particle size, density or inertia,’ explains Florian Boehm-Feigl, chief technical operator at Erdwich. ‘One of our projects includes a classifier system for non-ferrous metal granulate.’
This enables dust, pure granulate, foils, fluff and other light material from non-ferrous metal to be separated. ‘It is important to extract the light material as reliably, easily and as maintenance-free as possible in order to either further separate the non-ferrous metal or sell it’, Boehm-Feigl observes.
Erwich’s solution manages a throughput rate of up to 5 t/h for a wide variety of material mixtures such as aluminum, iron, copper and other non-ferrous metals as well as wood, plastics, fabric or dust. The company notes that the grain size of the metal must not exceed a diameter of 100 mm.
Metal recyclers can rely on the separating plant – which is 7,146 mm high and between 5,616 mm and 7,461 mm wide – in combination with an RM1350 twin-shaft ripper as a pre-shredder for non-ferrous scrap.
Erwich remarks there are six different, automatic sequences can be monitored and controlled. These are the control cabinets for the granulator, magnet technology, non-ferrous separation technology and X-ray separation technology as well as the dust filter system and the RM 1350 pre-shredder.
The classifier system thus enables the expansion of an existing large-scale plant and is installed directly under the conveyor belt discharge of a screening drum. ‘By classifying various materials such as aluminum, copper or other metallic alloys, the material is dedusted and freed of foreign matter and achieves considerably higher prices in resale,’ Erdwich points out.
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