Shredder

Every year sees the accumulation of millions of tonnes of unwanted consumer goods in Germany—from old cars and electric hobs, washing machines, dishwashers to lightweight mixed scrap in the form of bicycles and bed frames.

Rohstoff Recycling Osnabrück GmbH uses a shredder for recycling valuable metals. This plant has been in operation since 1975 but has been subject to ongoing modernisation over the years and complies with the state of the art in terms of environment technology.

Technical process
By means of crushing and various other sorting procedures, scrap is processed in such a way as to enable the iron content to be used as a valuable raw material in steel mills. The heart of the shredder plant is represented by a swing-hammer crusher powered by a 1,500 kW motor. The input material is crushed via hammering and thus prepared for the subsequent sorting processes.
A complex dual-level air separation process cleans the crushed input material which is then referred to as light shredder fraction and still currently disposed of in dumping grounds. Owing to the high thermal value, recycling for energy purposes will be striven towards in future.
By means of magnetic separation, the steel scrap is separated and then sold to steel mills as a valuable raw material. The residual fraction is referred to as heavy shredder fraction. As it contains many valuable metals such as copper, aluminium and zinc, it is processed within the framework of our own NF separation. The metals can then be directed to a further metallurgical process.

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Decree governing old cars
The RRO shredder is certified in accordance with the decree governing old cars with the result that only old cars stripped of hazardous substances are directed to the recycling process. This eliminates or minimises contamination of the light shredder fraction by waste oil and PCB.

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