Lindner washTech, Grossbottwar, Germany – part of Austria’s Lindner Group which specialises in the development, manufacture and sales of shredding systems for plastics, waste materials and wood – will be exhibiting its new Rafter system at K 2016. This presents a gentle yet highly efficient solution for the thorough cleaning of highly contaminated, pre-shredded plastic waste by removing extraneous material and prewashing the load in one single step. In conjunction with another Lindner innovation, the Micromat WS wet shredder, this machine marks the rise of a new generation of plastic washing equipment of more compact design and superior economic efficiency.

 

The cleaning process performed in the Rafter comprises three phases. First, a special conveyor screw pulls the contaminated material under the water surface so that heavy contaminations such as metals, stones or glass can precipitate in a smooth initial step. In a second phase, particles adhering to the plastic such as sand, soil or other contaminants are removed by a paddle rotor. The rotor's rotational speed can be adapted to the degree of contamination, thus providing direct control of the cleanliness achieved. Upon completion of the washing cycle, the pre-cleaned waste rises to the surface again from where it is delivered to the downstream process steps by a feed screw. The separated extraneous materials and removed contaminants are discharged by an optional chain-type scraper conveyor. With a nominal throughput of 1500 to 2500kg/h, the Rafter matches the capacity of today's recycling lines. www.lindner-washtech.com 

 

 

As a washing machine for pre-shredded, highly contaminated post-consumer plastic waste, the new Rafter takes its place in the recycling line between the Micromat WS wet shredder and a downstream loop dryer.