Shredders and crushers for reject processing
During paper manufacture, waste paper and to some extent beverage cartons are reprocessed for the production of paper products. In the first stage of material processing, large quantities of waste paper are dissolved in so-called pulping drums or pulpers using process water and defibrated. The impurities in waste paper, mainly in the form of plastics, are separated from the paper during production. This residual fraction is known as reject and contains approx. 25% (coarse) fibres, 25% plastic and 50% moisture. Given the caloric value of this material, it is an excellent secondary fuel. But in order to use this material as a secondary fuel for your own needs, the material must be shredded and then dehydrated.
Depending on the treatment process and plant size, different quantities of residual fractions are produced. We offer you the appropriate machine technology and size, individually tailored to your wishes and needs. Whether with hydraulic drive with constant speed or with a mechanical drive variant with a variety of speeds, we have customer-specific solutions depending on requirements and material.
- Trouble-free continuous operation due to low-maintenance machines
- Robust cutting gears for shredding even thicker materials
- Perfectly processed material flows
Since most paper mills work 24 hours a day, 365 days a year, the machine must be designed for continuous operation. In order to guarantee you a smooth production process, our machines require very little maintenance, but can be easily serviced as required without great effort and without long delays.
Our machines are specially designed for the processing of wet rejects. With our additional sealing system, the so-called bulkhead wall, we not only protect bearings and gears from water penetration, but also protect the cutting gear from increased wear.
Many plants are installed “ready to move” so that they can be quickly removed from the production cycle in the event of repairs or major maintenance work, without the process having to be interrupted.
The shredded and thus homogeneous material is continuously discharged and separated from the metal as far as possible by means of an overhead magnetic separator. It is then either conveyed directly to the company's own incineration plant or further comminuted in a subsequent processing stage.