Modular sorting plant

The generation of concentrated fractions is an important step in the process chain of treating primary and secondary raw materials. In addition to the established classification and sorting processes based on physical principles there is an increasing demand for intelligent solutions to meet the growing complexity and heterogeneity of material flows.

© Sesotec

CAD model of the modular sorting plant

The Fraunhofer Project Group IWKS will operate a highly flexible sorting plant by the end of 2017. It will be suited for fundamental studies of the sortability of material flows as well as the processing of large quantities.


The modular concept comprises the following units in detail:

Multi-deck screening machine (flip-flow screen), Spaleck:

  • Working width 975 mm
  • Screening of difficult, sticky or wet materials with screen cuts from 0,2 mm up to
    approx. 50 mm
  • “Trampoline effect” creates accelerations of up to 50 g in the screening mats
  • Very good loosening up of the product, no clogging


Magnetic drum and eddy current separator, Eriez:

  • Working width 1000 mm
  • Particle size 1-50 mm (optimum ratio 1:3)
  • Adjustment of process parameters through variation of rotation and belt speeds and positions of pass partition plates and pole wheels

Multi-sensor system, Sesotec:

  • Working width 1024 mm
  • Particle size 1-50 mm
  • Combination of:
    - 2 CCD line cameras (color and shape of objects)
    - Induction sensor (detection of metals)
    - Hyperspectral camera (NIR 1330-1900 nm, identification of organic materials)
  • Compressed air ejector:
    - 6,4 mm grid: 160 nozzles with 2,5 mm diameter
    - 3,2 mm grid: 320 nozzles with 2 mm diameter