DEXRT Imaging for Automatic Particle Sorting

摘要

The concept of imaging based on dual-energy X-ray transmission (DE-XRT) for automatic article sorting was developed by Delft University of Technology since 2000. Applications in the sorting of metal alloys, recycle glass and electrical and electronic wastes are today available for industrial application. This technique can also be applied for the concentration of certain types of polymers as well as for the removal of halogen and heavy-metal containing components from organic mixtures prior to thermal treatment. Examples are the removal and concentration of PVC and flame retardant resins from plastic mixtures and the removal of critical contaminants from solid recovered fuel (SRF). Today state-of-the-art automatic X-Ray sorters are equipped with DE-XRT technology and are capable of processing large volumes of material. These features make X-ray sorting an economically attractive option for waste processing. Experimental data on the separation efficiency of metals and chlorine or bromine containing polymer from mixed shredder residue are presented and discussed.