An Innovative Magnetic Density Separation Process for Sorting Granular Solid Wastes

Lin Wang*, Peter Rem, Francesco Di Maio*, Max van Beek, Gonçalo Tomás

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Solid waste sorting is an important pre-treatment in recycling to improve the efficiency of material recovery and reduce costs. Motivated by the PEACOC project on metal recovery from solid wastes, an innovative magnetic density separation (MDS) process has been developed for solid waste sorting. It has intrinsic advantages over conventional gravity separation technologies and the previously industrialized MDS process. The new MDS process applies an inclined planar magnet and a horizontal basin containing a static magnetic fluid as the separation medium. A particle sliding phenomenon is identified as a feature that could help the separation. Experiments have been carried out to demonstrate the role of the MDS in concentrating valuable metals in shredded PCBAs and reducing metallic contaminants in plastic fractions of shredded wires. A pilot scale facility is introduced to show the design to achieve continuous production and to reduce the consumption of ferrofluid.
Original languageEnglish
Article number48
Number of pages12
Issue number3
Publication statusPublished - 2024


  • magnetic density separation
  • solid waste sorting
  • magnetic fluid
  • particle sliding phenomenon
  • wasted PCBAs
  • wasted wires


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