Particle separation by horizontal deflection in paramagnetic fluid

S. Liu*, M. Leaper, N.J. Miles

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


This paper describes the horizontal deflection behaviour of the streams of particles in paramagnetic fluids under a high-gradient superconducting magnetic field, which is the continued work on the exploration of particle magneto-Archimedes levitation. Based on the previous work on the horizontal deflection of a single particle, a glass box and collector had been designed to observe the movement of particle group in paramagnetic fluids. To get the exact separation efficiency, the method of "sink-float" involved the high density fluid polytungstate (dense medium separation) and MLA (Mineral Liberation Analyser) was performed. It was found that the particles were deflected and settled at certain positions on the container floor due to the combined forces of gravity and magneto-Archimedes forces as well as a lateral buoyancy (displacement) force. Mineral particles with different densities and susceptibilities could be deflected to different positions, thus producing groups of similar types of particles. The work described here, although in its infancy, could form the basis of new approach of separating particles based on a combination of susceptibility and density.

Original languageEnglish
Pages (from-to)26-38
Number of pages13
JournalPowder Technology
Early online date11 Jul 2014
Publication statusPublished - Nov 2014

Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in Powder technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Liu, S, Leaper, M & Miles, NJ, 'Particle separation by horizontal deflection in paramagnetic fluid' Powder technology, vol. 267 (2014) doi

Funding: EPSRC (GR/S83005/01)


  • dense medium separation
  • fine particle processing
  • magnetic separation
  • mineral processing


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