Solid-liquid magnetic separation using bulk superconducting magnets

K. Yokoyama, T. Oka, H. Okada, Y. Fujine, A. Chiba, K. Noto

Research output: Contribution to journalConference articlepeer-review

48 Citations (Scopus)


Our research is to magnetize the high-Tc bulk superconductors and to supply magnetic field environment realized by superconducting bulk magnets to various applications. In this paper, we aim to apply the superconducting bulk magnets to the high gradient magnetic separation (HGMS). Using a face-to-face type superconducting bulk magnet system in which a pair of bulk superconductors are oppositely arranged, Y123 bulk superconductors are magnetized by the "IMRA" method (pulsed field magnetization), and consequently, a magnetic field of 1.6 T is achieved between the magnetic poles. Next, HGMS using superconducting bulk magnets is demonstrated. A separation pipe into which filter matrices composed by ferromagnetic wires are stuffed is set between the magnetic poles and the slurry mixed with fine powder of α-hematite (Fe2O3) particles is flown. As the results of HGMS, over 90% of the Fe2O3 was separated. Moreover, separation filters have to be washed so that they are not clogged with captured particles. We confirmed that the filter was briefly washed by flowing water after moving the separation pipe from magnetic poles.

Original languageEnglish
Pages (from-to)1592-1595
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number2 II
Publication statusPublished - 2003 Jun 1
Externally publishedYes
Event2002 Applied Superconductivity Conference - Houston, TX, United States
Duration: 2002 Aug 42002 Aug 9


  • High-gradient magnetic field
  • Magnetic separation
  • Magnetization
  • Superconducting bulk magnet

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Solid-liquid magnetic separation using bulk superconducting magnets'. Together they form a unique fingerprint.

Cite this