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Magnetization of Metal Mesh for Fine Dust Capture

Category: Control Techniques and Strategy

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DOI: 10.4209/aaqr.2017.11.0491
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Sang In Choi1, Jiaping Feng1, Sang Bum Kim2, Young Min Jo 1

  • 1 Department of Applied Environmental Science, Kyung Hee University, Gyeonggi-do 17104, Korea
  • 2 Green process and Material R&D Group, Korea Institute of Industrial Technology, Chungcheongnam-do 31056, Korea


Additional collection of fine dust was performed by magnetization of metal mesh.
Permanent magnets enforce the magnetic force field in mesh wires and interstices.
Magnetized mesh was particularly useful for subway dust with less pressure drop.


Magnetic capture by metal mesh was investigated for fine dust with containing iron compounds. Test filters were prepared by magnetization of stainless woven mesh by permanent magnetic bars. Iron content of the test dust was 8.66%, 25.24% and 12% for fly ash from a coal-fired power plant, effluent dust generated from a metro subway and particulate matters from an urban integrated power plant boiler, respectively. Based on experimental results with a focus on TSP, PM1, PM2.5 and PM2.5-10, the intensity of source magnets related directly to the dust capturing efficiency, and it could obtain 7.41% of additional collection using a source magnet of 3,000 gauss for subway dust. Chemical structure of the dust were more effective for magnetic capture than elemental iron composition. It also was found that the magnetized mesh filters contributed synergistically to improve fine dust capture with low pressure resistance.


Magnetic filter Fine dust Metal mesh Pressure drop Filtration

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