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Magnetization of Metal Mesh for Fine Dust Capture

Category: Aerosol Emission Control Technologies and Policies

Volume: 18 | Issue: 7 | Pages: 1932-1943
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

Highlights

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.


Abstract

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

Keywords

Magnetic filter Fine dust Metal mesh Pressure drop Filtration


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