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High gradient magnetic filtration of fine particles from a gas stream
Author(s) -
Gooding C. H.,
Felder R. M.
Publication year - 1981
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690270204
Subject(s) - filtration (mathematics) , steelmaking , particulates , magnetic separation , magnetic field , filter (signal processing) , particle (ecology) , materials science , air stream , mechanics , analytical chemistry (journal) , chemistry , environmental science , metallurgy , environmental engineering , chromatography , physics , engineering , electrical engineering , statistics , mathematics , organic chemistry , oceanography , quantum mechanics , geology
Dust particles originally generated by two steelmaking processes were dispersed in an air stream and passed through a pilot‐scale high gradient magnetic filter. In accordance with theoretical predictions, the experimental results showed that collection was improved by increasing the depth or density of the steel wool filter, increasing the applied magnetic field, or decreasing the filtration velocity. Collection efficiency increased with particle size up to about 2 μm, above which the efficiency tapered off, apparently due to reentrainment effects. Collection efficiencies of greater than 99% were obtained, indicating that high gradient magnetic filtration may be a practical method of controlling particulate emission from processes in the iron and steel industry.