Particle flocculation and filtration by high-gradient magnetic fields

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Separation Science and Technology

DOI:https://doi.org/10.1080/01496399708003218· OSTI ID:471764

Tsouris, C ^[1]; Yiacoumi, S ^[2]

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1. Oak Ridge National Lab., TN (United States)
2. Georgie Inst. of Technology, Atlanta, GA (United States)

Flocculation and filtration of micrometer-sized particles in a high-gradient magnetic field (HGMF) were investigated. Experiments were conducted using a cryogenic magnet of 6 Tesla maximum strength. Hematite particles were used for flocculation and filtration experiments. A new approach of using magnetic fields to enhance separation of weakly magnetic particles was also investigated. This approach is based on magnetic seeding which involves flocculation of existing non-magnetic particles with injected paramagnetic particles. A particle-flocculation model was developed based on trajectory analysis. External forces due to gravity and magnetism, and interparticle forces such as electrostatic, hydrodynamic, magnetic dipole, and van der Waals forces, were taken into consideration in these models.

• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 471764
• Report Number(s): CONF-951057--
• Journal Information: Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 1-4 Vol. 32; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
40 CHEMISTRY
FILTRATION
FLOCCULATION
HEMATITE
MAGNETIC DIPOLES
MAGNETIC FIELDS
PARTICLES
VAN DER WAALS FORCES