Effects of filter shapes on the capture efficiency of a superconducting high-gradient magnetic separation system

Kim, Y G; Song, Jung-Bin; Yang, Dong; Lee, J S; Park, Y J; Kang, Dahyun; Lee, H G

doi:10.1088/0953-2048/26/8/085002

Cited by 22 publications

(13 citation statements)

References 14 publications

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“…Figure 5 shows axial velocity profiles and particle trajectories depending on magnetized wire thickness: 20 mm to 300 mm, corresponding to Filters 1»5 in Table 1 (rB) was found different from wire thickness (Kim et al 2013). A thick wire certainly provides with less gradient.…”

Section: Effect Of Mesh Filter Configurationmentioning

confidence: 96%

“…Magnetic force has been used to separate and direct ferromagnetic particles in applications in various fields, such as biology, biochemistry, medicine, and environmental science (Schaller et al 2008;Kim et al 2013;Zadravec et al 2014). In wastewater treatment, various superconducting magnets have long been employed to enhance the filtration performance of ferromagnetic filters (Bitton et al 1974;Latour and Kolm 1976;Allen et al 1977).…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Trajectory and Capture of Fine Dust by Magnetic Mesh Filters Based on a Particle Velocity Model

Huang

Park

et al. 2015

Aerosol Science and Technology

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The particle velocity model developed in this study described the dynamic motion of fine dust particles along the magnetized mesh wires in a low Stokes regime. The numerically evaluated velocity contour of the particles modeled the critical path lines indicating the threshold positions for magnetic collection. The velocity contour was determined using the parameters such as particle size, magnetic intensity, flow velocity, and mesh configuration including wire thickness and packing density. Particle size was one of the most significant parameters to determine the magnetic collection. The theoretical estimation matched well with the lab experiments, but the discrepancy increased for large particles with a fine filter. In consequence, application of magnetized mesh filters could contribute to the collection of the ferromagnetic dust or aerosols to a certain extent without any additional power or pressure resistance.

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Section: Effect Of Mesh Filter Configurationmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Dynamic Trajectory and Capture of Fine Dust by Magnetic Mesh Filters Based on a Particle Velocity Model

Huang

Park

et al. 2015

Aerosol Science and Technology

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“…Baik calculated the magnetic field distribution around circular stainless steel matrix via finite element analysis and found that the magnetic force acting on a particle is in average 160 times larger than that only via solenoid magnet [13]. Kim reported the studies on the capture efficiency of a HGMS system employing ferromagnetic matrices with various diameters and packing fractions [14]. The magnetic forces are calculated by computing the magnetic flux density and the gradient with finite element method.…”

Section: Introductionmentioning

confidence: 99%

Effect of Matrix Shape on the Capture of Fine Weakly Magnetic Minerals in High-Gradient Magnetic Separation

Zheng

Wang

2016

IEEE Trans. Magn.

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The magnetic matrix is the core component of the high gradient magnetic separation (HGMS) system and plays a decisive role in the operation of the HGMS system. Cylinder matrix is the most commonly used matrix in HGMS. The matrix shape is a very important parameter influencing the performance of the HGMS system. Special cross-section matrix may have better magnetic characteristics and present better performance in HGMS. However, previous studies of the basic principles of HGMS are basically limited to those employing circular cross-section matrix. Investigations into the magnetic characteristic and performance of special cross-section shape matrix are scarce. In this article, the effect of matrix shape on the capture of fine weakly magnetic minerals in HGMS is investigated with the particle capture model. The matrix shape varies between circular cross-section and elliptic cross-section. The magnetic field and the flow field around the elliptic matrix are analytically calculated. The motion equations of particles around the elliptic matrix under different circumstances are derived and the particle motion trajectories are depicted. The particle capture radius and efficiency of the matrix with shape coefficient L h /L v (ratio of the horizontal axis to vertical axis of the matrix cross-section) ranging from 1/3 to 3 are calculated and compared, providing that the matrix area facing the incoming fluid is the same. The results indicate that there exists the optimal L h /L v value at which the capture radius and efficiency reach the maximum. The optimal L h /L v value increases with the increase of particle size and the decrease of matrix size. Within the L h /L v range of 1/3 to 3, the maximum particle capture efficiency (at the optimal L h /L v or at L h /L v =3) under some arrangements can be much higher than that of the circular matrix (at L h /L v =1), but the increment decreases with the increase of matrix size, the arrangement parameter d/L v and the decrease of particle size. The results provide a theoretical basis for the application of elliptic matrix in HGMS as well as a reference for the development of other novel magnetic matrix in HGMS.

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“…Previously, matrices of different size or shapes, different arrangements were manufactured to do experiments to optimize the HGMS system (Too et al, 1986;Badescu et al, 1996;Ebner et al, 2007;Kim et al, 2013;Padmanabhan and Sreenivas, 2011;Chen et al, 2014). However, as there are so many factors influencing the recovery efficiency, the quantitative analyses of these factors were not done systematically.…”

Section: Introductionmentioning

confidence: 99%

Study on capture radius and efficiency of fine weakly magnetic minerals in high gradient magnetic field

Zheng

Wang

2015

Minerals Engineering

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Effects of filter shapes on the capture efficiency of a superconducting high-gradient magnetic separation system

Cited by 22 publications

References 14 publications

Dynamic Trajectory and Capture of Fine Dust by Magnetic Mesh Filters Based on a Particle Velocity Model

Dynamic Trajectory and Capture of Fine Dust by Magnetic Mesh Filters Based on a Particle Velocity Model

Effect of Matrix Shape on the Capture of Fine Weakly Magnetic Minerals in High-Gradient Magnetic Separation

Study on capture radius and efficiency of fine weakly magnetic minerals in high gradient magnetic field

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