Matching relation between matrix aspect ratio and applied magnetic induction for maximum particle capture in transversal high gradient magnetic separation

Wang, Yuhua; Xue, Zixing; Zheng, Xiayu; Lu, Dongfang; Sun, Zixi

doi:10.1016/j.mineng.2020.106316

Cited by 11 publications

(3 citation statements)

References 38 publications

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“…In addition, both the TiO 2 grade and the mass of magnetic products obtained by matrices with an aspect ratio of 2 were the highest. This was consistent with the matching relation between the matrix aspect ratio and the applied induction for maximum particle capture in HGMS in our previously published papers. , …”

Section: Resultssupporting

confidence: 92%

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Significantly Improved Separation Efficiency of Refractory Weakly Magnetic Minerals by Pulsating High-Gradient Magnetic Separation Coupling with Magnetic Fluid

Zheng

Jing

Sun

et al. 2022

ACS Sustainable Chem. Eng.

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High-gradient magnetic separation (HGMS) is indispensably applied in the rougher separation stage of refractory weakly magnetic minerals. The most difficult problem while processing refractory weakly magnetic minerals is the low selectivity of HGMS caused by the competing capture of magnetic valuable and gangue minerals. In this study, a paramagnetic fluid is introduced into HGMS and an innovative method, termed highgradient magnetic separation coupling with magnetic fluid (HGMSCMF), with a significantly high selectivity is proposed. A new competing force (magnetic repulsive force) generated by the magnetic fluid will enlarge the force difference of valuable and gangue minerals and improve selectivity. The relative magnetic force acting on the magnetic valuable and gangue minerals can be adjusted by varying the fluid volume susceptibility, with the optimal fluid susceptibility approaching that of gangue minerals. HGMSCMF experiments on an ilmenite ore using paramagnetic MnCl 2 solutions showed that the selectivity was remarkably improved by increasing MnCl 2 concentrations (fluid susceptibility). The TiO 2 grade and mass of magnetic products could be simultaneously improved by increasing the applied induction in HGMSCMF, whereas in conventional HGMS, the TiO 2 grade and recovery decreased and increased, respectively. HGMSCMF is applicable to various matrices (or separators), and a significantly improved TiO 2 grade (close to that of industrial concentrates) could be obtained with only one-stage HGMSCMF. The recycling of magnetic fluid and cost economy of HGMSCMF are also discussed and analyzed. HGMSCMF presents several advantages over conventional HGMS and has great application prospects for realizing the clean and efficient utilization of refractory weakly magnetic minerals or materials.

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Section: Resultssupporting

confidence: 92%

“…This was consistent with the matching relation between the matrix aspect ratio and the applied induction for maximum particle capture in HGMS in our previously published papers. 55,56 4.4. Effect of Pulsating Frequency.…”

Section: Effect Of Matrix Aspect Ratiomentioning

confidence: 99%

Significantly Improved Separation Efficiency of Refractory Weakly Magnetic Minerals by Pulsating High-Gradient Magnetic Separation Coupling with Magnetic Fluid

Zheng

Jing

Sun

et al. 2022

ACS Sustainable Chem. Eng.

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“…Numerical simulation has been widely used for process study in many fields (Sahbaz et al, 2012;Wang et al, 2020;Sarhan et al, 2017;Zheng et al, 2020). In this study, the computational fluid dynamics (CFD) code CFX 18.0 was employed for calculating the TKE.…”

Section: Cfd Simulationsmentioning

confidence: 99%

Improving separation efficiency of galena flotation using the Aerated Jet Flotation Cell

Li¹,

Wang²,

Lu³

et al. 2020

Physicochem. Probl. Miner. Process.

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The low separation efficiency of traditional mechanical flotation cells for galena flotation primarily was caused by the low collision probability between bubbles and fine particles and high detachment probability of coarse particles. A flotation device named Aerated Jet Flotation Cell (AJFC) was adopted to improve the separation efficiency of galena flotation. Reducing bubble size and optimizing turbulence distribution were respectively confirmed as effective ways to improve fine galena-bubble collision efficiency and decrease detachment probability of coarse galena. In AJFC, micro-bubbles in diameter of 0.1-0.3 mm were generated by forcing compressed air to pass through porous high-density polyethylene tube, and high shear rate and appropriate turbulence were provided by installing a sparger with holes at the end of downcomer. The key parameters, including sparger hole number, turbulent kinetic energy (TKE), air-slurry ratio and superficial gas velocity (Jg) were optimized to achieve a desired separation performance of galena flotation. Separation efficiency of 62.54 % at a residence time of 2.25 min was achieved by AJFC, while separation efficiency of 59.12 % at a residence time of 7.5 min was achieved by mechanical flotation cell. Besides, AJFC had less loss of Pb in tailings than mechanical flotation cell in the whole particle size range, especially for fine (-25 µm) and coarse (+74 µm) size fractions.

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Modeling the multi-stage magnetic filtration in various 3D channels with different configurations of rods

Maghsoudali

Sahami

Jamaati

2022

J Braz. Soc. Mech. Sci. Eng.

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Matching relation between matrix aspect ratio and applied magnetic induction for maximum particle capture in transversal high gradient magnetic separation

Cited by 11 publications

References 38 publications

Significantly Improved Separation Efficiency of Refractory Weakly Magnetic Minerals by Pulsating High-Gradient Magnetic Separation Coupling with Magnetic Fluid

Significantly Improved Separation Efficiency of Refractory Weakly Magnetic Minerals by Pulsating High-Gradient Magnetic Separation Coupling with Magnetic Fluid

Improving separation efficiency of galena flotation using the Aerated Jet Flotation Cell

Modeling the multi-stage magnetic filtration in various 3D channels with different configurations of rods

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