Magnetic entrainment mechanism of multi-type intergrowth particles for Low-Intensity magnetic separation based on a multiphysics model

Wang, Feiwang; Tang, Dongdong; Gao, Likun; Hui-xin, Dai; Wang, Purong; Gong, Zhihui

doi:10.1016/j.mineng.2020.106264

Cited by 12 publications

(3 citation statements)

References 18 publications

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“…According to relevant research 14 , the volume magnetic susceptibility of magnetite particles within a certain magnetic induction range is proportional to the quadratic power of their volume fraction:…”

Section: Characterization Of Particle Properties and Separation Indexmentioning

confidence: 99%

Design and optimization of a novel pneumatic magnetic separator based on multi-physical field coupling simulation

Liu,

2023

Third International Conference on Electronics, Electrical and Information Engineering (ICEEIE 2023)

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A new type of pneumatic magnetic separator is designed in this study. The Dry Magnetic Separation Process (DMSP) is enhanced by introducing a horizontal airflow in the opposite direction to the magnetic force, and the recovery of aim minerals in the intergrowth particles is ensured by setting three recovery zones. The optimal structural parameters are determined by simulating and calculating the magnetic field and flow field characteristics. Based on the tracking calculation of different particle motion states through multi-physical field coupling, the optimal matching scheme of the magnetic field and flow field is determined, and the separation effect is predicted. Hope this design provides a novel and feasible idea for the development of high-efficiency dry magnetic equipment.

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Section: Characterization Of Particle Properties and Separation Indexmentioning

confidence: 99%

Design and optimization of a novel pneumatic magnetic separator based on multi-physical field coupling simulation

Liu,

2023

Third International Conference on Electronics, Electrical and Information Engineering (ICEEIE 2023)

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“…The above results indicate that an appropriate prolongation of the grinding time is beneficial to increasing the grade of TFe in the concentrate, because grinding promotes the dissociation of ferromagnetic minerals and gangue in LVTC; fully liberated and high-grade ferromagnetic mineral particles are first captured by the magnetic force, while non-magnetic minerals such as gangues cannot be captured, and flow into the tailings as a result of the drag force. Minerals in LVTC, on the other hand, were overly dissociated after grinding for more than 30 min, with most particles less than 40 µm in diameter, and because the magnetic force in Equation ( 5) [45] is proportional to the third power of particle diameter, the magnetic force dropped dramatically as the particle diameter decreased. Few ultrafine particles can be captured in the attraction zone when the magnetic force is inadequate to drive fine particles, whereas the majority of ultrafine particles flow into the tailings due to drag and gravity forces.…”

Section: Effect Of Grinding Time On the Grade Of Magnetic Separationmentioning

confidence: 99%

Study on the Grinding Kinetics and Magnetic Separation of Low-Grade Vanadiferous Titanomagnetite Concentrate

Liu

Xing

Cheng

et al. 2022

Metals

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In recent years, a low-grade vanadiferous titanomagnetite concentrate (LVTC) produced in the northwest area of Liaoning has attracted more and more attention. However, it is difficult to recover and utilize valuable minerals such as iron, titanium, and vanadium, due to their special physical and chemical properties and complex mineral composition. Grinding and magnetic separation are two important operational units for recovering valuable metal components from vanadiferous titanomagnetite. Therefore, the grinding kinetics of the LVTC in northwestern Liaoning were first studied by means of grinding kinetics equations in this paper. The results show that the grinding process of LVTC is consistent with the grinding kinetics equation, and the sieve residues of particles approached a constant value after grinding for 30 min, resulting from equilibrium between the fragmentation and agglomeration processes. In addition, equivalent particle size (EPS) and specific surface area (SSA) were linearly proportional to the double logarithm of grinding time, and the correlation coefficients for fitted data by the Rosin–Rammler–Bennet (RRB) model were slightly higher than those by the Swebrec model, and could reflect the dispersibility and uniformity of particle size distribution (PSD) quantitatively. Then, the grinding products were separated by magnetic separation, and the influence of grinding conditions on the grade and recovery ratio of Fe and TiO2 in the LVTC was analyzed. As a result, grinding time has a significant impact on the recovery ratio and grade of Fe and TiO2 during the magnetic separation process, and the LVTC grinding duration is not as prolonged as it might be, as the optimal grinding time is 20 min. Titanomagnetite, ilmenite, and titanite are still the predominant phases in all magnetic separation products at optimal grinding time, but the intensity or content of these three minerals varies between magnetic separation products, and 232 kA/m magnetic field intensity has a higher separation efficiency than 134 kA/m magnetic field intensity.

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“…Its rich physics interface can be freely combined according to specific needs, and all its links (from geometric modeling to solution calculation to results processing) are integrated, which can greatly simplify the operation steps and reduce the operation cost. At present, particle behavior simulation calculations based on the coupling of COMSOL multiphysics have been applied more and more [32][33][34][35]. In this study, we used the "Magnetic field, no current" module, "Laminar flow" module, and "Fluid flow particle tracking" module of COMSOL 5.3a to calculate the magnetic field, the flow field, and the gravity field of ADMS.…”

Section: Introductionmentioning

confidence: 99%

Multiphysics Modeling Simulation and Optimization of Aerodynamic Drum Magnetic Separator

Xue

Dong

et al. 2021

Minerals

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Aerodynamic Drum Magnetic Separator (ADMS) uses an adjustable air flow to enhance the separation of magnetic particles from gangue. In order to explore the matching relationship between the magnetic field, the flow field, and the gravity field, as well as the capture and separation behavior of particles under the action of multi-physics, a related simulation model is established using the finite element software COMSOL Multiphysics and the accuracy of the simulation results is verified by measurement, formula calculation, and magnetic separation experiment. The trajectories and capture probabilities of particles in different magnetic fields and flow fields are calculated, as well as the critical airflow velocity corresponding to a specific capture probability. In addition, the magnetic field characteristics and particle capture effect of N-S alternate arrangement and N-N homopolar arrangement are compared by optimizing the permutation of magnetic poles. This model may provide a reference for the accurate control of magnetic separation enhanced by a coupling force field.

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Magnetic entrainment mechanism of multi-type intergrowth particles for Low-Intensity magnetic separation based on a multiphysics model

Cited by 12 publications

References 18 publications

Design and optimization of a novel pneumatic magnetic separator based on multi-physical field coupling simulation

Design and optimization of a novel pneumatic magnetic separator based on multi-physical field coupling simulation

Study on the Grinding Kinetics and Magnetic Separation of Low-Grade Vanadiferous Titanomagnetite Concentrate

Multiphysics Modeling Simulation and Optimization of Aerodynamic Drum Magnetic Separator

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