Multiphysics Modeling Simulation and Optimization of Aerodynamic Drum Magnetic Separator

Abstract

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.

On the need to classify rock mass fed to dry magnetic separation

“…Pre-concentration improves the quality of ore mass in lumps and forms, depending on the composition of its waste, raw materials for secondary use -"environmentally friendly" technogenic deposits or building material [9][10][11]. Thus, in beneficiation of ferruginous quartzites, pre-concentration by dry magnetic separation (DMS) is applied [12][13][14], its efficiency depending not only on the realization modes of the DMS process, but also on the size modulus of lumpy material in the separated class [15][16][17]. Papers [18][19][20] present the results of theoretical and experimental research, outline the conditions determining the need to prepare the ore mass for separation using screening.…”