Separation method of particles based on electromagnetic coupling

Abstract

This paper investigates an approach for particle matter (PM) separation with electromagnetic field coupling. In consideration of electric and magnetic fields, linear and nonlinear dynamics models of PM separation are established. Simultaneously, this model considers the response of different diameters and velocities of PM to the change of the dynamic model, and the coupling effect of electromagnetic field is used to separate particles. Numerical results present that PM diameter, magnetic field drag, and strength play an important role in the separation of the PM matter. Moreover, with the increase of flux density or the decrease of drag force, the PM separation displacement will grow. Changing the flux density is better than changing the drag force to separate the particles. Following the growth of particle diameter and magnetic flux density, the particle changes from linear motion to spiral motion, and the final particle velocity reaches a stable state after attenuation. In addition, considering the changes of drag force and magnetic field, when drag decrease and magnetic flux density increase, the separation effect gradually becomes better, and the optimal separation distance reaches the decimeter level. However, in most cases, the PM displacement response is small. The work has certified the proposed separation method is feasible by decreasing drag and enhancing magnetic flux density.