Table of Contents
Magnetic and Electrical Separation
Volume 11, Issue 4, Pages 225-238
http://dx.doi.org/10.1080/10556910290009030

Kinetics of Particle Charging in an Electrostatic Field of Separators

Mekhanobr-Tekhnika Co, 3, 28 Liniya, St. Petersburg, 199106, Russia

Received 6 December 2001; Accepted 1 January 2002

Copyright © 2002 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

With reference to electrostatic separation, expressions are considered for computation of kinetics of particle charging in electrostatic field and corona discharge field. Particles are represented as three-axis ellipsoids, which permits to approximate the particles of various shapes. Volume conductance and dielectric permittivity, of both particles and ambient medium are taken into consideration. Total charges and free charges of particles with high and low conductance are considered. General expression permitting to define particle charge in a time-varying electric field has been derived. An example of computation is considered, when external field varies sinusoidally, and dependence of the particle charges on the external field duration and variation rate is shown.