Magnetic and Electrical Separation
Volume 4 (1993), Issue 2, Pages 75-90
doi:10.1155/1993/95823
A New Type of Corona Electrode for High - Tension Separators
Technical University of Cluj-Napoca, 15 C. Daicoviciu Street, Cluj-Napoca 3400, Romania
Received 25 May 1992
Abstract
The corona discharge represents the main physical mechanism
involved in the charging of granular materials in high-tension
separators. This is why an attempt has been made to formulate
several criteria for choosing the most adequate electrode. A crude
evaluation of the required corona current for an efficient charging
has been considered as a necessary starting point for a wellgrounded
decision on the type of electrode to be employed with a
certain application. The specific features of several models of
corona electrodes are briefly discussed, in order to justify the need
for a new design. The original corona electrode proposed by the
authors is characterized by lower corona on-set voltage, better
stability of the corona discharge during long-time operation, and
shorter maintenance time, as compared to "classical" solutions.
Systematic experiments made on a laboratory model of this
electrode enable several design considerations that could be easily
extended to other similar devices. Two industrial high-tension
separators are already provided with the new type of electrode.