BENEFICIATION | |
Название | Analysis of pulsing mode of high voltage supply in corona-type electrostatic separators during the finishing of roughing bulk concentrates |
Автор | Suleymenov O. A. |
Информация об авторе | Chair “Mining”, Taraz State University named after M. Kh. Dulaty, Taraz, Kazakhstan: O. A. Suleymenov, Professor, e-mail: elsepare@mail.ru |
Реферат | Substandard ore processing volume grows every year, which causes the necessity to increase the efficiency and productivity of finishing processes. Electric separation in corona discharge field, which consumes little electric energy, is one of efficient methods of bulk concentrates' finishing. Corona discharge intensity is increased significantly with pulsed voltage. This process was analyzed with various types of highvoltage pulsing. There is offered the mathematical description of process, based on the trellis function. The basic steps of particles' charging were defined. Overcharging of nonconductor and semiconductor particles drains to the precipitation electrode with different speeds. There was studied the effect of residual stress between pulses. According to this, the changes occur in the charging process. Semiconductors change the sign of the charge at sufficient duration of pause. Subsequently, semiconductors may have induction charge. Conductive particles reach their maximum much earlier. Graphic description of the process is offered. Residual stress significantly increases the speed of the particles discharge. Kinetics of electrification of weakly conductive particles is determined by calculation. The limit values of the charges in pulsating corona were obtained. A theoretical justification of ripple voltage parameters is offered. The particles charging process was organized under optimal conditions for efficiency. Experimental results on concentration of minerals mixture with similar electric properties are offered. Pulsed, pulsing and continuous voltages were applied. The researches were conducted in various modes. Electric separation with application of pulsating voltage was more effective. The analysis of pulsing mode of high-voltage power is offered. The possibility of significant increase of concentration efficiency of bulk concentrates is shown. |
Ключевые слова | Electric field, charge, pulse, amplitude, semiconductor, separator, concentrate, intensification, corona discharge, high voltage |
Библиографический список | 1. Angelov A. I., Vereshchagin I. P. et al. Fizicheskie osnovy elektricheskoy separatsii (Physical basis of electric separation). Under the editorship of Correspondent Member of USSR Academy of Sciences V. I. Revnivtsev. Moscow : Nedra, 1983. 271 p. |
Language of full-text | русский |
Полный текст статьи | Получить |