Chair “Mining”, Taraz State University named after M. Kh. Dulaty, Taraz, Kazakhstan:

O. A. Suleymenov, Professor, e-mail: elsepare@mail.ru

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.

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.
2. Vereshchagin I. P., Levitov V. I., Mirzabekyan G. Z., Pashin M. M. Osnovy elektrogazodinamiki dispersnykh sistem (Basis of electrogasdynamics of dispersion systems). Moscow : Energiya, 1974. 480 p.
3. Mesenyashin A. I. Obogashchenie rud — Mineral processing. 2001. No. 2. pp. 22–26.
4. Krivov S. A. Razrabotka nauchnykh osnov elektricheskoy separatsii po provodimosti : avtoreferat dissertatsii … doktora tekhnicheskikh nauk (Development of scientific basis of electric separation on conductivity : thesis of inauguration of Dissertation … of Doctor of Engineering Sciences). Moscow : Moscow Power Engineering Institute, 2000. 54 p.
5. Dzhuvarly Ch. M., Vechkhayzer G. V., Shteynshrayber V. Ya. Izvestiya Akademii nauk SSSR. Energetika i transport — Reports of USSR Academy of Sciences. Power Engineering and Transport. 1969. No. 1. pp. 158–162.
6. Tsypkin Ya. Z. Teoriya impulsnykh sistem (Theory of pulse systems). Moscow : Fizmatgiz, 1966. 724 p.
7. Suleymenov O. A. Kombinirovannyy sposob vysokovoltnogo pitaniya elektrostaticheskikh separatorov (Combined method of high-voltage supply of electrostatic separators). Materialy VIII mezinarodni vědecko-prakticka conference “Moderni vymoženosti vědy – 2012”. Dil. 28. Technicke vědy. Praha : Publishing House “Education and Science”, 2012. pp. 10–13.
8. Suleymenov O. A. Primenenie pulsiruyushchego napryazheniya v apparatakh elektronno-ionnoy tekhnologii (Application of pulsating stress in electronic-ionic technology apparatuses). Materiały VIII Międzynarodowej naukowi-praktycznej konferencji “Naukowa przestrzeń Europy – 2012”. Vol. 38. Techniczne nauki. Przemyśl : Nauka i studia, 2012. pp. 25–27.
9. Zhebrovskiy S. P. Elektrofiltry (Electrofilters). Moscow : Gosenergoizdat, 1950. 230 p.
10. Maksimov B. K. Elektronnaya tekhnika. Tekhnologiya i organizatsiya proizvodstva — Electronic engineering. Technology and organization of production. 1966. Iss. 3. pp. 17–21.