| ArticleName |
New applications of the triboelectrification effect in electrostatic separation |
| Abstract |
The possibility of using triboelectrification in electrostatic separation is of great interest for the separation of finely ground mineral and technogenic raw materials. The ability of polydisperse material particles of different sizes to acquire a different charge under the action of tribocharging opens up the possibility of using triboelectrostatic separation in grain-size classification. Various options for the application of triboelectrification in electrostatic separators are considered. Analysis of the design features for each separator type enabled the creation at «Mekhanobr-Tekhnika» REC of a new electrostatic separator, in which particles are precharged using a highvoltage current source and subsequently separated under the action of a low-gradient electric field created by tribocharging a dielectric drum electrode through friction against a brush. Comparative experimental tests on the separation of materials using the ELKOR-1 corona-electrostatic separator and the pilot separator were carried out. The materials tested included electronic scrap, from which polymetallic concentrate was recovered, and crushed automobile tires (rubber crumb), from which textile cord was removed. As a result of the experiments, it was established that the use of the triboelectrification effect as of an energy source in electrostatic separation has great prospects.
The work was performed with the financial aid of the Ministry of Education and Science of the Russian Federation under Grant Agreement No. 14.585.21.0007, RFMEFI 58516X0007. |
| References |
1. Mesenyashin A. I., Logacheva N. A. Electrostatic separation of mineral raw materials. Gorny Informatsionno-analiticheskiy Byulleten. 2005. No. 12. pp. 283–286.
2. Mirkowska M., Kratzer M., Teichert C., Flachberger H. Principal factors of contact of minerals for successful triboelectric separation process. Berg- und Huttenmannische Monatshefte. 2016. Vol. 161, Iss. 8. pp. 359–382.
3. Mach F., Adam L., Kacerovský J., Karban P., Doležel I. Evolutionary algorithm-based multi-criteria optimization of triboelectrostatic separator. Journal of Computational and Applied Mathematics. 2014. Vol. 270. pp. 134–142.
4. Inculet I. I., Castle G. S., Aartsen G. Generation of bipolar electric fields during industrial handling of powders. Chemical Engineering Science. 2006. Vol. 61. pp. 2249–2253.
5. Miloudi M., Medles K., Tilmatine A., Bendaoud A., Dascalescu L. Optimization of belt-type electrostatic separation of triboaerodynamically charged granular plastic mixtures. IEEE Transactions on Industry Applications. 2013. Vol. 49, No. 4. pp. 1781–1786.
6. Chen J., Honaker R. Dry separation on coal-silica mixture using rotary triboelectrostatic separator. Fuel Processing Technology. 2015. Vol. 131. pp. 317–324.
7. Hrach F. J., Brittner J. D., Flynn K. P. Expanding applications in dry triboelectric separation of minerals. Proceedings of the XXVII International Mineral Processing Congress. 2014. Chap. 11. pp. 1–13.
8. Dmitriev S. V., Stepanyan А. S. Microelectronics scrap salvaging technology and equipment — modern trends. Obogashchenie Rud. 2017. No. 2. pp. 49–53. DOI: 10.17580/or.2017.02.09
9. Wang Z. L., Lin L., Chen J., Zi Yu. Triboelectric nanogenerators. Springer, 2016. 489 p. DOI: 10/1007/978-3-319-40039-6
10. Khushboo, Azad P. Triboelectric nanogenerator based on vertical contact separation mode for energy harvesting. Proceedings of the International Conference on Computing, Communication and Automation (ICCCA). 2017. pp. 1499–1502. DOI: 10.1109/CCAA.2017.8230037
11. Zeghloul T., Neagoe M. B., Prawatya Yo., Dascalescu L. Triboelectrical charge generated by frictional sliding contact between polymeric materials. 13th International Conference on Tribology, ROTRIB'16. 22–24 September 2016, Galati, Romania. NY: Curran Associates, Inc., 2017. Vol. 174. pp. 9–14. DOI: 10.1088/1757-899X/174/1/012002/
12. Dizdar T.O., Kocausta G., Gülcan E., Gülsoy Ö. Y. A new method to produce high voltage static electric load for electrostatic separation — Triboelectric charging. Powder Technology. 2018. Vol. 327. pp. 89–95.
13. Pat. U. S. 2225096. Electrostatic separator. H. L. Bullock. 1940.
14. Dmitriev S. V., Grigoryev I. V. Prospects for the use of dielectric barrier discharge in electrostatic separation. Obogashchenie Rud. 2018. No. 4. pp. 34–37. DOI: 10.17580/or.2018.04.07
15. Vaisberg L. А., Demidov I. V., Ivanov K. S. Mechanics of granular media under vibration action: the methods of description and mathematical modeling. Obogashchenie Rud. 2015. No. 4. pp. 21–31. DOI: 10.17580/or.2015.04.05
16. Vaisberg L. A., Zarogatskiy L. P. New generation of jaw and cone crushers. Stroitelnye i Dorozhnye Mashiny. 2000. No. 7. pp. 16–21. |
