Journals →  Tsvetnye Metally →  2017 →  #2 →  Back

BENEFICATION
ArticleName Ways of usage of multizone flotation machines. Part 1. Activation of particle adhesion to air bubble to improve the flotation speed and selectivity
DOI 10.17580/tsm.2017.02.03
ArticleAuthor Samygin V. D.
ArticleAuthorData

National University of Science and Technology “MISiS”, Moscow, Russia:

V. D. Samygin, Leading Expert of a Chair of Mineral Processing, e-mail: visamiguin@yandex.ru

Abstract

An important flotation intensifying way is a process, carried out in mineral particle adhesion to air bubble. The pulp flow passing through the ejector of multizone flotation machine (MFM) shows the equal and increased probability of nanobubbles isolation on hydrophobic surface of most particles. Activation is explained by the instantaneous rupture of water film between nanobubbles on the hydrophobic surface of the particles and the bubble, but not by its outflow. The conditions of adhesion activation during the MFM operation may be set depending on the performance (W) of pressure in front of the ejector (P). The conditions of activation formation for transparent two-phase flows (liquid-gas) in a certain area of P and W values were visualized by acquisition of typical “color of milk” to fine bubble flow. At the same time, the surface area in the unit of air volume is by 8.8–14.9 times more than the area, formed in other modes. A universal hydraulic dependence of the pressure P on the unit production capacity W is offered to use for opaque three-phase flows (solid – liquid – gas) as a criterion for the MFM operation mode. Increasing the air consumption and solid content decreased the unit production capacity. Increasing the air consumption also decreased the production capacity in two-phase flow (liquid-gas, L:G), and dependence in the liquid-solid flow (L:S) was extreme. The contributions of the phases were made for production capacity reduction for three-phase flows L:G:S, and the influence of air flow was more then the influence of solid.
This study was supported by the Russian Scientific Foundation, project No. 14-17-00393.

keywords Activation, nanobubbles, hydrophobic surface, pressure, production capacity of two- and three-phase flow
References

1. Lavrinenko A. A. Modern flotation machines for mineral raw materials. Gornaya tekhnika. 2008. pp. 186–195.
2. Maksimov I. I. The XXVIIth International Mineral Processing Congress (Part 1). Obogashchenie Rud. 2015. No. 3. pp. 3–11. DOI: http://dx.doi.org/10.17580/or.2015.03.01
3. Shi S., Zhang M., Fan X., Chen D. Experimental and computational analysis of the impeller angle in a flotation cell by PIV and CFD. International Journal of Mineral Processing. 2015. Vol. 142. pp. 2–9.
4. Yushina T. I., Petrov I. M., Belousova E. B. Flotation machines in Russia: State-of-the-art and prospects. Gornyi Zhurnal. 2016. No. 3. pp. 61–67. DOI: http://dx.doi.org/10.17580/gzh.2016.03.13
5. Markworth L., Jaspers W., Kottmann J. PNEUFLOT — Modern flotation technology in the 21st century. Saam conference, South Africa. 2007.
6. Jameson G. J. New directions in flotation machine design. Minerals Engineering. 2010. Vol. 23, No. 11/13. pp. 835–841.
7. Samyguin V., Filippov L., Matinin A., Lekhatinov Ch., Tertyshnikov M. New multiple-zone flotation cell – device for increasing separation selectivity. Proceedings of the XV Balkan Mineral Processing Congress (BMPC 2013). I. Nishkov. Eds I. Grigorova, D. Mochev. Vol. 2. pp. 1152–1157.
8. O’Hara C., Swedburg K., Roy S., Katchen J. Start-up and early optimization of the new afton concentrator. 47th Annual Mineral Processors Operators Conference, Ottawa. 2015. pp. 73–82.
9. Swedburg K., Bennett C., Samuels M., Wells P. F. Application of the woodgrove staged flotation reactor (SFR) technology at the new afton concentrator. IMPC 2016: XXVIII International Mineral Processing Congress Proceedings.
10. Klassen V. I. Theory of “selective activation” of floatable minerals by air, released from the solution. Tsvetnye Metally. 1946. No. 5. pp. 31–36.
11. Stockelhuber K. W., Radoev B., Wenger A., Schulze H. J. Rupture of wetting films caused by nanobubbles. Langmuir. 2004. No. 20. pp. 164–168.
12. Nizkaya T. V., Dubov A. L., Mourran A., Vinogradova O. I. Probing effective slippage on superhydrophobic stripes by atomic force microscopy. Soft Matter. 2016. Vol. 12. pp. 6910–6917. DOI: 10.1039/C6SM01074A
13. Dai Z., Ralston J., Dai Z., Fornasiero D. Particle-bubble attachment in mineral flotation. Journal Colloid and Interface Science. 1999. Vol. 217, No. 1. pp. 70–76.
14. Englert A. H., Ren S., Masliyah J. H., Xu Z. Interaction forces between a deformable air bubble and a spherical particle of tuneable hydrophobicity and surface charge in aqueous solution. Journal of Colloid Interface Science. 2012. Vol. 379. pp. 121–129.
15. Verrelli D. I., Koh P. T. L., Bruckard W. J., Schwarz M. P. Variations in the induction period for particle-bubble attachment. Minerals Engineering. 2012. Vol. 36/38. DOI: 10.1016/j.mineng.2012.03.034
16. Calgaroto S., Wilberg K. Q., Rubio J. On the nanobubbles interfacial properties and future applications in flotation. Minerals Engineering. 2014. Vol. 60. pp. 33–40.
17. Dubov A. L., Mourran A., Möller M., Vinogradova O. I. Contact angle hysteresis on superhydrophobic stripes. Journal of Chemical Physics. 2014. Vol. 141. pp. 074710.
18. Vinogradova O. I., Belyaev A. V. Wetting, roughness and flow boundary conditions. Journal of Physics: Condensed Matter. 2011. Vol. 23. pp. 1–15.
19. Tyrell J., Attard P. Images of nanobubbles on hydrophobic surfaces and their interactions. Physical Review Letters. 2001. Vol. 87. pp. 76–104.
20. Tretheway D. C., Meinhart C. D. Apparent fluid slip at hydrophobic microchannel walls. Physics of Fluids. 2002. Vol. 14. pp. 1–9.
21. Drelich J., Bowen P. K. Hydrophobic nano-asperities in control of energy barrier during particle-surface interactions. Surface Innovations. 2015. Vol. 3, No. 3. pp. 21164–21171.
22. Guven O., Celik M. S., Drelich J. W. Flotation of methylated roughened glass particles and analysis of particle-bubble energy barrier. Minerals Engineering. 2015. Vol. 79. pp. 125–132.
23. Nizkaya T. V., Asmolov E. S., Zhou J., Vinogradova O. I. Flows and mixing in channels with misaligned superhydrophobic walls. Physical Review E – Statistical, Nonlinear, and Soft Matter Physics. 2015. Vol. 91. pp. 033020.
24. Nizkaya T. V., Dubov A. L., Mourran A.,Vinogradova O. I. Probing effective slippage on superhydrophobic stripes by atomic force microscopy. Soft Matter. 2016. Vol. 12. pp. 6910–6917. DOI: 10.1039/C6SM01074A
25. Pit R., Hervet H., Leger L. Direct experimental evidence of slip in hexadecane: Solid interfaces. Physical Review Letters. 2000. Vol. 85. p. 980.
26. Zhou Z. A., Xu Zhenghe, Finch J. A., Masliyah J. H., Chow R. S. On the role of cavitation in particle collection in flotation — A critical review. II Minerals Engineering. 2009. Vol. 22. pp. 419–433.
27. Honaker R. Q., Saracoglu Christodoulou L., Kohmuench J., Yan E., Mankosa M. In-plant Evaluation of Eriez Cavitation Pre-aeration System. Proceedings of the Coal Prep 2013: 30th Annual International Coal ProcessingExhibition and Conference, Lexington, KY, April 29–May 2, 2013.
28. Tretheway D. C., Meinhart C. D. A generating mechanism for apparent fluid slip in hydrophobic microchannels. Physics of Fluids. 2004. Vol. 16. p. 1509.
29. Fan M., Zhao Y., Tao D. Fundamental studies in nanobubble generation and applications in flotation. SME-Meeting. 2012. pp. 457–469.
30. Abdullaeva S., Nagiev F. Nanohydromechanics. Baku, 2011. 158 p.
31. Samygin V. D. Performance criteria for the use of flotation machines. Tsvetnye Metally. 2016. No. 7. pp. 25–31. DOI: http://dx.doi.org/10.17580/tsm.2016.07.02
32. Samiguin V., Lekhatinov C., Moshchanetskiy P. The effective aerationhydrodynamic operating mode of multi-zone flotation cell. Proceeding of the XVI Balkan mineral processing congress. Serbia, Belgrad, 17–19 juni 2015. Vol. 1. pp. 527–531.
33. Boshenyatov B. V. Hydrodynamics of microbubble gas-liquid mediums. Izvestiya Tomskogo politekhnicheskogo universiteta. 2005. Vol. 308, No. 6. pp. 156–160.
34. Leznov B. S. Frequency-regulated electric drive of pump units. Moscow : Mashinostroenie, 2013. 176 p.

Language of full-text russian
Full content Buy
Back