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2018 | Vol. 54, iss. 1 | 63--72
Tytuł artykułu

Surface roughness in bubble attachment and flotation of highly hydrophobic solids in presence of frother – experiment and simulations

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In this paper, the kinetic of the three-phase contact (TPC) formation and the flotation recovery of highly hydrophobic solids with different surface roughness were studied in pure water and aqueous solutions of n-octanol. The surface roughness varied between 1 to 100 μm. It was found that there was a strong influence of surface roughness on both kinetics of TPC formation and flotation. The time of three phase contact formation and flotation rate were much faster for rough surfaces in both water and aqueous solutions of frother. Irrespective of the surface roughness, at above a certain frother dose, the attachment time increased and the flotation rate decreased. It was related to the presence of air at the hydrophobic solid surfaces. The mechanism of this prolongation of the time of TPC formation at the solid surfaces with different roughness due to the frother overdosage was discussed, and the experimental data were confirmed by numerical simulations.
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Bibliogr. 32 poz., rys., tab.
  • Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland
  • Wroclaw University of Science and Technology, Faculty of Geoengineering, Mining and Geology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
  • NTNU Norwegian University of Science and Technology, Department of Geoscience and Petroleum, NO-7491 Trondheim, Norway
  • Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland,
  • ANFRUNS, J.F., KITCHENER, J.A., 1977, Rate of capture of small particles in flotation, IMM Trans. Sect. C Miner. Process. Extra. Metall., 86, 9–15.
  • CALGAROTO, S., WILBERG, K.Q., RUBIO, J., 2014, On the nanobubbles interfacial properties and future applications in flotation, Min. Eng. 60, 33-40.
  • DRZYMALA, J. 2007. Mineral Processing. Foundations of theory and practice of minerallurgy, 1st English Edition. Oficyna Wydawnicza Politechniki Wroclawskiej, Wroclaw.
  • EXEROWA, D., KRUGLYAKOV, P.M., 1998, Foam and Foam Films – Theory, Experiments, Application, Elsevier, Amsterdam.
  • FAN, M., TAO, D., HONAKER, R., LUO, Z., 2010, Nanobubble generation and its application in froth flotation (part I): nanobubble generation and its effects on properties of microbubble and millimeter scale bubble solutions, Min. Sci. Technol. 20, 1-19.
  • FUSTER, D., AGBAGLAH, G., JOSSERNAD, C., POPINET, S., ZALESKI, S., 2009, Numerical simulation of droplets, bubbles and waves: state of the art, Fluid Dyn. Res. 41, 065001.
  • KOSIOR, D., ZAWALA, J., KRASOWSKA, M., MALYSA, K., 2013, Influence of n-octanol and a-terpineol on thin film stability and bubble attachment to hydrophobic surface, Phys. Chem. Chem. Phys., 15, 2586-2595 .
  • KOSIOR, D., ZAWALA, J., MALYSA, K., 2011, When and how α-terpineol and n-octanol can inhibit the bubble attachment to hydrophobic surfaces, Physicochem. Probl. Miner. Process. 47, 169-182
  • KOWALCZUK P.B., 2013, Determination of critical coalescence concentration and bubble size for surfactants used as flotation frothers. Ind. Eng. Chem. Res., 52(33), 11752–11757.
  • KOWALCZUK, P.B., ZAWALA, J., 2016, A relationship between time of three-phase contact formation and flotation kinetics of naturally hydrophobic solids, Colloids Surf. A: 506 (2016) 371–377.
  • KOWALCZUK, P.B., ZAWALA, J., KOSIOR, D., DRZYMALA, J., MALYSA, K., 2016, Three-phase contact formation and flotation of highly hydrophobic polytetrafluoroethylene in the presence of increased dose of frothers, Ind. Eng. Chem. Res. 55, 839−843.
  • KRASOWSKA, M., KRASTEV, R., ROGALSKI, M., MALYSA, K., 2007, Air-facilitated three-phase contact formation at hydrophobic solid surfaces under dynamic conditions, Langmuir, 23, 549-557.
  • KRASOWSKA, M., MALYSA, K., 2007, Kinetics of bubble collision and attachment to hydrophobic solids: I. Effect of surface roughness. Int. J. Miner. Process, 81, 205–216.
  • KRASOWSKA, M., ZAWALA, J., MALYSA, K., 2009, Air at hydrophobic surfaces and kinetics of three phase contact formation, Adv. Colloid Interface Sci., 147–148 (2009) 155–169.
  • KRZAN, M., ZAWALA, J., MALYSA, K., 2007, Development of steady state adsorption distribution over interface of a bubble rising in solutions of n-alkanols (C5, C8) and n-alkyltrimethylammonium bromides (C8, C12, C16), Colloids Surf. A:, 298, 42–51.
  • LASKOWSKI, J., KITCHENER, J.A, 1969, The hydrophilic–hydrophobic transition on silica. J. Colloid Interface Sci., 29, 670–679.
  • MARMUR, A., 2008, From hygrophilic to superhygrophobic: theoretical conditions for making high-contact-angle surfaces from low-contact-angle materials. Langmuir 24, 7573–7579.
  • NGUYEN, A.V., SCHULZE, H.J., 2004, Colloidal Science of Flotation, Marcel Dekker, New York.
  • POPINET, S., 2003, Gerris: a tree-based adaptive solver for the incompressible Euler equations in complex geometries, J. Comput. Phys. 190, 572–600.
  • POPINET, S., 2009, An accurate adaptive solver for surface-tension-driven interfacial flows, J. Comput. Phys. 228, 5838–5866.
  • RALSTON, J., 1983, Thin films and froth flotation, Adv. Colloid Interface Sci. 19, 1-26.
  • SCHELUDKO, A., 1967, Thin liquid films, Adv. Colloid Interface Sci. 1, 391–464.
  • SEDEV, R., FABRETTO, M., RALSTON, J., 2004, Wettability and surface energetics of rough fluoropolymer surfaces. J Adhes. 80, 497–520.
  • SNOSWELL, D. R. E., DUAN, J., FORNASIERO, D., RALSTON, J., 2003, Colloid stability and the influence of dissolved gas, J. Phys. Chem. B, 107, 2986–2994.
  • STOCKELHUBER, K.W., 2003, Stability and rupture of aqueous wetting films. Eur. Phys. J. E. 12, 431–435.
  • STOCKELHUBER, K.W., RADOEV, B.P., WENGER, A., SCHULZE, H.J., 2004, Rupture of wetting films caused by nanobubbles, Langmuir, 20, 164–168.
  • WILLS, B.A., FINCH, J.A., 2016. Wills' Mineral Processing Technology, 8th Ed., An introduction to the practical aspects of ore treatment and mineral recovery. Elsevier Ltd, Amsterdam.
  • ZAWALA, J., KOSIOR, D., DABROS, T., MALYSA, K., 2016, Influence of bubble surface fluidity on collision kinetics and attachment to hydrophobic solids, Colloids Surf. A:, 505, 47–55.
  • ZAWALA, J., SWIECH, K., MALYSA, K., 2007, A simple physicochemical method for detection of organic contaminations in water, Colloids Surf. A: 302 (2007) 293–300.
  • ZAWALA, J., KARAGUZEL, C., WIERTEL, A., SAHBAZ, O., MALYSA, K., 2017, Kinetics of the bubble attachment and quartz flotation in mixed solutions of cationic and non-ionic surface-active substances, Colloids Surf. A: 523 (2017) 118-126.
  • ZHANG, W., NESSET, J. E., RAO, R., FINCH, J. A., 2012, Characterizing frothers through critical coalescence concentration (CCC)95-hydrophile-lipophile balance (HLB) relationship. Minerals 2, 208−227.
  • ZHOU, Z.A., XU, Z.H., FINCH, J.A., MASLIYAH, J.H., CHOW, R.S., 2009, On the role of cavitation in particle collection in flotation – A critical review. II, Minerals Eng., 22(5), 419-433.
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