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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

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
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.
Słowa kluczowe
Wydawca

Rocznik
Strony
63--72
Opis fizyczny
Bibliogr. 32 poz., rys., tab.
Twórcy
autor
  • 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
autor
  • Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland, nczawala@cyf-kr.edu.pl
Bibliografia
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  • 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
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  • 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.
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Typ dokumentu
Bibliografia
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