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Wyświetlanie 1-2 z 2
Tytuł:
The effect of NaCl concentration on the interaction energy between feldspar minerale
Autorzy:
Güven, Onur
Can, Muhammed Fatih
Karagüzel, Cengiz
Powiązania:
https://bibliotekanauki.pl/articles/2146939.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
DLVO
albite
microcline
NaCl
Opis:
The impact of the usage of monovalent ion concentration on the selective flotation of feldspar minerals has been receiving more attention in recent years. Although many experimental studies have been reported to justify its contribution to their flotation recovery, the effect of particle-particle interaction with theoretical calculations has rarely been studied. The objective of this study was, therefore, to explain the effect of monovalent ion concentration (in particular NaCl) on interactions between albite and microcline particles with a theoretical model based on the classical DLVO. The theoretical modeling results suggested that controlling the monovalent ion concentration not only adjusts the energy barrier between particles but also can be used to determine the critical salt concentration for further tests.
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 5; art. no. 151031
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
  • odwiedzone
Tytuł:
Revisiting flotation mechanisms of the selective separation of alkali feldspars in the presence of NaCl
Autorzy:
Karagüzel, Cengiz
Çelik, Mehmet Sabri
Powiązania:
https://bibliotekanauki.pl/articles/2146922.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
feldspar
flotation
sodium chloride
selectivity
mechanizm
Opis:
Selective separation of Na-feldspar (NaAl3SiO8) from K-feldspar (KAl3SiO8) by flotation appears to be the only alternative in commonly found mixed-type ore formations. For this purpose, various mechanisms in various studies have been proposed by which selective separation can be achieved in the presence of salt ions. These mechanisms under different flotation conditions are systematically discussed in this study. Literature review reveals that two adsorption mechanisms are operating in the presence of Na+ ions and natural pH: Ion exchange and ion adsorption. In mixed feldspar systems, the mineral surface properties change due to ion exchange of counter ions on K-feldspar surface and become suitable for amine adsorption, while Na-feldspar surface is suppressed due to co-ion adsorption leading to limited amine adsorption. Similar mechanisms occur in acidic conditions with fluorine ions which increases the dispersion of particles and provides selectivity for K-feldspar by forming AlSiF-amine complexes. K-feldspar at alkaline pH with NaOH is activated with fluorine ions at the previous flotation stages and then floated with amine releasing K ions into the solution. The ion exchange/ion adsorption mechanism seems effective in alkaline as well as in natural and acidic conditions.
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 5; art. no. 149928
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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