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In this study, three kinds of anionic collectors (sodium oleate (NaOl), sodium dodecyl sulfonate (SDS) and naphthenic acid (NA)) were used in combination with dodecylamine (DDA) to investigate the flotation behavior of muscovite under the action of different mixed anionic/cationic collectors, and their mechanisms for adsorption on the muscovite (001) Surface were clarified using molecular dynamics simulations. The flotation results indicated that different mixed anionic/cationic collectors could improve the recovery of muscovite to varying degrees, but the optimum molar ratio of anionic collectors to DDA and the optimum mixed collector dosage were different. Molecular dynamics simulations showed that the mixed anionic/cationic collectors could significantly increase the hydrophobicity of the muscovite, as evidenced by the decrease in the calculated water molecule density on the muscovite surface and the diffusion coefficient of water molecules at the solid/liquid interface. The interaction between the amino group and the polar group of anionic collectors reduced the electrostatic repulsion between DDA cations and theoretically increased the adsorption capacity of the mixed anionic/cationic collectors on the muscovite surface. Moreover, DDA/NA and DDA/NaOl could improve the calculated carbon atom density on the muscovite surface, which enhanced the hydrophobic association between nonpolar carbon chains, thus further achieving an enhanced flotation performance.
Rocznik
Tom
Strony
313--324
Opis fizyczny
Bibliogr. 30 poz., rys., wz.
Twórcy
autor
- College of Mining, Liaoning Technical University, Fuxin 123000, Liaoning, China
autor
- College of Mining, Liaoning Technical University, Fuxin 123000, Liaoning, China
autor
- College of Mining, Liaoning Technical University, Fuxin 123000, Liaoning, China
autor
- College of Mining, Liaoning Technical University, Fuxin 123000, Liaoning, China
autor
- College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China
autor
- School of Finance, Dongbei University of Finance and Economics, Dalian 116000, Liaoning, China
Bibliografia
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Uwagi
This research was funded by the Projects of Science and Technology Department of Liaoning Province, grant number LJ2019ZL004, and the Open Projects of Research Center of Coal Resources Safe Mining and Clean Utilization, Liaoning, grant number LNTU17KF17.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-ff7cd31c-6412-459c-9233-8fa28bf3dd8e