Flotation and molecular dynamics simulation of muscovite with mixed anionic/cationic collectors

• Autorzy: Bai Yang , Li Caixia , An Hongyun , Wang Guoliang , Zhao Xin , Zhang Jinqi

Identyfikatory

DOI

10.37190/ppmp20004

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

muscovite; mixed anionic; cationic collectors; flotation; molecular dynamics simulation

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2020
• Tom: Vol. 56, iss. 2
• Strony: 313--324
• Opis fizyczny: Bibliogr. 30 poz., rys., wz.

Twórcy

autor

Bai Yang

• College of Mining, Liaoning Technical University, Fuxin 123000, Liaoning, China

autor

Li Caixia

• College of Mining, Liaoning Technical University, Fuxin 123000, Liaoning, China

autor

An Hongyun

• College of Mining, Liaoning Technical University, Fuxin 123000, Liaoning, China

autor

Wang Guoliang

• College of Mining, Liaoning Technical University, Fuxin 123000, Liaoning, China

autor

Zhao Xin

• College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China

autor

Zhang Jinqi

• School of Finance, Dongbei University of Finance and Economics, Dalian 116000, Liaoning, China

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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.