Molecular dynamics study of the effect of temperature on the flotation behavior of sodium oleate on the surface of diaspore. (February 2023)

• Record Type: Journal Article
• Authors: Wang, Chenliang; Man, Xiaofei; Ou, Leming
• Is Part Of: Minerals engineering. Volume 192(2023)
• Publication Date: 2023-02
• Subjects: Temperature -- Molecular dynamics -- Diaspore -- Sodium oleate -- Flotation behavior; Mines and mineral resources -- Periodicals; Ressources minérales -- Périodiques; Mines and mineral resources; Periodicals; Electronic journals; 622
• DOI: 10.1016/j.mineng.2023.108004
• Languages: English
• ISSNs: 0892-6875

Abstract

Abstract: The effect of temperature on the flotation behavior of sodium oleate on the surface of diaspore was investigated by using molecular dynamics (MD) simulations at three selected temperatures of 278.15 K, 303.15 K and 328.15 K. Conformational analysis, RDF analysis, hydrogen bonds statistics, SASA calculations and interaction energy analysis revealed that a certain range of temperature increase was beneficial for flotation, and the right temperature could yield better reagent dispersion and better mineral-reagent interactions. It was also noted that the enhanced molecular motion due to increased temperature may negatively affect the adsorption of the reagent on the mineral surface. The present study has theoretical implications for the effect of temperature on the flotation behavior of ionic surfactants on mineral surfaces. Highlights: The effect of temperature on flotation was studied by molecular dynamics. Different temperatures showed different performances of sodium oleate in collecting diaspore. A suitable temperature could make the sodium oleate better dispersed and distributed. Higher temperature did not necessarily lead to a better flotation environment.