Abstract
Improvement of selective separation of magnesite from associated carbonate gangue has been challenging. In this study, we report results of molecular dynamics (MD) simulations of the potassium cetyl phosphate (PCP) adsorption on (104) surfaces of magnesite and dolomite. Results of zeta potential and contact angle analyses, and Fourier transform infrared (FTIR) spectroscopy are highlighted to support the flotation behavior and related mechanisms. The results from MD simulations indicate that the PCP molecules are more likely to exclude the pre-adsorbed water molecules at the magnesite/solution interface with the structure deformed more significantly than those at the dolomite/solution interface, suggesting the selectivity for PCP adsorption on magnesite (104) surface. The experimental evidence has also suggested the chemical and preferential adsorption of PCP, which is contributing to the increase of hydrophobicity and electronegativity of magnesite.
Published Version
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