Abstract
ABSTRACT The flotation water pre-treated in a strong magnetic field was studied to improve the floatability of the ilmenite. Zeta potential measurements, adsorption tests, atomic force microscopy (AFM), Fourier transform infrared (FTIR) spectroscopy, and Raman spectroscopy were carried out to reveal the improvement mechanism. After magnetic treatment of the flotation water, the microflotation recovery of ilmenite increased by 5.4% from 74.9% to 80.3%. The adsorption amount of sodium oleate (NaOL) on the ilmenite surface increased and the zeta potential of ilmenite shifted negatively in the presence of NaOL. The analysis of AFM, FTIR, and Raman spectra indicated that magnetic treatment enhanced the hydrogen bonding in the structure of water molecules and a thinner and looser hydration film was formed on the surface of ilmenite, which was contributed to the improvement in the floatability of ilmenite.
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