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The Efficient Separation of Apatite from Dolomite Using Fucoidan as an Eco-Friendly Depressant

Authors :
Yifan Zhang
Bingqiao Yang
Bing Deng
Huihua Luo
Fang Zhou
Source :
Minerals, Vol 14, Iss 9, p 922 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

The aim is to explore new depressants for achieving the efficient separation of apatite and dolomite. In this work, fucoidan (FD) was examined as an eco-friendly dolomite depressant to separate dolomite from apatite. The depression ability and adsorption mechanisms were investigated. The flotation results indicated that FD selectively depressed dolomite. The flotation difference between dolomite and apatite reached 70% approximately at an FD concentration of 75 mg/L. Meanwhile, the recovery and grade of P2O5 reached 89.84% and 32.88% and that of MgO decreased to 1.64% and 34.24% in the artificially mixed minerals test. Wettability, zeta potential, and Fourier transform infrared spectroscopy (FTIR) results revealed that FD tended to adsorb onto dolomite, impeding the interaction of sodium oleate (NaOL) with dolomite, but barely affected that on apatite. Microcalorimetry analysis indicated that the adsorption heat of FD on dolomite was much higher and less time was required to achieve equilibrium. X-ray photoelectron spectroscopy (XPS) results proved that the sulfonic acid radicals within FD chemically interacted with Mg atoms on dolomite while it weakly adsorbed on apatite.

Details

Language :
English
ISSN :
2075163X
Volume :
14
Issue :
9
Database :
Directory of Open Access Journals
Journal :
Minerals
Publication Type :
Academic Journal
Accession number :
edsdoj.081071b88a4b4d1fb75ce0481f65d012
Document Type :
article
Full Text :
https://doi.org/10.3390/min14090922