Study on synergistic inhibition and mechanism of flotation separation of fluorite and calcite by tannin and sodium humate

At present, the separation technology of fluorite and calcite is still immature, and the research in this paper can promote the improvement of the separation technology of fluorite and calcite. The selective inhibition mechanism of tannin and humate sodium on calcite was studied by means of actual o...

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Published in:Scientific reports 2024-01, Vol.14 (1), p.381-381, Article 381
Main Authors: Zhu, Zhi-xiong, Nie, Guang-Hua, Tang, Yun, Jiang, Ying, Tuo, Biyang, Li, Jiaxin
Format: Article
Language:English
Subjects:
639/166
639/301
639/638
704/172
Adsorption
Calcite
Flotation
Humanities and Social Sciences
Infrared spectroscopy
multidisciplinary
Organic compounds
Science
Science (multidisciplinary)
Sodium
Tannins
Zeta potential
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Summary:At present, the separation technology of fluorite and calcite is still immature, and the research in this paper can promote the improvement of the separation technology of fluorite and calcite. The selective inhibition mechanism of tannin and humate sodium on calcite was studied by means of actual ore flotation test, single mineral flotation test, Zeta potential measurement and FT-IR spectroscopy. The results show that the mixture of tannin and sodium humate inhibitor has a good inhibitory effect on carbonate under weak alkaline condition. The reaction products of sodium humate, tannin and calcium ions in solution interact with organic compounds adsorbed on the surface of calcite, forming multilayer adsorption on the surface of calcite, making calcite more hydrophilic. Based on density functional theory, Materials Studio (MS) was used to calculate the relevant adsorption energy, and the result was as follows: (a) compared with fluorite, tannin and humate sodium molecules are more easily adsorbed on the surface of calcite. (b) Compared with calcite alone adsorption of tannin molecules or sodium humate molecules, the adsorption state will be more stable, and the effect of tannin and sodium humate synergistic inhibition of calcite is better than the effect of inhibition alone. Therefore, using tannin and sodium humate as a combination inhibitor can effectively separate fluorite and calcite, which will promote the development and utilization of fluorite ore in industry.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-023-50233-x