Abstract
The microflotation experiments were systematically carried out to investigate the inhibitory effect of citric acid (CA) on the flotation behavior of hornblende and magnesite. When the mixture consisted of sodium oleate and dodecyl phosphate was utilized as a mixed trapping reagent, CA could obviously inhibit the hornblende flotation but had little inhibitory effect on magnesite flotation. The desilication of magnesite flotation was accomplished when CA was employed as the hornblende inhibitor. Moreover, to reveal the adsorption mechanism of CA on the surfaces of hornblende and magnesite, a series of surface analysis techniques, such as X-ray photoelectron spectroscopy (XPS), zeta potential and Fourier transform infrared spectroscopy (FTIR), were conducted. Based on the zeta-potential and FTIR analyses, it is revealed that CA or CA together with collector (sodium oleate and dodecyl phosphate mixture) was applicable for the magnesite flotation tests. In the meanwhile, the introduced CA had obviously hindered the adsorption of sodium oleate and dodecyl phosphate mixtures on the hornblende surface, resulting in a significant difference in the flotation performance of hornblende and magnesite minerals. Moreover, XPS measurements revealed that the strong adsorption of CA on the hornblende surface can be ascribed to its affinity for the negative electron groups of CA and Ca ions.
Funding source: National Natural Science Foundation of China
Award Identifier / Grant number: 51874168
Funding source: Liaoning Revitalization Talents Program
Award Identifier / Grant number: XLYC 2002028
About the authors
Enlei Wang, PhD candidate in Chemical Engineering and Technology, University of Science and Technology Liaoning, Lecturer of mineral processing engineering, University of Science and Technology Liaoning. Mainly engaged in magnesite flotation and process mineralogy research.
Xiaoan Li, Professor and doctoral supervisor in School of Chemical Engineering and Technology, University of Science and Technology Liaoning. Mainly engaged in magnesite mineral processing, process mineralogy research, magnesite flotation preparation and mechanism research.
Shujuan Dai, Professor and doctoral supervisor in School of mining engineering, University of Science and Technology Liaoning, Mainly engaged in beneficiation of magnesite and metal ore, study on the effect of mineral dissolution on beneficiation, preparation and mechanism of magnesite flotation reagent.
Zhao Li, Professor in School of mining engineering, University of Science and Technology Liaoning, Mainly engaged in mechanochemistry research, preparation and mechanism of functional mineral materials.
Tonglin Zhao, Professor in School of mining engineering, University of Science and Technology Liaoning, Mainly engaged in iron ore magnetic separation process and magnetic separation equipment research, mineral flotation theory research.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: This work was supported by the National Natural Science Foundation of China (51874168) and Liaoning Revitalization Talents Program (XLYC 2002028).
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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