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Open AccessFeature PaperArticle

Surface Properties and Floatability Comparison of Aegirite and Specularite by Density Functional Theory Study and Experiment

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Faculty of Land and Rescource Engineering, Kunming University of Science and Technology, Kunming 650093, China
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School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan 243002, China
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Sinosteel Maanshan Institute of Mining Research Co., Ltd. Ma’anshan 243071, China
*
Authors to whom correspondence should be addressed.
Minerals 2019, 9(12), 782; https://doi.org/10.3390/min9120782
Received: 18 November 2019 / Revised: 8 December 2019 / Accepted: 11 December 2019 / Published: 13 December 2019
(This article belongs to the Section Mineral Processing and Metallurgy)
Understanding the differences in surface properties between aegirite and specularite is of great significance to study their separation. In this work, the surface properties of aegirite and specularite, as well as their relationships to floatability, have been explored by first principle calculation, flotation, and Zeta potential measurement. The surface relaxation indicated that the specularite (001) surface appeared to show more surface reconstruction. The unsatisfied bond properties, Mulliken bond population, and surface charge showed that the floatability of specularite was superior to that of aegirite. The flotation results showed that the hydrophobicity of specularite was higher than that of aegirite with dodecylamine (DDA) as the collector. It is infeasible to separate specularite from aegirite by flotation using starch as the depressant, and research of effective reagents with high affinity to the element Si is the subclinical breakthrough point of specularite/aegirite separation. View Full-Text
Keywords: aegirite; specularite; iron-containing silicate; surface properties; floatability; density functional theory aegirite; specularite; iron-containing silicate; surface properties; floatability; density functional theory
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MDPI and ACS Style

Li, M.; Liu, J.; Gao, X.; Hu, Y.; Tong, X.; Zhao, F.; Yuan, Q. Surface Properties and Floatability Comparison of Aegirite and Specularite by Density Functional Theory Study and Experiment. Minerals 2019, 9, 782.

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