Effective separation of specularite and aegirite using chitosan as a novel depressant
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Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China
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School of Metallurgy Engineering, Anhui University of Technology, Ma'anshan 243032, China.
CORRESPONDING AUTHOR
Mingyang Li   

Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China
Publication date: 2022-06-29
 
 
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ABSTRACT
As one of representative iron-bearing silicates gangue minerals, aegirite often associates with specularite. Due to the iron element contained in aegirite, it has similar surface properties to specularite. Flotation is by far one of the most efficient methods of processing this kind of iron ore. But the traditional depressants are incapable of action in the separation of specularite and aegirite. Chitosan was used as a novel depressant to attempt to separate specularite from aegirite through microflotation tests, Zeta potential measurements, adsorption tests, contact angle measurements, and XPS analysis. The flotation results indicate that chitosan show more strong depression effect on specularite than aegirite. Zeta potential measurements, contact angle measurements and adsorption tests demonstrate that chitosan is more inclined to adsorb on the specularite surface than aegirite, which hinders the subsequent adsorption of collector sodium oleate and increases difference in hydrophobicity between the two minerals. The XPS results of specularite validate the adsorption of chitosan on specularite, and illustrate that electrons partially transferred from chitosan to the oxygen and iron atoms in specularite during the adsorption process.
eISSN:2084-4735
ISSN:1643-1049