Mechanism Study of Enhanced Hematite Reverse Flotation Desilication by Flocculation of Micro Fine Kaolinite with Polyoxyethylene Oxide

doi:10.12068/j.issn.1005-3026.2023.01.015

Abstract

Abstract: Mineral flotation test， combined with laser particle size test， scanning electron microscope (SEM)， mineral surface potential and XPS (X-ray photoelectron spectroscopy) were used to study the behavior and mechanism of polyoxyethylene oxide (PEO) flocculation of fine kaolinite in the process of hematite reverse flotation. The flotation test showed that the addition of PEO improves the mineral recovery of kaolinite and the separation efficiency of artificial mixed ore， which is conducive to promoting the reverse flotation separation of hematite and kaolinite. The results of laser particle size test and SEM showed that PEO does not flocculate hematite， but flocculates kaolinite particles to increase their apparent particle size. Zeta-potential tests and XPS analysis indicated that chemical adsorption of PEO occurs on the surface of kaolinite particles， and its Zeta-potential is positively shifted. Therefore， PEO has certain guiding significance in the study of reverse flotation separation of hematite and kaolinite.

Key words: polyoxyethylene oxide (PEO); kaolinite; hematite; reverse flotation; flocculation

CLC Number:

TD923

WANG Li-ying， HAO Xiao-yu， YAO Jin， YANG Bin. Mechanism Study of Enhanced Hematite Reverse Flotation Desilication by Flocculation of Micro Fine Kaolinite with Polyoxyethylene Oxide[J]. Journal of Northeastern University(Natural Science), 2023, 44(1): 110-116.

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