Interaction between sphalerite and pyrite and its effect on surface oxidation of sphalerite

• Autorzy: Yang B. , Xie X. , Tong X. , Lan Z. , Cui Y.

Identyfikatory

DOI

10.5277/ppmp1816

• Języki publikacji: EN

Abstrakty

EN

The interaction between sphalerite and pyrite was investigated by dissolution test, X-ray photoelectron spectroscopy (XPS), zeta potential measurement and density functional theory (DFT) calculation. Dissolution tests indicated that sphalerite dissolution was promoted due to the galvanic interaction between sphalerite and pyrite. The Zn2+ ion concentration increased with increasing pyrite content and dissolved time. XPS analysis results demonstrated that a new oxidation product was formed on the sphalerite surface in the presence of pyrite in a pulp. Zeta potential measurements showed that the isoelectric point of sphalerite increased from 3.3 to 5.4 due to galvanic interaction. DFT calculation results suggested that electron transfer from sphalerite to pyrite occurred when they contacted. The Zn 4s and S 3p states of sphalerite lost electrons. The Fe 4p and 4s of pyrite states obtained electrons, and Fe 3d and S 3s states lost a small number of electrons. The surface oxidation of sphalerite was promoted due to the interaction with pyrite, and the collectorless floatability of sphalerite decreased.

Słowa kluczowe

EN

sphalerite; surface oxidation; minerals interaction; DFT

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2018
• Tom: Vol. 54, iss. 2
• Strony: 311--320
• Opis fizyczny: Bibliogr. 38 poz., rys., tab.

Twórcy

autor

Yang B.

• Kunming University of Science and Technology, Faculty of Land Resource Engineering, Kunming 650093, China

autor

Xie X.

• Kunming University of Science and Technology, Faculty of Land Resource Engineering, Kunming 650093, China

autor

Tong X.

• Kunming University of Science and Technology, Faculty of Land Resource Engineering, Kunming 650093, China

autor

Lan Z.

• Kunming University of Science and Technology, Faculty of Land Resource Engineering, Kunming 650093, China

autor

Cui Y.

• Kunming University of Science and Technology, Faculty of Land Resource Engineering, Kunming 650093, China

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).