Flotation separation of scheelite from calcite using sodium polyacrylate as depressant

• Autorzy: Zhang Y. , Chen R. , Li Y. , Wang Y. , Luo X.

Identyfikatory

DOI

10.5277/ppmp1844

• Języki publikacji: EN

Abstrakty

EN

The depressing properties of sodium polyacrylate (PA-Na) for calcite from scheelite were studied by microflotation experiments, zeta potentials, X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculation. Flotation results revealed that the selective depression effect of PA-Na was better than that of sodium silicate (Na2SiO3), and PA-Na can depress calcite more effectively than scheelite. The flotation recovery of scheelite and calcite kept at about 75% and 15% respectively at the pulp pH 9.3~9.6 and PA-Na concentration from 37.5 mg/dm3 to 50 mg/dm3. The zeta potentials of the minerals were significantly altered and the zeta potential of calcite became more negative than scheelite. XPS analysis deduced the occurrence of chemisorption between PA-Na and mineral surfaces, and the chemisorption of PA-Na on calcite was stronger than on scheelite. The results from DFT calculation demonstrated that the absolute value of the adsorption energy in the presence of PA-Na on the surface of calcite {104} was larger than on the surface of scheelite {111}. With the combination of the analysis, it could be concluded that calcite was more easily depressed than scheelite, and this finding remarkably matched with the microflotation experimental results. Furthermore, by using PA-Na as depressant, the flotation separation of scheelite from calcite can be achieved by controlling the flotation pH and PA-Na dosage.

Słowa kluczowe

EN

scheelite; calcite; flotation; sodium polyacrylate; selective depression

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2018
• Tom: Vol. 54, iss. 2
• Strony: 505--516
• Opis fizyczny: Bibliogr. 34 poz., rys., tab.

Twórcy

autor

Zhang Y.

• State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming 650093, China
• Mineral Processing Engineering, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China
• [e-mail]

autor

Chen R.

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

autor

Li Y.

• State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming 650093, China

autor

Wang Y.

• Mineral Processing Engineering, School of Minerals Processing and Bio-engineering, Central South University, Changsha 410083, China
• [e-mail]

autor

Luo X.

• Mineral Processing Engineering, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China
• Mineral Processing Engineering, School of Minerals Processing and Bio-engineering, Central South University, Changsha 410083, China

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Uwagi

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