The depression of molybdenite flotation by sodium metabisulphite in fresh water and seawater

被引：19

作者：

Chen, Yang ^{[1
]}

Chen, Xumeng ^{[1
]}

Peng, Yongjun ^{[1
]}

机构：

[1] Univ Queensland, Sch Chem Engn, Brisbane, Qld 4072, Australia

来源：

MINERALS ENGINEERING | 2021年 / 168卷

基金：

澳大利亚研究理事会;

关键词：

Molybdenite; Flotation; Sodium metabisulfite; Depression; Edge; Face; THIN-FILMS; MOS2; SURFACE; XPS; SULFIDE; PYRITE;

D O I：

10.1016/j.mineng.2021.106939

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Sodium metabisulfite (MBS) has been widely applied to depress pyrite in copper-molybdenum flotation plants in particular when seawater is used as the main water resource. However, whether MBS depresses molybdenite flotation is unknown. In this study, the flotation of molybdenite at 106 and 53 mu m was carried out in the absence and presence of MBS in DI water and seawater to determine the depression role of MBS. Then the products formed on molybdenite faces and edges were detected by cryogenic X-ray photoelectron spectroscopy to understand the reactions involving MBS. This study confirmed the depression of MBS on molybdenite flotation especially for fine particles in DI water. The depression was caused by the adsorption and oxidation of sulphite ions on molybdenite edges, forming sulphate complexes which provided a steric barrier to collector adsorption on molybdenite faces. This study also confirmed little effect of MBS on the flotation of molybdenite at 106 and 53 mu m in seawater. This is because sulphite ions preferentially combined with calcium and magnesium ions in water rather adsorbed on molybdenite edges.

引用

页数：7

共 30 条

[1]

Amelunxen P., 2009, MOLY PLANT DESIGN CO

[2] Effects of Potassium Propyl Xanthate Collector and Sodium Sulfite Depressant on the Floatability of Chalcopyrite in Seawater and KCl Solutions [J].

Arancibia-Bravo, Maria P. ;

Lopez-Valdivieso, Alejandro ;

Flores, Luis F. ;

Cisternas, Luis A. .

MINERALS, 2020, 10 (11) :1-11

[3] Metal island growth and dynamics on molybdenite surfaces [J].

Becker, U ;

Rosso, KM ;

Weaver, R ;

Warren, M ;

Hochella, MF .

GEOCHIMICA ET COSMOCHIMICA ACTA, 2003, 67 (05) :923-934

[4] An XPS study of the surface modification of natural MoS2 following treatment in an RF-oxygen plasma [J].

Brown, NMD ;

Cui, NY ;

McKinley, A .

APPLIED SURFACE SCIENCE, 1998, 134 (1-4) :11-21

[5]

Bulut G, 2012, PHYSICOCHEM PROBL MI, V48, P39

[6] Review of the flotation of molybdenite. Part I: Surface properties and floatability [J].

Castro, S. ;

Lopez-Valdivieso, A. ;

Laskowski, J. S. .

INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 2016, 148 :48-58

[7] Effect of frothers on bubble coalescence and foaming in electrolyte solutions and seawater [J].

Castro, S. ;

Miranda, C. ;

Toledo, P. ;

Laskowski, J. S. .

INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 2013, 124 :8-14

[8]

Castro S., 2012, Water in Mineral Processing: Proceedings of the First International Symposium, SME, P29

[9] The effect of sodium hydrosulfide on molybdenite flotation in seawater and diluted seawater [J].

Chen, Yang ;

Chen, Xumeng ;

Peng, Yongjun .

MINERALS ENGINEERING, 2020, 158

[10] The effect of sodium hydrosulfide on molybdenite flotation as a depressant of copper sulfides [J].

Chen, Yang ;

Chen, Xumeng ;

Peng, Yongjun .

MINERALS ENGINEERING, 2020, 148

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