The Auxiliary Effect of Copper Ions on the Depressant Effect of Sodium Thioglycolate in Chalcopyrite Flotation
| Autor: | Xiaozhen Tian, Xianzhong Bu, Chonghui Zhang, Chen Wei, Wang Sen, He Tingshu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
lcsh:QE351-399.2
medicine.drug_class 0211 other engineering and technologies flotation chemistry.chemical_element 02 engineering and technology Ion chemistry.chemical_compound Adsorption X-ray photoelectron spectroscopy depressant Zeta potential medicine 021102 mining & metallurgy sodium thioglycolate lcsh:Mineralogy Chalcopyrite Chemistry Geology copper ions 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Copper chalcopyrite Copper sulfide visual_art visual_art.visual_art_medium Depressant 0210 nano-technology Nuclear chemistry |
| Zdroj: | Minerals, Vol 10, Iss 2, p 157 (2020) Minerals Volume 10 Issue 2 |
| ISSN: | 2075-163X |
| DOI: | 10.3390/min10020157 |
| Popis: | Sodium thioglycolate is a chalcopyrite depressant, but its depressant effect is weak. The paper investigated the effect of CuSO4 on the depressant performance of sodium thioglycolate towards chalcopyrite through flotation tests, Zeta potential measurements, X-ray photoelectron spectroscopy (XPS) analyses and Fourier-transform infrared (FTIR) spectra measurements. It was found that copper ions could improve the depressant effect of sodium thioglycolate on chalcopyrite. The results showed that copper ions could adsorb on the surface of chalcopyrite and form mixed copper sulfide and cupric oxides/hydroxides adsorption layers. As a result, the mineral composition on the chalcopyrite surface was changed. With sodium thioglycolate treatment, the Zeta potential and the adsorption sites of chalcopyrite surface were both increased, and the hydrophobic substance Sn2&minus /S0 concentration was decreased. The electrostatic repulsion of chalcopyrite surface with sodium thioglycolate was also decreased, which made the sodium thioglycolate interact with chalcopyrite more easily. The more active sites could adsorb more sodium thioglycolate, which improved the hydrophilia of chalcopyrite. At the same time, the decrease of Sn2&minus /S0 concentration could further improve the hydrophilia of chalcopyrite. The results show that the copper ions could exhibit auxiliary effect with sodium thioglycolate and could further enhance the depressant effect of sodium thioglycolate on the chalcopyrite flotation. This paper provides new insights into the depression of chalcopyrite flotation by sodium thioglycolate. |
| Databáze: | OpenAIRE |
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