The ethylxanthate adsorption on copper-activated sphalerite under flotation-related conditions in alkaline media
| Autor: | D.R. Vučinić, S.R. Popov |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Mineral
Inorganic chemistry Kinetics 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Copper 6. Clean water Electrokinetic phenomena Sphalerite Adsorption chemistry Decantation Geochemistry and Petrology Attenuated total reflection engineering 0210 nano-technology 021102 mining & metallurgy |
| Zdroj: | International Journal of Mineral Processing. 30:229-244 |
| ISSN: | 0301-7516 |
| DOI: | 10.1016/0301-7516(90)90017-s |
| Popis: | Floatability and surface characteristics of sphalerite in the presence of different concentrations of copper sulphate and K-ethylxanthate, for various times of activation and collection, were studied. The resulting changes on the sphalerite surface were determined by infrated attenuated total reflection spectroscopy and correlated with electrokinetic measurement and floatability test results. The collectorless flotation of the examined sphalerite was very weak in alkaline media, independent of whether the mineral was activated with copper or without copper treatment. However, copper showed an activating effect on KEX sphalerite flotation in the alkaline region. Copper ions of high concentration provoked an “apparently depressing effect” on KEX sphalerite flotation, reacting with EX− to form copper-ethylxanthate-like species in the bulk of the solution. After decantation of the solution, before KEX was added, the depressing effect disappeared and sphalerite flotation was virtually complete. Cu(I)-ethylxanthate was the main surface product under the different experimental conditions. The kinetics of the copper-ion adsorption and KEX adsorption was relatively fast. |
| Databáze: | OpenAIRE |
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