The design of a macromolecular depressant for galena based on DFT studies and its application
| Autor: | Zheng Guibing, Zhibo Qian, Wu Weiguo, Zhu Yangge, Xingrong Zhang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
medicine.drug_class
Inorganic chemistry Infrared spectroscopy 02 engineering and technology engineering.material 020501 mining & metallurgy Adsorption Galena medicine Dithiocarbamate chemistry.chemical_classification Mineral Chemistry Chalcopyrite Mechanical Engineering General Chemistry 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology 0205 materials engineering Control and Systems Engineering visual_art engineering visual_art.visual_art_medium Depressant Density functional theory 0210 nano-technology |
| Zdroj: | Minerals Engineering. 112:50-56 |
| ISSN: | 0892-6875 |
| DOI: | 10.1016/j.mineng.2017.07.007 |
| Popis: | In this paper, a novel macromolecular depressant polymaleamide-propyl dithiocarbamate (PMA-PDTC) was designed and synthesized according to density functional theory (DFT) calculations results, and its structure was characterized by infrared spectra (IR). The flotation experiments results demonstrated that PMA-PDTC was an effective depressant for galena in separating galena from chalcopyrite, and it exhibited a stronger depressing ability and a better selectivity for galena than for chalcopyrite. When the dosage of PMA-PDTC was 2.0 mg/L, a good separation result was obtained with O-isopropyl-N-ethyl thionocarbamate (IPETC) as collector at pH 8.5 for an artificial mixture of Cu-Pb minerals. The Cu concentrate could reach a grade of 28.89% containing 12.12% Pb, and the Pb concentrate could reach a grade of 80.65% containing 1.49% Cu. The experimental results agreed with the DFT calculations results well, which indicated that DFT method was useful for predicting the adsorption strength of some molecules on mineral surfaces and for guiding the design of the depressant for galena or other minerals. |
| Databáze: | OpenAIRE |
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