Thermal analysis and kinetics of the chalcopyrite-pyrite concentrate oxidation process
| Autor: | A. Mitovski, N. Štrbac, D. Manasijević, M. Sokić, A. Daković, D. Živković, Lj. Balanović |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Metalurgija, Vol 54, Iss 2, Pp 311-314 (2015) |
| Druh dokumentu: | article |
| ISSN: | 0543-5846 1334-2576 |
| Popis: | The paper presents the results of experimental investigation of the chalcopyrite-pyrite concentrate oxidation in the air. Characterisation of the initial sample and oxidation products was done by ICP-AES, XRD, EDXRF methods. Phase stability diagrams were constructed for Cu-Fe-S-O system at 25, 450, 650 and 900 °C. Equilibrium composition of the charge for the optimal oxidation process was calculated. DTA-TG analysis was used for monitoring the oxidation process. Kinetic parameters in non-isothermal conditions were determined, based on Kissinger and Ozawa methods.Values of activation energies showed that all stages of the oxidation process occur in the kinetic field. |
| Databáze: | Directory of Open Access Journals |
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