Investigation of mechanism and kinetics of chalcopyrite concentrate oxidation process
| Autor: | M. Sokić, I. Ilić, D. Živković, N. Vučković |
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| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Metalurgija Volume 47 Issue 2 |
| ISSN: | 1334-2576 0543-5846 |
| Popis: | The oxidation process of chalcopyrite concentrate ″Rudnik″ (Serbia) was investigated by DTA-TG measurements under air conditions in the temperature range of 298 – 1173 K, as well as by XRD analysis of the oxidation products at 723, 873 and 1173 K. Based on the results obtained, the mechanism of chalcopyrite concentrate oxidation process was given, contributing to the understanding of the successive chemical reactions accompanying the formation of intermediate products. The kinetic study of the investigated process was done according to the methods of Kissinger and Ozawa, which enabled determination of the activation energy values of the chemical reactions proceeding during the chacopyrite concentrate oxidation. Proces oksidacije halkopiritnog koncentrata ″Rudnik″ (Srbija) ispitivan je DTA-TG mjerenjima u atmosferi zraka i temperaturnom intervalu 298–1173 K, kao i XRD analizama produkata oksidacije na 723, 873 i 1173 K. Na temelju dobivenih rezultata predložen je mehanizam oksidacije halkopiritnog koncentrata uključujući i kemijske reakcije koje prate stvaranje odgovarajućih međuproizvoda. Za ispitivanje kinetike procesa rabljene su metode Kissinger i Ozawa, kojima su određene vrijednosti energija aktivacije kemijskih reakcija tokom oksidacije halkopiritnog koncentrata. |
| Databáze: | OpenAIRE |
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