Kinetics and mechanism of the chalcopyrite-pyrite concentrate oxidation process

The results of comparative DTA-TG-DTG analysis of the chalcopyrite-pyrite concentrate oxidative roasting process are presented in this paper. The chemistry of the process characteristic of the system investigated is defined on the basis of comparative analysis of chemical potential change in the log...

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Bibliographic Details
Published in:	Thermochimica acta Vol. 282; pp. 121 - 130
Main Authors:	Z̆ivković, Z̆ivan D., Mitevska, Nataša, Savović, Veselin
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-07-1996
Subjects:	Activation energy Chalcopyrite-pyrite concentrate DTA-TG-DTG Oxidation mechanism Oxidative roasting Sulphide concentrate X-ray diffraction Oxidation mechanism Sulphide concentrate X-ray diffraction Chalcopyrite-pyrite concentrate DTA-TG-DTG Oxidative roasting Activation energy
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Summary:	The results of comparative DTA-TG-DTG analysis of the chalcopyrite-pyrite concentrate oxidative roasting process are presented in this paper. The chemistry of the process characteristic of the system investigated is defined on the basis of comparative analysis of chemical potential change in the log p SO 2 -log p O 2 diagram, X-ray analysis of oxidation products at 723, 873 and 1273 K and DTA-TG-DTG results. The activation energy values for the investigated processes are determined on the basis of DTA-TG-DTG results obtained for different heating rates by the methods of Kissinger and Ozawa.
ISSN:	0040-6031 1872-762X
DOI:	10.1016/0040-6031(96)02883-3