KINETICS AND MECHANISM OF THE CHALCOPYRITE-PYRITE CONCENTRATE OXIDATION PROCESS

The results of comparative DTA-TG-DTG analysis of the chalcopyrite-pyr ite concentrate oxidative roasting process are presented in this paper . The chemistry of the process characteristic of the system investigat ed is defined on the basis of comparative analysis of chemical potenti al change in the log p(so2)-log p(o2) diagram, X-ray analysis of oxida tion products at 723, 873 and 1273 K and DTA-TG-DTG results. The activ ation energy values for the investigated processes are determined on t he basis of DTA-TG-DTG results obtained for different heating rates by the methods of Kissinger and Ozawa.