Metallurgy, Vol. 54 No. 2, 2015.
Original scientific paper
Thermal analysis and kinetics of the chalcopyrite-pyrite concentrate oxidation process
A. Mitovski
; University of Belgrade, Technical Faculty in Bor, Serbia
N. Štrbac
; University of Belgrade, Technical Faculty in Bor, Serbia
D. Manasijević
; University of Belgrade, Technical Faculty in Bor, Serbia
M. Sokić
; ITNMS, Belgrade, Serbia
A. Daković
; ITNMS, Belgrade, Serbia
D. Živković
; University of Belgrade, Technical Faculty in Bor, Serbia
Lj. Balanović
; University of Belgrade, Technical Faculty in Bor, Serbia
Abstract
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.
Keywords
thermal analysis; copper concentrate; oxidation
Hrčak ID:
128949
URI
Publication date:
1.4.2015.
Visits: 2.390 *