The effect of heating rate on the decomposition temperature of tincal ore and decomposition kinetics

In this study, thermal treatments were applied to the raw tincal ore, and changes in its decomposition behavior and kinetics were investigated. Thermal decomposition was analyzed using TG, DTG, and DSC techniques, while structural and compositional changes were examined through SEM–EDX, XRD, and FT-IR analyses. The tincal ore was obtained from the Kırka (Eskişehir, Turkey) deposit and prepared by crushing, grinding, and sieving; a particle size of 45 microns was used in all experiments. Thermal analyses were conducted at four different heating rates. The calculated activation energies (Ea) indicated that the decomposition followed a three-dimensional diffusion model (Ginstling–Brounstein). Among the kinetic models evaluated, the FWO and KAS models provided consistent results, whereas the STK model deviated from them.