Print Email Facebook Twitter Thermal decomposition reaction kinetics of hematite ore Title Thermal decomposition reaction kinetics of hematite ore Author Chen, Z. (TU Delft (OLD) MSE-3) Zeilstra, Christiaan (Tata Steel Europe Limited) van der Stel, Jan (Tata Steel Europe Limited) Sietsma, J. (TU Delft Materials Science and Engineering; TU Delft (OLD) MSE-3) Yang, Y. (TU Delft (OLD) MSE-3) Department Materials Science and Engineering Date 2020 Abstract In order to understand the thermal decomposition kinetics of hematite particles in inert atmosphere, thermogravimetriy was employed for isoconversional analysis. The kinetic triplet was estimated from the experimental data and the isothermal reaction kinetics was predicted. The results indicated that the thermal decomposition could be divided into two stages, of which the activation energies were 636 kJ/mol and 325 kJ/mol, respectively. The exponential form of pre-exponential factor, ln(A/s−1), for the two stages were estimated to be 42.9±6.6 and 14.1±3.08. At last, the kinetic mechanism of the first stage was suggested to match Sestak-Berggren model as f(α)=(1−α)1.38. The relatively slow reaction rate of the second stage was due to the slag formation during the reaction. Subject HematiteHIsarnaIron oxideIsoconversional kineticsThermal decomposition To reference this document use: http://resolver.tudelft.nl/uuid:71e81747-fd05-4522-a81a-4a4919c47c61 DOI https://doi.org/10.2355/isijinternational.ISIJINT-2019-129 ISSN 0915-1559 Source ISIJ International, 60 (1), 65-72 Part of collection Institutional Repository Document type journal article Rights © 2020 Z. Chen, Christiaan Zeilstra, Jan van der Stel, J. Sietsma, Y. Yang Files PDF 60_ISIJINT_2019_129.pdf 1.07 MB Close viewer /islandora/object/uuid:71e81747-fd05-4522-a81a-4a4919c47c61/datastream/OBJ/view