Kinetic features of breunnerite decarbonization
- Authors: Vusikhis A.S.1, Gulyaeva R.I.1, Leont’ev L.I.1, Ovchinnikova L.A.1, Selivanov E.N.1
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Affiliations:
- Institute of Metallurgy, Ural Branch
- Issue: Vol 2016, No 9 (2016)
- Pages: 793-797
- Section: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/170833
- DOI: https://doi.org/10.1134/S0036029516090172
- ID: 170833
Cite item
Abstract
The decarbonization of breunnerite from talc waste is analyzed by thermogravimetry. The temperatures of thermal effects are determined, and kinetic models for the process are proposed to describe the mechanism of breunnerite decomposition. The unit cell parameters of breunnerite (MgxFe1–x)CO3 and the product of its decomposition, iron–magnesium oxide (Mg,Fe)O, are calculated. The apparent activation energies Ea of the decomposition are calculated using the Ozawa–Flynn–Wall and Kissenger model-free methods and the Avrami–Erofeev one-step model. Depending on the chosen model, the values of Ea range within 180–185 kJ/mol. The conditions of breunnerite roasting for the subsequent use of the obtained material in metallurgical processes are substantiated.
About the authors
A. S. Vusikhis
Institute of Metallurgy, Ural Branch
Author for correspondence.
Email: pcmlab@mail.ru
Russian Federation, ul. Amundsena 101, Yekaterinburg, 620016
R. I. Gulyaeva
Institute of Metallurgy, Ural Branch
Email: pcmlab@mail.ru
Russian Federation, ul. Amundsena 101, Yekaterinburg, 620016
L. I. Leont’ev
Institute of Metallurgy, Ural Branch
Email: pcmlab@mail.ru
Russian Federation, ul. Amundsena 101, Yekaterinburg, 620016
L. A. Ovchinnikova
Institute of Metallurgy, Ural Branch
Email: pcmlab@mail.ru
Russian Federation, ul. Amundsena 101, Yekaterinburg, 620016
E. N. Selivanov
Institute of Metallurgy, Ural Branch
Email: pcmlab@mail.ru
Russian Federation, ul. Amundsena 101, Yekaterinburg, 620016