Kinetics of carbothermic reduction of synthetic chromite
In order to optimize the current reduction process of chromite, a good knowledge of reduction mechanism involved is required. The basic component in chromite ore is FeCr2O4, thus, kinetic investigation of synthetic FeCr2O4 with different amount of carbon were carried out in the temperature...
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| Language: | English |
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University of Belgrade, Technical Faculty, Bor
2014-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2014/1450-53391400008W.pdf |
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| author | Wang Y. Wang L. Yu J. Chou K.C. |
| author_facet | Wang Y. Wang L. Yu J. Chou K.C. |
| author_sort | Wang Y. |
| collection | DOAJ |
| description | In order to optimize the current reduction process of chromite, a good
knowledge of reduction mechanism involved is required. The basic component in
chromite ore is FeCr2O4, thus, kinetic investigation of synthetic FeCr2O4
with different amount of carbon were carried out in the temperature range of
1473K to 1673K under both isothermal and non-isothermal mode. The iron can be
easily reduced compared with chromium. And higher reduction degree of
chromite can be achieved by increasing temperature and carbon content. With
the supporting of X-ray Diffraction and Scanning Electron Microscope methods,
the formation of metallic products followed the sequence: Fe-C alloy,
(Fe,Cr)7C3and Fe-Cr-C alloy. Kinetics analysis showed that the first stage
was controlled by nucleation with an apparent activation energy of 120kJ/mol,
while the chromium reduction was controlled by crystallochemical
transformation with an apparent activation energy of 288kJ/mol. |
| format | Article |
| id | doaj-art-7961f3459cf94323ace3ccf94ad1e4bd |
| institution | Kabale University |
| issn | 1450-5339 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-7961f3459cf94323ace3ccf94ad1e4bd2025-02-02T17:16:19ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392014-01-01501152110.2298/JMMB130125008W1450-53391400008WKinetics of carbothermic reduction of synthetic chromiteWang Y.0Wang L.1Yu J.2Chou K.C.3University of Science and Technology Beijing, State Key Laboratory of Advanced Metallurgy, Beijing, China + University of Science and Technology Beijing, School of Metallurgical and Ecological Engineering, Department of Physical Chemistry, Beijing, ChinaUniversity of Science and Technology Beijing, State Key Laboratory of Advanced Metallurgy, Beijing, China + University of Science and Technology Beijing, School of Metallurgical and Ecological Engineering, Department of Physical Chemistry, Beijing, ChinaUniversity of Science and Technology Beijing, State Key Laboratory of Advanced Metallurgy, Beijing, China + University of Science and Technology Beijing, School of Metallurgical and Ecological Engineering, Department of Physical Chemistry, Beijing, ChinaUniversity of Science and Technology Beijing, State Key Laboratory of Advanced Metallurgy, Beijing, China + University of Science and Technology Beijing, School of Metallurgical and Ecological Engineering, Department of Physical Chemistry, Beijing, ChinaIn order to optimize the current reduction process of chromite, a good knowledge of reduction mechanism involved is required. The basic component in chromite ore is FeCr2O4, thus, kinetic investigation of synthetic FeCr2O4 with different amount of carbon were carried out in the temperature range of 1473K to 1673K under both isothermal and non-isothermal mode. The iron can be easily reduced compared with chromium. And higher reduction degree of chromite can be achieved by increasing temperature and carbon content. With the supporting of X-ray Diffraction and Scanning Electron Microscope methods, the formation of metallic products followed the sequence: Fe-C alloy, (Fe,Cr)7C3and Fe-Cr-C alloy. Kinetics analysis showed that the first stage was controlled by nucleation with an apparent activation energy of 120kJ/mol, while the chromium reduction was controlled by crystallochemical transformation with an apparent activation energy of 288kJ/mol.http://www.doiserbia.nb.rs/img/doi/1450-5339/2014/1450-53391400008W.pdfchromitecarbothermical reductionKinetics |
| spellingShingle | Wang Y. Wang L. Yu J. Chou K.C. Kinetics of carbothermic reduction of synthetic chromite Journal of Mining and Metallurgy. Section B: Metallurgy chromite carbothermical reduction Kinetics |
| title | Kinetics of carbothermic reduction of synthetic chromite |
| title_full | Kinetics of carbothermic reduction of synthetic chromite |
| title_fullStr | Kinetics of carbothermic reduction of synthetic chromite |
| title_full_unstemmed | Kinetics of carbothermic reduction of synthetic chromite |
| title_short | Kinetics of carbothermic reduction of synthetic chromite |
| title_sort | kinetics of carbothermic reduction of synthetic chromite |
| topic | chromite carbothermical reduction Kinetics |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2014/1450-53391400008W.pdf |
| work_keys_str_mv | AT wangy kineticsofcarbothermicreductionofsyntheticchromite AT wangl kineticsofcarbothermicreductionofsyntheticchromite AT yuj kineticsofcarbothermicreductionofsyntheticchromite AT choukc kineticsofcarbothermicreductionofsyntheticchromite |