Reduction mechanism of titanomagnetite concentrate by carbon monoxide
Titanomagnetite concentrate was reduced by CO-Ar gas mixtures in a laboratory fixed bed reactor in the temperature range from 1123 to 1323 K. The influences of reductive conditions on the reduction rate and metallization degree including reduction temperature, reduction time and carbon mono...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
University of Belgrade, Technical Faculty, Bor
2013-01-01
|
| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2013/1450-53391300020S.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832570533047173120 |
|---|---|
| author | Sun H.Y. Dong X.J. She X.F. Xue Q.G. Wang J.S. |
| author_facet | Sun H.Y. Dong X.J. She X.F. Xue Q.G. Wang J.S. |
| author_sort | Sun H.Y. |
| collection | DOAJ |
| description | Titanomagnetite concentrate was reduced by CO-Ar gas mixtures in a laboratory
fixed bed reactor in the temperature range from 1123 to 1323 K. The
influences of reductive conditions on the reduction rate and metallization
degree including reduction temperature, reduction time and carbon monoxide
content were studied. And the characteristics of reduced samples were
analyzed by XRD, BES and EDS. Results shown that both the reduction and
metallization degree increased with the increasing of temperature and
monoxide content. The low reduction degree was owing to the low iron oxides
content and high impurities content such as magnesium oxide in
titanomagnetite concentrate. Above 1123 K, the reduction is controlled by
interfacial chemical reaction at early stage of the reaction and then turns
to the internal diffusion controlling with reaction processing. The reduction
path at temperatures above 1123 K is suggested as follow: Fe3-xTixO4 →
(x+y-1)FeO + Fe4-2x-yTixO4-y → (x+y-1)Fe + Fe4-2x-yTixO4-y → (3-x)Fe + xTiO2
(0<y<4-2x, x=0.27±0.02) |
| format | Article |
| id | doaj-art-e32a82e773e142bf945effd86794480c |
| institution | Kabale University |
| issn | 1450-5339 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-e32a82e773e142bf945effd86794480c2025-02-02T15:38:58ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392013-01-0149326327010.2298/JMMB121001020S1450-53391300020SReduction mechanism of titanomagnetite concentrate by carbon monoxideSun H.Y.0Dong X.J.1She X.F.2Xue Q.G.3Wang J.S.4University of Science and Technology Beijing, State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, Beijing, ChinaUniversity of Science and Technology Beijing, State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, Beijing, ChinaUniversity of Science and Technology Beijing, State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, Beijing, ChinaUniversity of Science and Technology Beijing, State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, Beijing, ChinaUniversity of Science and Technology Beijing, State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, Beijing, ChinaTitanomagnetite concentrate was reduced by CO-Ar gas mixtures in a laboratory fixed bed reactor in the temperature range from 1123 to 1323 K. The influences of reductive conditions on the reduction rate and metallization degree including reduction temperature, reduction time and carbon monoxide content were studied. And the characteristics of reduced samples were analyzed by XRD, BES and EDS. Results shown that both the reduction and metallization degree increased with the increasing of temperature and monoxide content. The low reduction degree was owing to the low iron oxides content and high impurities content such as magnesium oxide in titanomagnetite concentrate. Above 1123 K, the reduction is controlled by interfacial chemical reaction at early stage of the reaction and then turns to the internal diffusion controlling with reaction processing. The reduction path at temperatures above 1123 K is suggested as follow: Fe3-xTixO4 → (x+y-1)FeO + Fe4-2x-yTixO4-y → (x+y-1)Fe + Fe4-2x-yTixO4-y → (3-x)Fe + xTiO2 (0<y<4-2x, x=0.27±0.02)http://www.doiserbia.nb.rs/img/doi/1450-5339/2013/1450-53391300020S.pdftitanomagnetite concentratereductioncarbon monoxidereduction pathreduction kinetics |
| spellingShingle | Sun H.Y. Dong X.J. She X.F. Xue Q.G. Wang J.S. Reduction mechanism of titanomagnetite concentrate by carbon monoxide Journal of Mining and Metallurgy. Section B: Metallurgy titanomagnetite concentrate reduction carbon monoxide reduction path reduction kinetics |
| title | Reduction mechanism of titanomagnetite concentrate by carbon monoxide |
| title_full | Reduction mechanism of titanomagnetite concentrate by carbon monoxide |
| title_fullStr | Reduction mechanism of titanomagnetite concentrate by carbon monoxide |
| title_full_unstemmed | Reduction mechanism of titanomagnetite concentrate by carbon monoxide |
| title_short | Reduction mechanism of titanomagnetite concentrate by carbon monoxide |
| title_sort | reduction mechanism of titanomagnetite concentrate by carbon monoxide |
| topic | titanomagnetite concentrate reduction carbon monoxide reduction path reduction kinetics |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2013/1450-53391300020S.pdf |
| work_keys_str_mv | AT sunhy reductionmechanismoftitanomagnetiteconcentratebycarbonmonoxide AT dongxj reductionmechanismoftitanomagnetiteconcentratebycarbonmonoxide AT shexf reductionmechanismoftitanomagnetiteconcentratebycarbonmonoxide AT xueqg reductionmechanismoftitanomagnetiteconcentratebycarbonmonoxide AT wangjs reductionmechanismoftitanomagnetiteconcentratebycarbonmonoxide |