Kinetics Calculation of the Non-isothermal Reduction of Pellet
The reduction tests of pellet were carried out from room temperature to 1,373 K in the condition of traditional blast furnace (TBF) and oxygen blast furnace (OBF) by thermogravimeter measurement. The apparent activation energy E, pre-exponential factor A and the controlling steps of reaction were de...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2016-05-01
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| Series: | High Temperature Materials and Processes |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/htmp-2015-0034 |
| _version_ | 1818909054069637120 |
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| author | Yingli Liu Jingsong Wang Wentao Guo Zeshang Dong Qingguo Xue |
| author_facet | Yingli Liu Jingsong Wang Wentao Guo Zeshang Dong Qingguo Xue |
| author_sort | Yingli Liu |
| collection | DOAJ |
| description | The reduction tests of pellet were carried out from room temperature to 1,373 K in the condition of traditional blast furnace (TBF) and oxygen blast furnace (OBF) by thermogravimeter measurement. The apparent activation energy E, pre-exponential factor A and the controlling steps of reaction were determined by the non-isothermal method of Coats–Redfern. In the condition of TBF, the reduction is controlled by solid diffusion to interfacial chemical reaction at initial stage, and gas diffusion at final stage. In the condition of OBF, the controlling step switched from solid diffusion to gas diffusion + interfacial chemical reaction in the beginning and the interfacial chemical reaction at the late stage. Meanwhile, the transition temperature points of the controlling step were predicted. The transition temperatures are 750℃ and 900℃ in TBF and 630℃ (earlier 120℃ than in TBF) and 900℃ (after the insulation) in OBF. |
| first_indexed | 2024-12-19T22:20:48Z |
| format | Article |
| id | doaj.art-7165544f5b9d4ef48b83bfbffe2e8b03 |
| institution | Directory Open Access Journal |
| issn | 0334-6455 2191-0324 |
| language | English |
| last_indexed | 2024-12-19T22:20:48Z |
| publishDate | 2016-05-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | High Temperature Materials and Processes |
| spelling | doaj.art-7165544f5b9d4ef48b83bfbffe2e8b032022-12-21T20:03:39ZengDe GruyterHigh Temperature Materials and Processes0334-64552191-03242016-05-0135550751410.1515/htmp-2015-0034Kinetics Calculation of the Non-isothermal Reduction of PelletYingli Liu0Jingsong Wang1Wentao Guo2Zeshang Dong3Qingguo Xue4State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, ChinaThe reduction tests of pellet were carried out from room temperature to 1,373 K in the condition of traditional blast furnace (TBF) and oxygen blast furnace (OBF) by thermogravimeter measurement. The apparent activation energy E, pre-exponential factor A and the controlling steps of reaction were determined by the non-isothermal method of Coats–Redfern. In the condition of TBF, the reduction is controlled by solid diffusion to interfacial chemical reaction at initial stage, and gas diffusion at final stage. In the condition of OBF, the controlling step switched from solid diffusion to gas diffusion + interfacial chemical reaction in the beginning and the interfacial chemical reaction at the late stage. Meanwhile, the transition temperature points of the controlling step were predicted. The transition temperatures are 750℃ and 900℃ in TBF and 630℃ (earlier 120℃ than in TBF) and 900℃ (after the insulation) in OBF.https://doi.org/10.1515/htmp-2015-0034oxygen blast furnacenon-isothermalkineticspellet |
| spellingShingle | Yingli Liu Jingsong Wang Wentao Guo Zeshang Dong Qingguo Xue Kinetics Calculation of the Non-isothermal Reduction of Pellet High Temperature Materials and Processes oxygen blast furnace non-isothermal kinetics pellet |
| title | Kinetics Calculation of the Non-isothermal Reduction of Pellet |
| title_full | Kinetics Calculation of the Non-isothermal Reduction of Pellet |
| title_fullStr | Kinetics Calculation of the Non-isothermal Reduction of Pellet |
| title_full_unstemmed | Kinetics Calculation of the Non-isothermal Reduction of Pellet |
| title_short | Kinetics Calculation of the Non-isothermal Reduction of Pellet |
| title_sort | kinetics calculation of the non isothermal reduction of pellet |
| topic | oxygen blast furnace non-isothermal kinetics pellet |
| url | https://doi.org/10.1515/htmp-2015-0034 |
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