Oxidizing Roasting Performances of Coke Fines Bearing Brazilian Specularite Pellets
Oxidized pellets, consisting of Brazilian specularite fines and coke fines, were prepared by disc pelletizer using bentonite as binder. The roasting process of pellets includes preheating stage and firing stage. The compressive strength of preheated pellets and fired pellets reached the peak value a...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2016-06-01
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| Series: | High Temperature Materials and Processes |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/htmp-2014-0233 |
| _version_ | 1818716580510433280 |
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| author | Chun Tiejun Zhu Deqing |
| author_facet | Chun Tiejun Zhu Deqing |
| author_sort | Chun Tiejun |
| collection | DOAJ |
| description | Oxidized pellets, consisting of Brazilian specularite fines and coke fines, were prepared by disc pelletizer using bentonite as binder. The roasting process of pellets includes preheating stage and firing stage. The compressive strength of preheated pellets and fired pellets reached the peak value at 1.5% coke fines dosage. During the initial stage of preheating, some original Fe2O3 was reduced to Fe3O4 because of partial reduction atmosphere in pellet. During the later stage of preheating and firing stage, coke fines were burnt out, and the secondary Fe2O3 (new generation Fe2O3) was generated due to the re-oxidization of Fe3O4, which improved the recrystallization of Fe2O3. Compared with the fired pellets without adding coke fines, fired pellets with 1.5% coke fines exhibited the comparable RSI (reduction swelling index) and RDI+3.15 mm (reduction degradation index), and slightly lower RI (reducibility index). |
| first_indexed | 2024-12-17T19:21:31Z |
| format | Article |
| id | doaj.art-547eaab72c164fb2b447032a1cc71f7f |
| institution | Directory Open Access Journal |
| issn | 0334-6455 2191-0324 |
| language | English |
| last_indexed | 2024-12-17T19:21:31Z |
| publishDate | 2016-06-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | High Temperature Materials and Processes |
| spelling | doaj.art-547eaab72c164fb2b447032a1cc71f7f2022-12-21T21:35:31ZengDe GruyterHigh Temperature Materials and Processes0334-64552191-03242016-06-0135661562010.1515/htmp-2014-0233Oxidizing Roasting Performances of Coke Fines Bearing Brazilian Specularite PelletsChun Tiejun0Zhu Deqing1School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan, China, 243002School of Minerals Processing and Bioengineering, Central South University, Changsha, China, 410083Oxidized pellets, consisting of Brazilian specularite fines and coke fines, were prepared by disc pelletizer using bentonite as binder. The roasting process of pellets includes preheating stage and firing stage. The compressive strength of preheated pellets and fired pellets reached the peak value at 1.5% coke fines dosage. During the initial stage of preheating, some original Fe2O3 was reduced to Fe3O4 because of partial reduction atmosphere in pellet. During the later stage of preheating and firing stage, coke fines were burnt out, and the secondary Fe2O3 (new generation Fe2O3) was generated due to the re-oxidization of Fe3O4, which improved the recrystallization of Fe2O3. Compared with the fired pellets without adding coke fines, fired pellets with 1.5% coke fines exhibited the comparable RSI (reduction swelling index) and RDI+3.15 mm (reduction degradation index), and slightly lower RI (reducibility index).https://doi.org/10.1515/htmp-2014-0233brazilian specularite pelletscoke finescompressive strengthmetallurgical performances |
| spellingShingle | Chun Tiejun Zhu Deqing Oxidizing Roasting Performances of Coke Fines Bearing Brazilian Specularite Pellets High Temperature Materials and Processes brazilian specularite pellets coke fines compressive strength metallurgical performances |
| title | Oxidizing Roasting Performances of Coke Fines Bearing Brazilian Specularite Pellets |
| title_full | Oxidizing Roasting Performances of Coke Fines Bearing Brazilian Specularite Pellets |
| title_fullStr | Oxidizing Roasting Performances of Coke Fines Bearing Brazilian Specularite Pellets |
| title_full_unstemmed | Oxidizing Roasting Performances of Coke Fines Bearing Brazilian Specularite Pellets |
| title_short | Oxidizing Roasting Performances of Coke Fines Bearing Brazilian Specularite Pellets |
| title_sort | oxidizing roasting performances of coke fines bearing brazilian specularite pellets |
| topic | brazilian specularite pellets coke fines compressive strength metallurgical performances |
| url | https://doi.org/10.1515/htmp-2014-0233 |
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