Impact of gasification on in-situ thermal strength of tamping coke and top-charging coke: Pore structure, carbon structure, and fracture mechanisms
Tamping coking technology has garnered attention in the ironmaking industry due to its resource efficiency and economic benefits. However, its adaptability under blast furnace conditions remains controversial, limiting its widespread application. Previous studies on tamping coke primarily focused on...
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| Format: | Article |
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Elsevier
2025-10-01
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| Series: | Fuel Processing Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0378382025001055 |
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| author | Wei Wang Bowen Chen Xuheng Chen Jie Wang Hui Tang Changyu Li Kui Zheng Runsheng Xu |
| author_facet | Wei Wang Bowen Chen Xuheng Chen Jie Wang Hui Tang Changyu Li Kui Zheng Runsheng Xu |
| author_sort | Wei Wang |
| collection | DOAJ |
| description | Tamping coking technology has garnered attention in the ironmaking industry due to its resource efficiency and economic benefits. However, its adaptability under blast furnace conditions remains controversial, limiting its widespread application. Previous studies on tamping coke primarily focused on its cold mechanical strength, reactivity, and post-reaction strength, yet the degradation mechanisms of its in-situ thermal strength after gasification and its performance differences compared to top-charging coke under identical conditions remain underexplored. This study simulates blast furnace temperature and atmosphere to compare the thermal tensile strength of gasified tamping coke and top-charging coke via splitting tests. Results indicate that the strength of top-charging coke sharply declines at 1200 °C, while tamping coke retains 51.3 % higher strength. Gasification enhances coke anisotropy and disrupts pore structures, the latter being the primary factor for strength reduction. Fracture analysis reveals two failure modes: brittle overload fracture and defect-induced fracture, with the latter being more prevalent. Tamping coke exhibits fewer structural defects and milder gasification-induced damage, contributing to its superior thermal strength. This study provides new insights for evaluating coke performance under practical blast furnace conditions and supports the industrial adoption of tamping coke. |
| format | Article |
| id | doaj-art-9b6f7cd34adc484e9ff2aeb7b43f9446 |
| institution | Kabale University |
| issn | 0378-3820 |
| language | English |
| publishDate | 2025-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Fuel Processing Technology |
| spelling | doaj-art-9b6f7cd34adc484e9ff2aeb7b43f94462025-08-20T03:58:17ZengElsevierFuel Processing Technology0378-38202025-10-0127610828110.1016/j.fuproc.2025.108281Impact of gasification on in-situ thermal strength of tamping coke and top-charging coke: Pore structure, carbon structure, and fracture mechanismsWei Wang0Bowen Chen1Xuheng Chen2Jie Wang3Hui Tang4Changyu Li5Kui Zheng6Runsheng Xu7Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, ChinaKey Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, ChinaKey Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; State Key Laboratory of Advanced Refractories, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; Corresponding authors at: Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China.Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China; Corresponding authors at: Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China.Guangxi Liuzhou Iron and Steel Group Co., Ltd., Liuzhou 545002, Guangxi, ChinaKey Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, ChinaKey Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; Pangang Group Research Institute Co. Ltd., Panzhihua 617000, Sichuan, ChinaState Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, ChinaTamping coking technology has garnered attention in the ironmaking industry due to its resource efficiency and economic benefits. However, its adaptability under blast furnace conditions remains controversial, limiting its widespread application. Previous studies on tamping coke primarily focused on its cold mechanical strength, reactivity, and post-reaction strength, yet the degradation mechanisms of its in-situ thermal strength after gasification and its performance differences compared to top-charging coke under identical conditions remain underexplored. This study simulates blast furnace temperature and atmosphere to compare the thermal tensile strength of gasified tamping coke and top-charging coke via splitting tests. Results indicate that the strength of top-charging coke sharply declines at 1200 °C, while tamping coke retains 51.3 % higher strength. Gasification enhances coke anisotropy and disrupts pore structures, the latter being the primary factor for strength reduction. Fracture analysis reveals two failure modes: brittle overload fracture and defect-induced fracture, with the latter being more prevalent. Tamping coke exhibits fewer structural defects and milder gasification-induced damage, contributing to its superior thermal strength. This study provides new insights for evaluating coke performance under practical blast furnace conditions and supports the industrial adoption of tamping coke.http://www.sciencedirect.com/science/article/pii/S0378382025001055Tamping cokeGasificationThermal tensile strengthCarbon structurePore structureFracture mechanism |
| spellingShingle | Wei Wang Bowen Chen Xuheng Chen Jie Wang Hui Tang Changyu Li Kui Zheng Runsheng Xu Impact of gasification on in-situ thermal strength of tamping coke and top-charging coke: Pore structure, carbon structure, and fracture mechanisms Fuel Processing Technology Tamping coke Gasification Thermal tensile strength Carbon structure Pore structure Fracture mechanism |
| title | Impact of gasification on in-situ thermal strength of tamping coke and top-charging coke: Pore structure, carbon structure, and fracture mechanisms |
| title_full | Impact of gasification on in-situ thermal strength of tamping coke and top-charging coke: Pore structure, carbon structure, and fracture mechanisms |
| title_fullStr | Impact of gasification on in-situ thermal strength of tamping coke and top-charging coke: Pore structure, carbon structure, and fracture mechanisms |
| title_full_unstemmed | Impact of gasification on in-situ thermal strength of tamping coke and top-charging coke: Pore structure, carbon structure, and fracture mechanisms |
| title_short | Impact of gasification on in-situ thermal strength of tamping coke and top-charging coke: Pore structure, carbon structure, and fracture mechanisms |
| title_sort | impact of gasification on in situ thermal strength of tamping coke and top charging coke pore structure carbon structure and fracture mechanisms |
| topic | Tamping coke Gasification Thermal tensile strength Carbon structure Pore structure Fracture mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S0378382025001055 |
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