Reduction disintegration behavior and crystallographic transformation of vanadium–titanium magnetite pellets during hydrogen-based reduction
There are many advantages of the smelting of vanadium-titanium magnetite pellets by hydrogen-based shaft furnace pre-reduction and electric arc furnace process, including high reduction efficiency, low carbon dioxide emission and high recovery of titanium and so on. The preparation of qualified vana...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-01-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424028242 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832595371168104448 |
|---|---|
| author | Feng Chen Hao Li Yufeng Guo Kuo Liu Shuai Wang Lingzhi Yang Yuekai Wen Meng Zhang |
| author_facet | Feng Chen Hao Li Yufeng Guo Kuo Liu Shuai Wang Lingzhi Yang Yuekai Wen Meng Zhang |
| author_sort | Feng Chen |
| collection | DOAJ |
| description | There are many advantages of the smelting of vanadium-titanium magnetite pellets by hydrogen-based shaft furnace pre-reduction and electric arc furnace process, including high reduction efficiency, low carbon dioxide emission and high recovery of titanium and so on. The preparation of qualified vanadium-titanium magnetite pellets with low reduction disintegration index (RDI) is prerequisite of this process. The reduction disintegration behavior of vanadium-titanium magnetite pellets during hydrogen-based reduction was systematically investigated in this work, and the crystallographic transformations during the reduction were dug into as well. The RDI+6.3 mm of vanadium-titanium magnetite pellets reached 43.28% after 60 min of reduction at 500 °C in a Midrex atmosphere (36% CO, 5% CO2, 55% H2, and 4% CH4). During the reduction of trigonal titano-hematite [(Fe,Ti)2O3] to cubic titano-magnetite, both the single unit cell volume and the total number of unit cells increased dramatically. The total titanium-iron oxide cell volume expanded nearly sevenfold, from 8.75 × 1022 ų to 5.99 × 1023 ų, causing considerable pellet swelling. Conversely, the reduction of rhombohedral Fe2TiO5 to trigonal FeTiO3 resulted in a decrease in cell volume. Studying the crystalline transformation is crucial for developing effective methods to inhibit low-temperature reduction disintegration, thereby enhancing the comprehensive utilization of vanadium-titanium magnetite resources. |
| format | Article |
| id | doaj-art-0364b358107949458f893a4fc919accb |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-0364b358107949458f893a4fc919accb2025-01-19T06:25:08ZengElsevierJournal of Materials Research and Technology2238-78542025-01-0134152163Reduction disintegration behavior and crystallographic transformation of vanadium–titanium magnetite pellets during hydrogen-based reductionFeng Chen0Hao Li1Yufeng Guo2Kuo Liu3Shuai Wang4Lingzhi Yang5Yuekai Wen6Meng Zhang7School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, China; Corresponding author.School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, China; Sino-Platinum Metals Co., LTD, 650156, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, ChinaThere are many advantages of the smelting of vanadium-titanium magnetite pellets by hydrogen-based shaft furnace pre-reduction and electric arc furnace process, including high reduction efficiency, low carbon dioxide emission and high recovery of titanium and so on. The preparation of qualified vanadium-titanium magnetite pellets with low reduction disintegration index (RDI) is prerequisite of this process. The reduction disintegration behavior of vanadium-titanium magnetite pellets during hydrogen-based reduction was systematically investigated in this work, and the crystallographic transformations during the reduction were dug into as well. The RDI+6.3 mm of vanadium-titanium magnetite pellets reached 43.28% after 60 min of reduction at 500 °C in a Midrex atmosphere (36% CO, 5% CO2, 55% H2, and 4% CH4). During the reduction of trigonal titano-hematite [(Fe,Ti)2O3] to cubic titano-magnetite, both the single unit cell volume and the total number of unit cells increased dramatically. The total titanium-iron oxide cell volume expanded nearly sevenfold, from 8.75 × 1022 ų to 5.99 × 1023 ų, causing considerable pellet swelling. Conversely, the reduction of rhombohedral Fe2TiO5 to trigonal FeTiO3 resulted in a decrease in cell volume. Studying the crystalline transformation is crucial for developing effective methods to inhibit low-temperature reduction disintegration, thereby enhancing the comprehensive utilization of vanadium-titanium magnetite resources.http://www.sciencedirect.com/science/article/pii/S2238785424028242Hydrogen-based reductionPhase transformationCrystallographic transformationVanadium-titanium magnetite pellets |
| spellingShingle | Feng Chen Hao Li Yufeng Guo Kuo Liu Shuai Wang Lingzhi Yang Yuekai Wen Meng Zhang Reduction disintegration behavior and crystallographic transformation of vanadium–titanium magnetite pellets during hydrogen-based reduction Journal of Materials Research and Technology Hydrogen-based reduction Phase transformation Crystallographic transformation Vanadium-titanium magnetite pellets |
| title | Reduction disintegration behavior and crystallographic transformation of vanadium–titanium magnetite pellets during hydrogen-based reduction |
| title_full | Reduction disintegration behavior and crystallographic transformation of vanadium–titanium magnetite pellets during hydrogen-based reduction |
| title_fullStr | Reduction disintegration behavior and crystallographic transformation of vanadium–titanium magnetite pellets during hydrogen-based reduction |
| title_full_unstemmed | Reduction disintegration behavior and crystallographic transformation of vanadium–titanium magnetite pellets during hydrogen-based reduction |
| title_short | Reduction disintegration behavior and crystallographic transformation of vanadium–titanium magnetite pellets during hydrogen-based reduction |
| title_sort | reduction disintegration behavior and crystallographic transformation of vanadium titanium magnetite pellets during hydrogen based reduction |
| topic | Hydrogen-based reduction Phase transformation Crystallographic transformation Vanadium-titanium magnetite pellets |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424028242 |
| work_keys_str_mv | AT fengchen reductiondisintegrationbehaviorandcrystallographictransformationofvanadiumtitaniummagnetitepelletsduringhydrogenbasedreduction AT haoli reductiondisintegrationbehaviorandcrystallographictransformationofvanadiumtitaniummagnetitepelletsduringhydrogenbasedreduction AT yufengguo reductiondisintegrationbehaviorandcrystallographictransformationofvanadiumtitaniummagnetitepelletsduringhydrogenbasedreduction AT kuoliu reductiondisintegrationbehaviorandcrystallographictransformationofvanadiumtitaniummagnetitepelletsduringhydrogenbasedreduction AT shuaiwang reductiondisintegrationbehaviorandcrystallographictransformationofvanadiumtitaniummagnetitepelletsduringhydrogenbasedreduction AT lingzhiyang reductiondisintegrationbehaviorandcrystallographictransformationofvanadiumtitaniummagnetitepelletsduringhydrogenbasedreduction AT yuekaiwen reductiondisintegrationbehaviorandcrystallographictransformationofvanadiumtitaniummagnetitepelletsduringhydrogenbasedreduction AT mengzhang reductiondisintegrationbehaviorandcrystallographictransformationofvanadiumtitaniummagnetitepelletsduringhydrogenbasedreduction |