Knowledge Management System Of Institute of process engineering,CAS
| Enhanced reduction of ilmenite ore by pre-oxidation in the view of pore formation | |
Zhang, Xu1,2 ; Du, Zhan1; Zhu, Qingshan1,2; Li, Jun1; Xie, Zhaohui1
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| 2022-06-01 | |
| Source Publication | POWDER TECHNOLOGY
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| ISSN | 0032-5910 |
| Volume | 405Pages:12 |
| Abstract | The promotion effect of pre-oxidation on reduction of ilmenite was revealed from the view of pore formation. The result shows that the enhancement of pre-oxidation on reduction of ilmenite ore is attributed to the formation of porous structure during the reduction process. Reduction of ilmenite is inhibited by iron-rutile topology structure formed on the particle surface. By contrast, porous structure ilmenite is regenerated during the ferric-to-ferrous reduction stage of the pre-oxidized ilmenite with dominant reduction rate over diffusion rate of produced ferrous omega & GE; 33.2 mol/m4. The newly formed porous structure ilmenite enlarges particle surface area with facilitated gas-solid contact, thus it is responsible for the enhancement of the reduction of pre-oxidized ilmenite. A novel formation mechanism of porous structure is also proposed based on the competition and coordination between the reduction rate and diffusion rate determined by reduction potential and temperature. |
| Keyword | Reduction Pre-oxidization Ilmenite Fluidization Porous structure |
| DOI | 10.1016/j.powtec.2022.117539 |
| Language | 英语 |
| WOS Keyword | CARBOTHERMIC REDUCTION ; MICROSTRUCTURAL CHANGES ; HYDROGEN REDUCTION ; CONCENTRATE POWDER ; GASEOUS REDUCTION ; NATURAL ILMENITE ; CHEMICAL PATHWAY ; OXYGEN CARRIER ; REDOX CYCLES ; TI METAL |
| Funding Project | National Natural Science Foundation of China[21736010] ; National Natural Science Foundation of China[21978300] |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Chemical |
| Funding Organization | National Natural Science Foundation of China |
| WOS ID | WOS:000809762300004 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/53955 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Zhu, Qingshan; Li, Jun |
| Affiliation | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China |
| First Author Affilication | Center of lonic Liquids and Green Engineering |
| Corresponding Author Affilication | Center of lonic Liquids and Green Engineering |
| Recommended Citation GB/T 7714 | Zhang, Xu,Du, Zhan,Zhu, Qingshan,et al. Enhanced reduction of ilmenite ore by pre-oxidation in the view of pore formation[J]. POWDER TECHNOLOGY,2022,405:12. |
| APA | Zhang, Xu,Du, Zhan,Zhu, Qingshan,Li, Jun,&Xie, Zhaohui.(2022).Enhanced reduction of ilmenite ore by pre-oxidation in the view of pore formation.POWDER TECHNOLOGY,405,12. |
| MLA | Zhang, Xu,et al."Enhanced reduction of ilmenite ore by pre-oxidation in the view of pore formation".POWDER TECHNOLOGY 405(2022):12. |
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