| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Energy Technologies and CO2 Management
|
| Presentation Title |
Reduction Behaviors of Hematite to Metallic Iron by Hydrogen at Low Temperatures |
| Author(s) |
Kun He, Zhong Zheng, Hongsheng Chen, Weiping Hao |
| On-Site Speaker (Planned) |
Kun He |
| Abstract Scope |
The efficiency use of hydrogen in iron and steel manufacturing is essential for reducing energy use and CO2 emissions. The reduction behavious of Brazilian hematite in 20%H2 (rest is Ar) at 400–570℃ were investigated in a micro fluidized bed. The crystalline phases, morphological, and internal structure of reduction products were examined. The results indicate that the reaction of hematite to metallic iron can be divided into two stages based on the conversion X, the first stage is the processes of Fe2O3→Fe3O4 at X<1/9, and the reaction of Fe3O4→Fe constituted the second stage. The rate constants of all individual reactions were increased with increasing temperatures. The number of pores and fissures were observed, as magnetite formed gradually, on the surface of ore and peripheral part of unreacted core of hematite. The reaction rate of the overall reduction was determined by phase boundary reaction. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Iron and Steel, Other |