About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
12th International Symposium on High Temperature Metallurgical Processing
|
Presentation Title |
Effect of the Injection Angle of Reducing Gas on Coal Flow and Combustion in a 50% Oxygen Blast Furnace |
Author(s) |
Xing Peng, Jingsong Wang, Zhiyao Li, Haibin Zuo, Xuefeng She, Guang Wang, Qingguo Xue |
On-Site Speaker (Planned) |
Xing Peng |
Abstract Scope |
Medium oxygen-enriched blast furnaces that utilize reducing gas injections are a feasible new ironmaking process that can significantly reduce the coke ratio and carbon dioxide emissions. In this study, a three-dimensional numerical model of lance-blowpipe-tuyere-raceway zone was established, which was used to study the influence of the reducing gas injection angle (30°~70°) on the flow and combustion of pulverized coal in a new tuyere of the 50% oxygen blast furnace. As the injection angle increases, the tuyere kinetic energy first decreases and then increases, and the pulverized coal combustion efficiency increases. Compared with the injection at 30°, the coal particle temperature under the injection conditions of 70° at the raceway outlet increased by 326 K, and the char conversion ratio and the burnout increased by 27.4% and 22.4%, respectively. However, it is worth noting that under the high injection angle, local high temperature appears on the tuyere wall, which requires cooling to avoid damage to the tuyere in the actual blast furnace. |
Proceedings Inclusion? |
Planned: |
Keywords |
Pyrometallurgy, Modeling and Simulation, Iron and Steel |