Solid Flow in an Experimental Oxygen Blast Furnace Model: Effects of Recycled Gas and Raceway

Yuanxiang Lu, Zeyi Jiang (), Xinru Zhang and Dianyu E ()
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Yuanxiang Lu: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Zeyi Jiang: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Xinru Zhang: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Dianyu E: Jiangxi Provincial Key Laboratory for Simulation and Modelling of Particulate Systems, Jiangxi University of Science and Technology, Nanchang 330013, China

Energies, 2024, vol. 17, issue 2, 1-12

Abstract: The oxygen blast furnace (OBF) process with top gas recycling is recognized as a promising ironmaking process, due to its high productivity and low CO 2 emissions. The solid flow plays a crucial role in this process. Therefore, the solid flow in OBF was investigated using a cold experimental OBF model in this paper. The results indicate that the plug flow is the primary solid flow pattern in the upper and middle zones of the OBF. A slight convergence flow and a smaller deadman zone were observed at the bosh. The influence of recycled gas on solid flow was found to be quite limited. Additionally, the raceway size affects the burden structure and deadman zone, but the production rate had little impact. Both the raceway size and production rate have different effects on the repose angle of the deadman zone, and it varies by 14–18°. The findings of this study may have important implications for understanding the structure of solid flow in OBF. The results can be used to optimize the process parameters and equipment design to improve the efficiency of iron production while reducing environmental impact.

Keywords: oxygen blast furnace; solid flow; recycled gas; raceway; deadman (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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