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

Author:

Lu Yuanxiang1,Jiang Zeyi12,Zhang Xinru13ORCID,E Dianyu45ORCID

Affiliation:

1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China

2. Beijing Key Laboratory for Energy Saving and Emission Reduction of Metallurgical Industry, University of Science and Technology Beijing, Beijing 100083, China

3. Beijing Engineering Research Center of Energy Saving and Environmental Protection, University of Science and Technology Beijing, Beijing 100083, China

4. Jiangxi Provincial Key Laboratory for Simulation and Modelling of Particulate Systems, Jiangxi University of Science and Technology, Nanchang 330013, China

5. International Institute for Innovation, Jiangxi University of Science and Technology, Nanchang 330013, China

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 CO2 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.

Funder

National Key Research and Development Program of China

Fundamental Research Fund for the Central Universities

National Natural Science Foundation of China project

China Postdoctoral Science Foundation Funding

Jiangxi Provincial Natural Science Foundation

Publisher

MDPI AG

Subject

Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction

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