Using Iron Ore Ultra-Fines for Hydrogen-Based Fluidized Bed Direct Reduction-A Mathematical Evaluation

This mathematical evaluation focuses on iron ore ultra-fines for their use in a novel hydrogen-based fluidized bed direct reduction process. The benefits of such a process include reduced CO emissions and energy consumption per ton of product, lower operational and capital expenditure, and a higher...

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Bibliographic Details
Published in:Materials 2022-06, Vol.15 (11), p.3943
Main Authors: Wolfinger, Thomas, Spreitzer, Daniel, Schenk, Johannes
Format: Article
Language:English
Subjects:
Agglomeration
Analytical chemistry
Direct reduced iron
Energy consumption
Evaluation
Fluid dynamics
Fluidized bed reduction
Fluidized beds
Hydrogen
Hydrogen reduction
Iron compounds
Iron ores
Mathematical analysis
Particle size
Reynolds number
State (computer science)
Steel production
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Summary:This mathematical evaluation focuses on iron ore ultra-fines for their use in a novel hydrogen-based fluidized bed direct reduction process. The benefits of such a process include reduced CO emissions and energy consumption per ton of product, lower operational and capital expenditure, and a higher oxide yield. Typical samples of iron ore ultra-fines, such as pellet feed, are given and classified for a fluidized bed. An operating field for a hydrogen-based fluidized bed direct reduction process using iron ore ultra-fines is shown in the fluidized state diagram following Reh's approach and compared to other processes. The effects of the process conditions and the agglomeration phenomenon sticking were analyzed and evaluated with mathematical case studies. The agglomeration phenomenon sticking was identified as the most critical issue; thus, the dependencies of the fluid dynamics on the characteristic diameter were examined.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma15113943