Detailed Modeling of the Direct Reduction of Iron Ore in a Shaft Furnace
| Autor: | Olivier Mirgaux, Fabrice Patisson, Hamzeh Hamadeh |
|---|---|
| Přispěvatelé: | Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Pellets iron ore engineering.material lcsh:Technology 7. Clean energy Article ironmaking direct reduction Mass transfer Thermal [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering lcsh:Microscopy lcsh:QC120-168.85 heat and mass transfer Momentum (technical analysis) Finite volume method lcsh:QH201-278.5 metallurgy lcsh:T Mechanics Conical surface [CHIM.MATE]Chemical Sciences/Material chemistry Iron ore lcsh:TA1-2040 [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other] DRI engineering lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering heterogeneous kinetics lcsh:Engineering (General). Civil engineering (General) Reduction (mathematics) lcsh:TK1-9971 shaft furnace mathematical model |
| Zdroj: | Materials Materials, MDPI, 2018, 11 (10), pp.1865. ⟨10.3390/ma11101865⟩ Materials, Vol 11, Iss 10, p 1865 (2018) Volume 11 Issue 10 |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma11101865⟩ |
| Popis: | This paper addresses the modeling of the iron ore direct reduction process, a process likely to reduce CO2 emissions from the steel industry. The shaft furnace is divided into three sections (reduction, transition, and cooling), and the model is two-dimensional (cylindrical geometry for the upper sections and conical geometry for the lower one), to correctly describe the lateral gas feed and cooling gas outlet. This model relies on a detailed description of the main physical&ndash chemical and thermal phenomena, using a multi-scale approach. The moving bed is assumed to be comprised of pellets of grains and crystallites. We also take into account eight heterogeneous and two homogeneous chemical reactions. The local mass, energy, and momentum balances are numerically solved, using the finite volume method. This model was successfully validated by simulating the shaft furnaces of two direct reduction plants of different capacities. The calculated results reveal the detailed interior behavior of the shaft furnace operation. Eight different zones can be distinguished, according to their predominant thermal and reaction characteristics. An important finding is the presence of a central zone of lesser temperature and conversion. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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