Research Article
Selection of an Inert Gas System for the Transportation of Direct Reduced Iron
Table 2
Reaction chain showing reduction and carburization reactions.
| Reduction reactions | 1 | 1 | Fe2O3 + 3CO 2Fe + 3CO2 | Hematite (Fe2O3) 69.9% Fe 30.1% O | 2 | 3Fe2O3 + CO 2Fe3O4 + CO2 | 3 | 3Fe2O3 + H2 2Fe3O4 + H2O | 4 | Fe2O3 + 3H2 2Fe + 3H2O | 5 | 3Fe2O3 + C 2Fe3O4 + CO |
| 2 | 1 | Fe3O4 + C 3FeO + CO2 | Magnetite (Fe3O4) 72.4% Fe 27.6% O | 2 | Fe3O4 + CO 3Fe + CO2 | 3 | Fe3O4 + H2 3FeO + H2O | 4 | Fe3O4 + 4CO 3Fe + 4CO2 | 5 | Fe3O4 + 4H2 3Fe + 4H2O |
| 3 | 1 | FeO + C Fe + CO | Magnetite (Fe3O4) 77.7% Fe 22.3% O | 2 | FeO + CO Fe + CO2 | 3 | FeO + H2 Fe + H2O |
| Carburization reactions | 4 | 1 | 3Fe + CH4 Fe3C + 2H2 | Metallic iron 100% Fe 0% O | 2 | 3Fe + 2CO Fe3C + CO2 | 3 | 3Fe + CO + H2 Fe3C + H2O | 4 | Fe + CO + H2 Fe (Cfree) + H2O |
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