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