Extraction of Iron in a Blast Furnace
The significant reactions occuring within the Blast Furnace can be described via the following steps showing how the reducing agent varies depending on the height in the furnace (i.e. on the Temperature).

The Blast Furnace
At 500 °C
3Fe2O3 +CO → 2Fe3O4 + CO2
Fe2O3 +CO → 2FeO + CO2		 blast furnace
At 850 °C
Fe3O4 +CO → 3FeO + CO2
At 1000 °C
FeO +CO → Fe + CO2
At 1300 °C
CO2 + C → 2CO
At 1900 °C
C+ O2 → CO2
FeO +C → Fe + CO
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