Analyze the sequence of reduction reactions occurring in the upper, cooler zone () of the Iron Blast — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

As Haematite descends and encounters rising $CO$ gas, it is reduced stepwise to progressively lower oxidation states: $3Fe_2O_3 + CO \rightarrow 2Fe_3O_4 + CO_2$. Then, $Fe_3O_4 + CO \rightarrow 3FeO + CO_2$. Finally, $FeO + CO \rightarrow Fe + CO_2$.