blast furnace

• 1. the burning of carbon (coke) to provide heat and produce carbon dioxide
• 2. the reduction of carbon dioxide to carbon monoxide
• 3. the reduction of iron(III) oxide by carbon monoxide
• 4. the thermal decomposition of calcium carbonate /limestone to produce calcium oxide
• 5. the formation of slag
• (a) C + O2 → CO2
• (b) C + CO2 → 2CO
• (c) Fe2O3 + 3CO → 2Fe + 3CO2
• (d) CaCO3 → CaO + CO2
• (e) CaO + SiO2 → CaSiO3