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6.7 Write down the reactions taking place in different zones in the blast furnace during the extraction of iron.

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At 500-800K

\\3Fe_{2}O_{3}+CO\rightarrow 2Fe_{3}O_{4}+CO_{2}\\ Fe_{3}O_{4}+CO\rightarrow 3Fe+4CO_{2}\\ Fe_{2}O_{3}+CO\rightarrow 2FeO+CO_{2}

limestone also decomposes to calcium oxide which reverses silicate impurity of the ore as slag CaCO_{3}\rightarrow CaO+CO_{2}

At 900-1500K

\\C+CO_{2}\rightarrow 2CO\\ FeO+CO\rightarrow Fe+CO_{2}

CaO+SiO_{2}\rightarrow CaSiO_{3}(slag)

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manish

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