In the extraction of iron from hematite,what | vedclass

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(A) In the blast furnace,limestone $(CaCO_3)$ decomposes to form calcium oxide $(CaO)$ and carbon dioxide $(CO_2)$.$CaCO_3 \rightarrow CaO + CO_2$Here

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Flux

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(A) In the blast furnace,limestone $(CaCO_3)$ decomposes to form calcium oxide $(CaO)$ and carbon dioxide $(CO_2)$.$CaCO_3 \rightarrow CaO + CO_2$Here,$CaO$ acts as a flux which reacts with the silica $(SiO_2)$ impurity present in the ore to form calcium silicate $(CaSiO_3)$,which is known as slag.$CaO + SiO_2 \rightarrow CaSiO_3$ (Slag)Thus,limestone acts as a flux.

In the extraction of iron from hematite,what is the role of limestone?

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