What is the role of limestone during the extr | vedclass

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(D) During the extraction of iron from haematite ore,the roasted ore,along with coke and limestone,is heated in a blast furnace. Coke acts as a reduci

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Flux

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(D) During the extraction of iron from haematite ore,the roasted ore,along with coke and limestone,is heated in a blast furnace. Coke acts as a reducing agent,while limestone acts as a flux. Limestone decomposes to form $CaO$,which reacts with acidic impurities like silica $(SiO_2)$ to form calcium silicate $(CaSiO_3)$ slag: $CaCO_3 \rightarrow CaO + CO_2$ $CaO + SiO_2 \rightarrow CaSiO_3$ (slag)

What is the role of limestone during the extraction of iron from haematite ore?

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