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a. 'The ore mixed with coke and limeston...

a. 'The ore mixed with coke and limestone is introduced into the blast furnace. What is the purpose of adding limestone?

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a. Lifnestone acts as a flex in the blast furnace. It is used to remove the impurities like .SiO_2. present along with the ore. Limestone decomposes to give quick lime .(CaO) "which reacts with sandy impurities like .SiO_2. to form slag. .. beginarray/l CaCO_3 rarr CaO+CO_2^* CaO+SiO_2 rarr CaSiO_3 endarray .. B. TABLE
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