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in Production of Metals by (37.7k points)
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The chemical reaction of calcium carbonate while heating is given.

CaCO2 + Heat → CaO + CO2

How the reaction is made use in the metallurgy of iron?

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CaO is framed by the decomposition of CaCO3 . This CaO acts as a flux and combines with SiO2 (gangue) to form CaSiO3 (Slag).

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