Q.20. Why is limestone added of the blast furnace in the extractionof – InterviewSolution

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1.	Q.20. Why is limestone added of the blast furnace in the extractionof iron from haematite?
Answer» Thelimestonedecomposes in the hotfurnace, forming calcium oxide. This reacts with the sandy impurities (silicon dioxide) to form a slag. The main role oflimestonein extraction of iron is to decomposes in hotfurnaceand form the calcium oxide.

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