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Chemistry · L4 · Blast Furnace Flux: Limestone to Slag

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How limestone added to a blast furnace decomposes and reacts with the ore's silica impurity to form molten slag, which floats free of the iron and is drained off on its own.

by @openstemUpdated Chemistry
Limestone (CaCO3)added to the furnaceCaCO3 → CaO + CO2Calcium oxide (CaO)Silica (SiO2) impurityin the iron oreCaO + SiO2 → CaSiO3Molten calciumsilicate slagFloats on the densermolten ironDrained off separately —sold for road-building

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