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Blast Furnace With 100 Iron Ore

The blast furnace reduces practically all of the iron present in the ore into the pig iron, and, therefore, if the ore contains 50 per cent of metallic iron and the pig iron 90 per cent, it will take 0.90 - 0.56 180 parts of ore to furnish the iron in 100 parts of pig iron.The amount of ore to be used per unit of pig iron made is there-.