The coke in the charge of blast furnace
A
Controls the grade of pig iron
B
Acts as an iron bearing mineral
C
Supplies heat to reduce ore and melt the iron
D
Forms a slag by combining with impurities
Correct Answer: Supplies heat to reduce ore and melt the iron
The coke in the charge of blast furnace Supplies heat to reduce ore and melt the iron.The coke is a source of carbon monoxide which will reduce the iron oxide in the ore to iron and the carbon monoxide oxidizes to carbon dioxide.
The limestone acts as a flux to remove other impurities and help the iron physically separate from the rest of the burden.
