In the extraction of iron in the blast furnace, limestone is used to?

Azeez1902

6 years ago

It is not the limestone that remove the impurities, its function is to supply CaO and CO2 after undergoing thermal decomposition, for the reaction at the middle of the furnace. It is the CaO that does remove the impurities as slag. So, the answer is A.

Lenz01

3 years ago

The main function is to release CO2 that reacts with the impurities to form slag.