12. How is iron ore turned into steel?
In this process, the two main elements are iron ore and coking coal. Firstly, coking coal, iron ore, and limestone are combined to the blast furnace (metallurgical furnace used for smelting). During this process, heated air is blown into the base of the furnace to speed up the process of combustion. This combustion of iron ore with other elements produces molten pig iron, which is later converted into steel. Limestone helps in capturing the impurities in the blast furnace.
