Iron Making:

One of the most popular Iron Making process is Blast Furnace. A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally iron. In a blast furnace, fuel, ore, and flux (limestone) are continuously supplied through the top of the furnace, while a hot blast of air is blown into the lower section of the furnace through a series of pipes called tuyeres, so that the chemical reactions take place throughout the furnace as the material moves downward. The end products are usually molten pig iron and slag phases tapped from the bottom, and flue gases exiting from the top of the furnace.