Smelting furnace used to extract metals from their ores, chiefly pig iron from iron ore. The temperature is raised by the injection of an air blast.
In the extraction of iron the ingredients of the furnace are iron ore (iron(III) oxide), coke (carbon), and limestone (calcium carbonate). The coke is the fuel and provides the agent (carbon monoxide) for the reduction of the iron ore.
The flag is modelled on the Stars and Stripes of the United States' flag. The stripes represent the nine provinces at the time of liberation. Blue and white are the colours of Argentina and also of national hero, José Gervasio Artigas. Effective date: 12 July 1830.