Iron is extracted from its ores in a blast furnace.
Name the raw material added to the blast furnace that serves as the primary source of carbon.
State the role of the oxygen in the hot air blown into the bottom of the blast furnace.
Explain how carbon monoxide, the primary reducing agent in the furnace, is formed from carbon. Include two chemical equations.
Write the balanced chemical equation for the reduction of magnetite, Fe3O4\text{Fe}_3\text{O}_4Fe3O4, by carbon monoxide to produce iron and carbon dioxide.
