Extraction of Metals
Extraction of Iron.
Chemistry of the blast furnace.
air is blasted into the furnace causing coke
to burn rapidly producing carbon dioxide
and raising the temperature to 2000 °C.
dioxide + heat.
C(s) + O2(g) CO2(g)
reacts with hot carbon to form carbon monoxide.
dioxide + carbon carbon monoxide.
CO2(g) + C(s) 2CO(g)
Carbon monoxide then reduces iron in the ore to iron metal.
monoxide + iron(III)
carbon dioxide + iron.
3CO(g) + Fe2O3(s) 3CO2(g) + 2Fe(l)
The temperature where the reduction takes place is above 1500
Iron falls to the bottom of the furnace
where the temperature is approximately 2000 °C.
Iron is liquid at this temperature and is tapped off periodically.
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