Blast Furnace Flashcards
1
Q
iron ore
A
hematite
2
Q
blast furnace reactions
A
- carbon (coke) burns, releasing heat and it reacts with oxygen
- carbon dioxide is reduced to carbon monoxide
- iron (iii) oxide is reduced by carbon
- thermal decomposition of calcium carbonate
- formation of slag
3
Q
coke is oxidised
A
carbon + oxygen –> carbon dioxide
C + O2 –> CO2
4
Q
carbon dioxide reduced
A
carbon dioxide + carbon –> carbon monoxide
CO2 + C –> 2CO
5
Q
iron (iii) oxide reduced
A
Iron (iii) oxide + carbon monoxide –> iron + carbon dioxide
Fe2O3 + 3CO –> 2Fe + 3CO2
6
Q
thermal decomposition of calcium carbonate (limestone) to calcium oxide
A
Calcium carbonate –> calcium oxide + carbon dioxide
CaCO3 –> CaO + CO2
7
Q
formation of slag (CaO reacts with sand)
A
calcium oxide + silica –> calcium silicate
CaO + SiO2 –> CaSiO3
8
Q
aluminium ore
A
bauxite (extracted by electrolisis)
