extraction of iron Flashcards
1
Q
what are the materials added to furnace
A
- Iron ore (hematite)
- Coke (impure carbon)
- limestone
2
Q
what is the purpose of limestone?
A
- react with silica in hematite -> produce slag
-> Produce calcium silica
CaO(s) + SiO2(s) → CaSiO3(l)
> > > This process is neutralisation
3
Q
what limestone used
A
calcium carbonate
-> but they thermally decompose to form calcium oxide
CaCO3(s) → CaO(s) + CO2(g)
calcium carbonate → calcium oxide + carbon dioxide
4
Q
what is the equation to make iron
A
Iron(III) oxide + carbon monoxide → iron + carbon dioxide
2Fe2O3(s) + 3CO(s) → 4Fe(l) + 3CO2(g)
5
Q
what happen to slag
A
-> tapped off separately
6
Q
what are zone 1
A
C (s) + O2 (g) → CO2 (g)
C from coke
6
Q
How many zones are there
A
3
7
Q
what are zone 2
A
CO2 (g) + C (s) → 2CO (g)
