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Major iron ores
Haematite (Fe2O3) & magnetite (Fe3O4)
Blast furnace reaction: coke
C(s) + O2(g) -> CO2(g)
CO2(g) + C(s) -> 2CO(g)
Blast furnace reaction: limestone
CaCO3(s) -> CaO(s) + CO2(g)
=>
CaC(l) + SiO2(l) -> CaSiO3(l)
CaO(l) + Al2O3(l) -> CaAl2O4(l)
=> SLAG
Blast furnace reaction: coke & iron ore
3Fe2O3(s) + CO(g) -> 2Fe3O4(s) + CO2(g)
Fe3O4(s) + CO(g) -> 3FeO(s) + CO2(g)
FeO(s) + CO(g) -> Fe(s) + CO2(g)
=> PIG IRON
Crude is converted to steel via...
basic oxygen process
In alloys...
at least one component must be metal
Most alloys are...
homogeneous
Alloying can...
make a metal harder, stronger and corrossion resistant
Steel is...
strong, hard and versatile
Iron is...
soft and corrodes easily
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