Extraction of Iron

Question 1

Iron ore

Answer 1

Haematite (Fe2O3)

Question 2

Ingredients for Iron Extraction

Answer 2

Coke (Carbon): C
Limestone: CaCO3 or Calcium Carbonate
Oxygen: O2

Question 3

1st step of Iron Extraction

Answer 3

Haematite’s crushed & mixed with Carbon & Limestone before transferred into blast furnace

C + 02 -> CO2 (Carbon binds with oxygen to form Carbon Dioxide)

CaCO3 -> CaO + CO2 (Limestone decomposes to form Calcium oxide & Carbon dioxide)

CO2 + C -> 2CO (Carbon Dioxide binds with Carbon to form 2 Carbon monoxide)

Question 4

2nd step of Iron Extraction

Answer 4

Carbon Monoxide reduces Iron Oxide from Haematite to Iron

Fe2O3 + 3CO -> 2Fe + 3CO2

Question 5

3rd step of Iron Extraction

Answer 5

Calcium Oxide reacts with impurities (acidic oxides) like silica to form slag (roads & cement)

CaO + SiO2 -> CaSiO3 + CO2