Extracting Iron

Question 1

What is the main iron ore

Answer 1

Haematite Fe2O3

Question 2

What is the reaction that occurs in the blast furnace

Answer 2

Reduction as there is the removal of oxygen

Question 3

What are the raw materials

Answer 3

• iron ore
• coke used for reducing the iron ore
• limestone takes away a impurities

Question 4

Step 1 in reducing iron ore

Answer 4

The coke burns and produces CO2

• C + O2 ——» CO2

Question 5

Step 2 of the reduction of iron ore

Answer 5

The CO2 then reacts with the unburnt coke to form carbon monoxide

• CO2 + C ——» 2CO

Question 6

Step 3 in the reduction of iron ore

Answer 6

The carbon monoxide the reduces the iron ore to iron

• 3CO + Fe2O3 ——> 3CO2 + 2Fe

Question 7

What is the main impurity

Answer 7

Sand, silicon dioxide

Question 8

Why is the limestone needed

Answer 8

The silicon dioxide would still be solid at 1500c and would stay mixed into the molten iron

Question 9

Step 1 or removing impurities

Answer 9

The limestone is decomposed by the heat into calcium oxide and CO2

• CaCO3 ——» CaO + CO2

Question 10

Step 2 in removing the impurities

Answer 10

The calcium oxide then reacts with the silicon dioxide to form calcium silicate or slag

• CaO + SiO2 ——» CaSiO3

Question 11

What is the cooled slag used for

Answer 11

• road building

- fertilisers