Extraction Of Iron

Question 1

Raw materials fed into the blast furnace

Answer 1

Coke»carbon
Iron ore»Hematite&raquo_space;Fe2O3
Limestone >CaCo3

Question 2

Reactions taking place in the blast furnace

Answer 2

1. C+O2—->CO2
2. C+CO2—->2CO
3. Fe2O3+3CO—>2Fe3 +3CO2
4. CaCO3—->CaO+CO2
5. Cao+Si2—->CaSiO2

Question 3

Why is molten iron obtained below slag

Answer 3

It is more denser than air

Question 4

Give one use of slag

Answer 4

Making roads

Question 5

What’s the purpose of adding limestone to the furnace

Answer 5

To remove impurities

Question 6

What acts as reducing agent in the furnace

Answer 6

Carbon monoxide

Question 7

Waste gases in the furnace

Answer 7

Carbon monoxide and dioxide
Oxides of nitrogen