Blast Furnace

Question 0

The 4th starting material is “pumped” into the bottom of the blast furnace through…

Answer 0

Tuyères this gives us hot air as oxygen is pumped in.

Question 1

What are the 3 starting materials?

Answer 1

IRON ORE - iron (III) oxide, Fe2O3
CHARCOAL -Carbon, C
LIMESTONE -CaCo3 calcium carbonate

Question 2

Give the 2 reactions that are highly exothermic and Which Co is the reducing agent..

Answer 2

C(s) + O2(g) = Co2(g)

Co2(g) + C(s) =2Co(g)

Question 3

What is the overall word equation for the reaction in a blast furnace?

Answer 3

Iron (III) oxide + Carbon dioxide = iron + carbon dioxide

Question 4

Give the overall symbol equation for the reaction in a blast furnace..

Answer 4

Fe2O3(s) + 3Co(g) = 2Fe(s) + 3Co2(g)

Question 5

What is the most common type if iron ore?

Answer 5

Haematíte

Question 6

Why is hot air blown into the bottom of the blast furnace?

Answer 6

The hot air burns the carbon which gives out hear and is very exothermic

Question 7

The haematíte contains SiO2 as an impurity. The limestone is added to remove the SiO2. How does the limestone do this? (There are 2 equations!)

Answer 7

Calcium oxide is basic and it reacts to remove acidic impurities e.g. Silicon dioxide.
SiO2(s) +CaO(s) = CaSiO3(s)
OR
CaCO3(s) = CaO(s) + CO2(g)