BLAST FURNACE

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Total cards: 23•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (23)

Front (Question)

What are the raw materials used in the blast furnace?

Back (Answer)

Hematite (iron ore) Coke (carbon) Limestone

Front (Question)

What is the purpose of the blast furnace?

Back (Answer)

Extraction of iron

Front (Question)

What is the word formula of hematite?

Back (Answer)

Iron (III) oxide

Front (Question)

What is the purpose of the coke?

Back (Answer)

Reducing iron oxide to iron metal

Front (Question)

What is the purpose of the limestone?

Back (Answer)

Take away impurities in the form of slag

Front (Question)

What is the temperature in the blast furnace?

Back (Answer)

1500 degrees

Front (Question)

What is the first reaction to take place in the blast furnace in the reduction of iron involving coke?

Back (Answer)

C + O2 –> CO2

Front (Question)

What is the second reaction to take place in the blast furnace in the reduction of iron involving the CO2 from the first reaction?

Back (Answer)

CO2 + C –> 2CO

Front (Question)

What is the second reaction to take place in the blast furnace involving the CO2 from the first reaction?

Back (Answer)

CO2 + C –> 2CO

#10

Front (Question)

What is the third reaction to take place in the blast furnace in the reduction of iron involving carbon monoxide from the second reaction?

Back (Answer)

3CO + Fe2O3 –> 2Fe + 3CO2

#11

Front (Question)

What is the useful component of hematite?

Back (Answer)

Iron (III) oxide

#12

Front (Question)

What type of reaction is the first reaction in the blast furnace? (C + O2 –> CO2)

Back (Answer)

Combustion reaction

#13

Front (Question)

What type of reaction is the third reaction in the blast furnace? (3CO + Fe2O3 –> 2Fe + 3CO2)

Back (Answer)

Redox reaction

#14

Front (Question)

What is the main impurity in hematite?

Back (Answer)

Silicon dioxide (sand)

#15

Front (Question)

What is the chemical formula of silicon dioxide?

Back (Answer)

SiO2

#16

Front (Question)

What is the chemical formula of limestone?

Back (Answer)

CaCO3

#17

Front (Question)

What is the first reaction in the blast furnace involved in the removal of impurities?

Back (Answer)

CaCO3 –> CaO + CO2

#18

Front (Question)

What is the second reaction in the blast furnace involved in the removal of impurities, involving the CaO from first reaction?

Back (Answer)

CaO + SiO2 –> CaSiO3

#19

Front (Question)

What type of reaction is the second reaction in the removal of impurities from the blast furnace?

Back (Answer)

Neutralisation reaction

#20

Front (Question)

What is the term we use for CaSiO3?

Back (Answer)

Molten slag

#21

Front (Question)

How do we get rid of the molten slag from the blast furnace?

Back (Answer)

We tap it off

#22

Front (Question)

Why can we tap off the molten slag?

Back (Answer)

Because it is less dense than the molten iron so will form the top layer.

#23

Front (Question)

Why do we need to remove the silicon dioxide from the iron?

Back (Answer)

Iron with silicon dioxide in it is brittle.