L11. Extraction of iron

• Chem
• Secondary Education

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Before we begin:

Lesson 11

Extraction of IRON

07-10-2022

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• describe the extraction of iron from a rock called hematite
• using equations, summarise each step in the extraction of iron from hematite

Success Criteria

Language 

development

• blast furnace
• hematite
• limestone
• mineral
• slag

Know the keywords

Important Keywords and Concepts

• Individual; written
• Do the important keywords activity. 
• You only have 7 minutes.
• Checking!

Iron is extracted in a large container called a ____________ from its ore.

1. blast furnace
2. fume furnace
3. welding box
4. electrolysis hood

The mineral ore where iron is extracted is called ___________.

1. bauxite
2. hematite
3. limestone
4. quartz

Modern blast furnaces produce approximately ____________ tonnes of iron per day.

1. 1000
2. 10000
3. 100
4. 100000

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2

3

4

5

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7

The raw materials: iron ore (hematite), coke (an impure form of carbon), and limestone are added into the top of the blast furnace.

Hot air is blown into the bottom

Coke burns in the hot air forming carbon dioxide.

At the high temperatures in the furnace, more coke reacts with carbon dioxide forming carbon monoxide

Carbon monoxide reduces the iron(III) oxide in the iron ore to form iron

Limestone (calcium carbonate) is added to the furnace to remove impurities in the ore.

The calcium oxide formed reacts with the silicon dioxide, which is an impurity in the iron ore, to form calcium silicate

Carbon dioxide has been _____________ to carbon monoxide.

1. reduced
2. oxidised
3. burned

The calcium carbonate in the limestone thermally decomposes to form _____________.

1. carbon monoxide
2. calcium silicate
3. calcium oxide

When calcium oxide formed reacts with the silicon dioxide, it melts and collects as a molten 'slag' floating on top of the molten iron, which is tapped off separately. What is a slag?

1. carbon monoxide
2. calcium silicate
3. calcium oxide

carbon + carbon dioxide → carbon monoxide

The word equation above happens in what zone of the blast furnace?

1. zone 3
2. zone 2
3. zone 1

calcium oxide + silicon dioxide → calcium silicate

The word equation above happens in what zone of the blast furnace?

1. zone 3
2. zone 2
3. zone 1

iron(III) oxide + carbon monoxide → iron + carbon dioxide
The word equation above happens in what zone of the blast furnace?

1. zone 3
2. zone 2
3. zone 1

carbon + oxygen → carbon dioxide

The word equation above happens in what zone of the blast furnace?

1. zone 3
2. zone 2
3. zone 1

calcium carbonate → calcium oxide + carbon dioxide
The word equation above happens in what zone of the blast furnace?

1. zone 3
2. zone 2
3. zone 1

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3

2

4

5

The burning of carbon (coke) to provide heat and produce carbon dioxide:

The reduction of carbon dioxide to carbon monoxide

The reduction of iron(III) oxide by carbon monoxide

The thermal decomposition of calcium carbonate (limestone) to produce calcium oxide.

The formation of slag.

Self - Evaluation
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😅 - I am getting there! I need a bit of help. I am a bit unsure. I might need to practice.
😬 - I need help! I don't understand this. I am not ready to move on yet.

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• Tuesday - End of chapter 15 test 3

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