C1a rocks and metals
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C1a Rocks and Metals. 2.2 Extracting Iron. Learning objectives. Understand which metals can be extracted using carbon Be able to describe how a blast furnace works. What do you understand?. How would you rate yourself when thinking about extraction of metals?.

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C1a Rocks and Metals

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C1a rocks and metals

C1a Rocks and Metals

2.2 Extracting Iron


Learning objectives

Learning objectives

  • Understand which metals can be extracted using carbon

  • Be able to describe how a blast furnace works


What do you understand

What do you understand?

  • How would you rate yourself when thinking about extraction of metals?


C1a rocks and metals

The reactivity of a metal determines the method of extraction.

The Reactivity

Series

potassium

Increasing reactivity

sodium

Metals above carbon must be extracted using electrolysis.

calcium

magnesium

aluminium

(carbon)

zinc

Metals below carbon

can be extracted from the ore by reduction using carbon, coke, or charcoal.

iron

lead

copper

silver

Gold and silver often do not need to

be extracted. They occur native.

gold


Iron age

Iron age

  • Iron – 2nd most common metal in the Earth’s crust

  • Found as haematite

    • Iron (III) oxide (Fe2O3)

    • Sand

  • Can be obtained using a blast furnace


Reduction of iron ore

Reduction of iron ore

carbon + oxygen  carbon dioxide

Carbon dioxide + carbon  carbon monoxide

Carbon monoxide + iron oxide  iron + carbon dioxide


Removing impurities

Removing impurities

Calcium carbonate  calcium oxide + carbon dioxide

Calcium oxide + silicon dioxide  calcium silicate

This is called SLAG


Summary of the process

Summary of the process

  • Iron is not found naturally, but in Iron Ore

  • We can extract iron form iron ore using a Blast Furnace

  • Using chemistry we can produce pure iron

  • Limestone (CaCO3) is used to remove impurities

  • Coke/Carbon gives us the high temperature we need for the reactions to take place


Learning outcomes

Learning outcomes

  • Why can some metals be extracted using carbon when some can’t?

  • What do we use to extract iron?

  • How does a blast furnace work?

  • What chemical reactions take place?


Extraction of iron

Extraction of Iron


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