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C1a Rocks and Metals

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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  1. C1a Rocks and Metals 2.2 Extracting Iron

  2. Learning objectives • Understand which metals can be extracted using carbon • Be able to describe how a blast furnace works

  3. What do you understand? • How would you rate yourself when thinking about extraction of metals?

  4. 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

  5. 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

  6. Reduction of iron ore carbon + oxygen  carbon dioxide Carbon dioxide + carbon  carbon monoxide Carbon monoxide + iron oxide  iron + carbon dioxide

  7. Removing impurities Calcium carbonate  calcium oxide + carbon dioxide Calcium oxide + silicon dioxide  calcium silicate This is called SLAG

  8. 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

  9. 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?

  10. Extraction of Iron

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