Extracting iron ppt.ppt
- 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? 1 2 3 4 5 6 7 8 9 10 I know nothing I am an expert How would you rate yourself when thinking about extraction of metals?
- 4. The Reactivity Series potassium sodium calcium magnesium aluminium zinc iron copper gold (carbon) Increasing reactivity Metals above carbon must be extracted using electrolysis. Metals below carbon can be extracted from the ore by reduction using carbon, coke, or charcoal. Gold and silver often do not need to be extracted. They occur native. The reactivity of a metal determines the method of extraction. lead silver
- 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
- 7. Reduction of iron ore carbon + oxygen carbon dioxide Carbon dioxide + carbon carbon monoxide Carbon monoxide + iron oxide iron + carbon dioxide
- 8. Removing impurities Calcium carbonate calcium oxide + carbon dioxide Calcium oxide + silicon dioxide calcium silicate This is called SLAG
- 9. 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
- 10. 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?