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Metals can be extracted using 4 main methods:
Electrolysis
Reduction with carbon
Reduction with a more reactive metal
Reacting with hydrogen

Metals are naturally found as ores. Ores are rocks with enough of a metal content to make
them economical to extract. Many ores are metal oxides or metal sulfides.…

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Tungsten carbide is deliberately manufactured sometimes because it is extremely hard,
but you can't extract pure tungsten from it.
Aluminium is too reactive to be extracted with carbon.

Aluminium:
Aluminium is extracted from its main ore bauxite (Al2O3) by electrolysis. Bauxite is
purified to make aluminium oxide.
Conditions:
Dissolved in…

Page 3

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It can be expensive to produce (electrolysis of salt solutions byproducts can be sold to
other industries)

Environmental and economical advantages and disadvantages of recycling scrap metals
instead of extract more:
Advantages:
There are a finite amount of ores, so recycling means that already processed ores can
be reused.
Saves…

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