Q. 45.0( 6 Votes )

What are the different methods for the refining of metals?

Answer :

The different methods of refining are -

i. Liquation –


The process of separating low melting metals from high melting impurities by providing temperature required for pure metal to flow down leaving behind impurities.


Examples: refining of tin and lead.


The diagram is shown below:



ii. Distillation – process where impure metal is heated to vaporise the low boiling metal leaving behind impurities and condensing the vapour to get pure metal.


Example: refining of zinc , cadmium, mercury



iii. Electrolytic refining – The process of electrolysis of metal-salt solution where pure metal is used as cathode and impure metal is used as anode.


Example – copper and silver are refined using this method.



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