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What is electro-refining?
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Electrorefining is a process in which materials, usually metals, are purified by means of an electrolytic cell. ... An electric current is passed between a sample of the impure metal and a cathode when both are immersed in a solution containing cations of the metal.
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In this process the impure metal is made the anode and a thin strip of pure metal is made the cathode .
A solution of the metal salt is used as an electrolyt.
On passing the current through the electrolyt the pure metal from anode dissolve into the electrolyt.
An equivalent amount of pure metal from the electrolyt is deposited on the cathode.
The soluble impurities go into the solution and insoluble impurities settle down at the bottom of the anode and are known as ANODE MUD.
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