Explain the principle of zone refining method and show which metal can be refined by it.Answer the given question in brief.
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The principle of the method of zone refining is that - the impurities in molten type of state of metal has more solubility than in a solid state.
MECHANISM :
In one of the ends of a rod, a movable circular heater is attached. The molten part of the rod also begins moving along with the moving of the heater. By doing this, the metal which is pure comes out of the melt and the impurities goes to the molten part.
Gallium, Indium, Boron, Silicon can be refined by this process.
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