Question

Explain zone refining.

Answer 1

Zone Refining is the most important of the zone-melting techniques. In zone refining by passing a number of molten zones through it in one direction. Each zone carries a fraction of the impurities to the end of the solid charge thereby purifying the remainder.

Principle of Zone Refining are quite general and so the method has been applied to many substances. More than $1/3^{rd}$ of the elements and hundreds of inorganic & organic compounds have been raised to their highest purity by zone refining. Many of these were, for the first time made pure enough for their intrinsic properties to be determined.