Zone Melting: This technique offers unique advantages in purification and in control of composition in various substances.
So far, most work in the field of zone melting has been done on a small scale, use of heavier than 100-pound ingots of certain metals notwithstanding. However, there is no basic reason why tons rather than pounds cannot be treated. Continuous refiners have been designed and operated, and a suitable design theory exists (3).
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