Improvements in Methods for the Reduction of Zirconium Chloride with Magnesium

Abstract

It is shown that gaseous zirconium chloride can be piped to a reactor containing magnesium and that the reaction salts can be repeatedly tapped to make room for more magnesium, in view of continuing the reduction. This permits using the crucible capacity more fully, with consequent reduction of the production cost.Experiments indicate that part of the magnesium used for the reduction of zirconium chloride can be replaced with sodium. The advantages and disadvantages of this proposition are discussed.Cast iron is a better crucible material than mild steel when used in contact with hot zirconium. A layer of zirconium carbide is formed by zirconium diffusion, which helps reduce iron contamination.