FIELD: metallurgy.
SUBSTANCE: invention relates to metallurgy, in particular to the production of zirconium from its oxide by electrolysis of molten salts. The method includes the reduction of ZrO2 to metallic zirconium during the electrolysis of molten salts at a temperature of 650 to 850°C. As the molten salt using a mixture of salts, wt. %: (20-60)KF - (up to 47.5)NaF - (30-50)AlF3 - (0.5-2.5)ZrO2. Electrolysis is carried out in an air atmosphere at a cathode potential of 0.05 V more positive than the potential of the aluminum reference electrode, and graphite is used as the cathode. As a result of electrolysis on the cathode, metallic zirconium with an admixture of aluminum up to 0.6 wt. % when using its oxide as a source of zirconium.
EFFECT: method allows to increase the rate of obtaining zirconium, to simplify the separation of the obtained zirconium from salt residues and unreduced oxides.
1 cl, 2 dwg
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