METHOD FOR PRODUCING ALUMINIUM-SCANDIUM ALLOY AND REACTOR FOR IMPLEMENTING THE METHOD

摘要

The invention relates to nonferrous metallurgy and can be used for producing an aluminium-scandium alloy comprising 0.41-4 wt% of scandium in industrial production setting. The proposed method is implemented by melting together aluminium and a salt mixture comprising sodium, potassium and aluminium fluorides followed by performing simultaneously, while continuously feeding scandium oxide, an aluminothermic reduction of scandium from its oxide and an electrolytic decomposition of the alumina formed, wherein the concentration of the scandium oxide in the salt mixture melt is maintained in the range of 1 to 8 wt%. Periodically, at least part of the alloy produced is tapped and the aluminium is then charged, and the process of alloy production is continued while feeding scandium oxide. Also proposed is a reactor for producing an aluminium-scandium alloy by the method disclosed. The method makes it possible to produce the aluminium-scandium alloy with a predetermined composition, and ensures a high purity of the final product and a high level of scandium recovery while reducing the production process temperature and energy consumption.