FIELD: nonferrous metallurgy. SUBSTANCE: invention relates to preparing high-purity magnesium alloy in which alloy-forming components are added to molten magnesium in molten state. Predetermined quantity of primary magnesium is heated and melted in bowl. In the second one, predetermined quantities of alloying metals are heated to their melting temperatures. Molten alloying metals are added to molten magnesium to immediately form alloy as a result of exothermic reaction. Elementary manganese, when preliminarily added to alloy with other alloying elements, proved to reliably reduce iron impurity content to the level less than 50 ppm. Addition of molten manganese alloy with one or several rare-earth metals to magnesium alloy prevents rare-earth metals from precipitation out of melt and raises assimilation degree of rare-earth metal to the level exceeding 80%. EFFECT: enhanced efficiency of process, reduced power consumption, and excluded formation of sodium chloride slag and gaseous hydrogen chloride.
