The invention belongs to the technical field of
molten salt electrolysis, and in particular relates to a
molten salt electrolysis method for preparing an aluminum-
scandium intermediate
alloy. The
molten salt electrolysis method comprises the following steps: in a point charging type pre-baked
anode molten salt electrolytic tank, by taking
fluoride molten salt M3AlF6-AlF3 as a basic
electrolyte system and taking aluminum
oxide and a
scandium-containing compound as raw materials, performing electrolysis in different
cathode regions in the same electrolytic tank to dissolve out
metal aluminum and
metal scandium by adopting an independent charging mode, and alloying
metal aluminum and metal scandium to obtain an aluminum-scandium intermediate
alloy product of which the scandium content is 1.5-3.0% and the total
mass percentage of aluminum and scandium is more than 99%. The aluminum-scandium intermediate
alloy prepared by using the method disclosed by the invention is adjustable in component proportion, is suitable for additives of various scandium-containing aluminum alloys and other alloys, and ensures that the mechanical performance of the alloys can be significantly improved and the problems that aluminum
oxide or the scandium-containing compound at the tank bottom is easy to participate and the electrolytic tank cannot be operated stably for a long time can be solved; and the method disclosed by the invention is low in production cost, high in
automation degree and high in production efficiency.