A method for short process electrolytic production of aluminum-scandium alloy

By using a mixture of AlF3, Al2O3, Sc2O3, and NaF/KF as raw materials and a composite power supply mode in the aluminum-scandium alloy preparation process, the problems of uneven composition and high energy consumption in the preparation of aluminum-scandium alloys were solved, and efficient and stable aluminum-scandium alloy production was achieved.

CN122147452APending Publication Date: 2026-06-05ZHENGZHOU NON FERROUS METALS RES INST CO LTD OF CHALCO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHENGZHOU NON FERROUS METALS RES INST CO LTD OF CHALCO
Filing Date
2026-03-17
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing methods for preparing aluminum-scandium alloys suffer from problems such as long process, high energy consumption, low alloy yield, and uneven composition. In particular, during molten salt electrolysis, the utilization rate of raw materials is low, the current efficiency is not high, and some chloride systems may produce harmful gases.

Method used

A mixture containing AlF3, Al2O3, Sc2O3, NaF, and/or KF is heated and melted. By combining a composite power supply mode of background DC current and positive pulse current, the electrolyte composition and current parameters are controlled to achieve uniform deposition of aluminum-scandium alloy.

Benefits of technology

This method achieves uniform composition and excellent performance of aluminum-scandium alloys, significantly improves current efficiency and raw material yield, reduces energy consumption, and ensures the stability and continuity of the electrolysis process.

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Abstract

The application relates to a short-process method for preparing an aluminum-scandium alloy through electrolysis and belongs to the technical field of non-ferrous metal smelting. The method comprises the following steps: heating and melting a mixture containing AlF3, Al2O3, Sc2O3 and NaF and / or KF to obtain a molten electrolyte; taking carbonaceous material or inert material as an anode and taking graphite or corrosion-resistant material as a cathode; placing the anode and the cathode in the molten electrolyte; applying background direct current between the anode and the cathode while superimposing a forward pulse current; and making the molten electrolyte undergo electrolytic deposition under the joint action of the background direct current and the forward pulse current to precipitate an aluminum-scandium alloy on the cathode.
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