Method for preparing aluminum-samarium interalloy through liquid-state cathode salt fusion electrolysis method

Abstract

The present invention provides a method for preparing an aluminum-samarium interalloy through fluoride fusion-electrolysis, wherein the problem of the method for preparing an aluminum-samarium interalloy through a salt fusion electrolysis method is solved. According to the method, SmF3-LiF is adopted as a salt fusion system, and Sm2O3 is added to the fused salt as an electrolyte; a tungsten rod with a diameter of 50-60 mm as a cathode, aluminum is adopted as a liquid-state cathode, and graphite is adopted as an anode; at a temperature of 750-900 DEG C and a cathode current density of 1-2 A / cm<2>, electrolysis is performed for 25-40 min, the aluminum-samarium interalloy is accumulated in the fused salt surface liquid-state cathode, the current efficiency can achieve more than or equal to 90% through combination of the partial aluminum reduction effect, and the samarium content in the aluminum-samarium interalloy can achieve more than or equal to 30%. According to the present invention, the method is practical, the problem that the divalent samarium ions and the trivalent samarium ions are subjected to reciprocated cycling so as to waste the current is effectively solved, and the interalloy of samarium is successfully obtained through the electrolysis method; the method has characteristics of high production efficiency, low fused salt inclusion, uniform composition, and extremely low production cost; and the method can further be used for preparation of other similar interalloys.

Description

technical field [0001] Type in here The present invention relates to a method for preparing an aluminum-samarium master alloy, specifically a method for preparing an aluminum-samarium master alloy by liquid cathodic molten salt electrolysis, which belongs to the technical field of molten salt electrolysis preparation. Background technique [0002] Here, the rare earth elements have the functions of refining and modifying the alloy structure, purifying the alloy liquid, improving the mechanical properties, the castability of the alloy, enhancing the creep performance of the alloy and the corrosion resistance of the alloy. Therefore, rare earth elements have been widely used as alloying elements in aluminum and aluminum alloy materials, and rare earth aluminum alloys have been widely researched and applied in wires, heat-resistant aluminum alloys, high-strength aluminum alloys, and ultra-light aluminum alloys. However, rare earth elements have high chemical activity, high melt...

AI Technical Summary

Problems solved by technology

[0005] Type here The purpose of the present invention is to provide a method for preparing aluminum samarium master alloy by molten salt electrolysis, which effectively solves the problem of empty current consumption in the reciprocating cycle of divalent and trivalent samarium ions in the electrolysis process, and successfully obtains samarium by electrolysis The master alloy; and the production efficiency is high, the molten salt has less inclusions, the composition is uniform, and the production cost is extremely low