Preparation method of low-oxygen high-purity rare earth alloy

Abstract

The invention belongs to the field of rare earth alloy preparation, and particularly provides a preparation method of a low-oxygen high-purity rare earth alloy. High-purity rare earth oxides or chlorides serve as raw materials to be electrolyzed in a fused salt system. Graphite serves as an anode, and an alloy element self-consuming rod serves as a cathode. In the electrolyzing process, the cathode self-consumes, a rare earth alloy is generated through mutual diffusion of the cathode and separated rare earth metal, the rare earth alloy is collected at the bottom of an electrolytic cell, a casting device is adopted for regularly taking the rare earth alloy out of a crucible, when a casting tank is filled with rare earth alloy melt, the casting tank is lifted, a liquid injection pipe and anair exhaust / inflation pipe at the two ends of the casting tank are rapidly sealed, the casting tank is taken down, and then the low-oxygen high-purity rare earth alloy is prepared in the casting tank.The preparation method is easy to operate, the prepared rare earth alloy is low in oxygen content, high in purity, short in technological process, high in yield and low in cost, and the problem aboutpreparation of the low-oxygen high-purity rare earth alloy can be solved fundamentally.

Description

technical field [0001] The invention belongs to the field of rare earth alloy preparation, in particular to a method for preparing a low-oxygen high-purity rare earth alloy. Background technique [0002] Rare earth elements have a series of special properties and are widely used, especially in the fields of high-tech, new material preparation, and new energy. Rare earth elements are indispensable. Adding rare earth elements can significantly improve the strength, heat resistance, wear resistance, and corrosion resistance of materials. and its processing performance. In addition, the addition of rare earth can make the material have special optical, electrical, magnetic, thermal and other properties. [0003] The biggest problem in the application of rare earths in materials is that the rare earth alloys used as additives in the material preparation process have high oxygen content and low purity. In addition, low-oxygen high-purity rare earth alloys are easily re-oxidized a...

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Problems solved by technology

However, the existing methods still cannot meet the requirements for preparing low-oxygen high-purity rare earth alloys. The various rare earth alloys produced by various methods either have high oxygen content and low purity, or are not properly packaged, transported, stored and used. Strict oxygen control is carried out, and the rare earth alloy finally added to the material has high oxygen content and low purity, which cannot meet the requirements of high-performance material manufacturing

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