Method for preparing rare earth magnesium alloy and yttrium-neodymium magnesium alloy

Abstract

The invention relates to a method for preparing yttrium-neodymium magnesium alloy and the yttrium-neodymium magnesium alloy. A graphite block is adopted as an anode, a molybdenum rod serves as an inertia cathode, a molybdenum crucible serves as an alloy receiver, mixtures of yttrium oxide, neodymium oxide and magnesium oxide are added into a fluoride molten salt electrolyte system composed of yttrium fluoride, neodymium fluoride and lithium fluoride, then direct currents are guided for electrolysis and finally the yttrium-neodymium magnesium alloy is obtained; the mass ratio of the yttrium fluoride to the neodymium fluoride to the lithium fluoride in the fluoride molten salt electrolyte system is 5-20 to 70-90 to 5-10, the mass percent ratio of the neodymium oxide and the yttrium oxide to the magnesium oxide is 99-80 to 1-20, the mass percent ratio of the neodymium oxide to the yttrium oxide is 99-1 to 1-99, and the electrolysis temperature ranges from 1050 DEG C to 1150 DEG C. The method has the advantages that the technological process is simple, the cost is low, the product ingredients are stable, just carbon dioxide and little carbon monoxide are generated in the technological process, environmental pollution is small, and the process is friendly to environment and is suitable for large-scale production.

Description

Technical field [0001] The present invention involves a preparation method of rare earthy magnesium alloy and rare earth magnesium alloy, which belongs to the field of rare earth fire metallurgy. Background technique [0002] The preparation methods of rare earth alloys at high melting points are mainly to mix, heat repayment method, and melting salt electrolysis method.Compared with the previous two methods, the molten salt electrolysis method has a reducing agent and complex equipment that does not need to prepare a single soil metal, and does not require high cost, low cost, uniform ingredients and easy to control, good quality, easy to achieve continuous productionWait for many advantages. [0003] However, the preparation method of rare earth magnesium alloy is mainly to mix, that is, the rare earth metal or alloy with metal magnesium made with the above methods melts under vacuum and certain temperature conditions, so that various metal alloys are made to make rare earth ma...

AI Technical Summary

Problems solved by technology

[0007] The above method for preparing rare earth magnesium master alloy is the self-consumable cathode method. Although this method has the advantages of less investment, low production cost, simple production process, and continuous large-scale production compared with the mixed method, it also has the advantages of partitioning in the alloy. The fluctuation is large, and the distribution error is as high as 3%-5%, which affects the consistency of the product

Serious slag formation in the electrolysis process leads to increased production costs, frequent replacement of cathodes during production, and high labor intensity.

The method of preparing single metal yttrium and neodymium and yttrium-magnesium alloy has also been published, but the method of directly preparing yttrium-neodymium-magnesium alloy by electrolysis has not yet been published