Method for producing rare earth metals and alloys

Abstract

The invention relates to a method for producing rare earth metals or alloys. In a period of electrolysis time, an ampere-hour collecting system converts collected current values into ampere-hour values and transmits the ampere-hour values to a control system, the control system accumulates the ampere-hour values in the whole electrolysis period to form an electrolysis period accumulated value, thecontrol system calculates the feeding amount of the electrolysis period according to the coefficient relationship between the electrolysis period ampere-hour accumulated value and the feeding amountand instructs a feeding machine to conduct feeding in the next electrolysis period, the collecting, calculating and feeding steps are circularly and continuously conducted, and the metals or alloys are produced through electrolysis. According to the method, not only is the labor intensity of workers reduced, but also the product quality is improved, and production is stabilized; precise feeding inthe rare earth electrolysis process is really achieved, and feeding is conducted as needed; and the method is simple and low in maintenance rate in the operation and implementation process, the production efficiency is greatly improved, the production cost is greatly reduced, and a solid foundation is laid for achievement of industrialization and informatization of industries.

Description

technical field [0001] The application of the present invention belongs to the field of rare earth metallurgy, and specifically relates to a method for producing rare earth metals and alloys. Background technique [0002] During the electrolysis process of the rare earth fluoride molten salt electrolysis system, due to the volatilization and leakage of the molten salt, the participation of fluoride in the electrolysis and other reasons, the electrolyte will be lost and the proportion will be changed. When the amount of molten salt is reduced, it will lead to lower output and higher cost, and when the fluoride content is lower or higher, it will lead to lower product quality and higher production cost. Therefore, it is very important to ensure the stability of the electrolyte system. [0003] In the existing electrolysis process, the electrolyte, rare earth fluoride and lithium fluoride are added separately. Since the melting point of lithium fluoride is lower than that of t...

AI Technical Summary

Problems solved by technology

[0012] This application overcomes the problem that the existing feeding method in this industry cannot accurately control the amount of materials required in the electrolytic cell for a long time, and cannot supply on demand, which seriously affects the quality of the product, leads to unstable production, and increases the production cost.