A method for improving the quality of rare earth metal products

Abstract

The invention provides a method for improving the quality of a rare earth metal product and belongs to the technical field of rare earth electrolysis. An isolation layer is arranged in a graphite electrolytic cell, so that the problems that the graphite electrolytic cell is involved into a reaction, so that carbonized rare earth is generated, and the quality of the rare earth metal product is severely affected are prevented. By means of the method, a pollution source is effectively isolated from the product from the source; product pollution is reduced; the product quality is obviously improved; and added materials are environment-friendly materials, and no environmental pollution is caused in the using process.

Description

technical field [0001] The invention belongs to the technical field of rare earth electrolysis, in particular to a method for improving the quality of rare earth metal products. Background technique [0002] The preparation of rare earth metals and rare earth alloys by fluoride molten salt electrolysis of rare earth oxides is a high-temperature metallurgical process. The fluoride molten salt system is extremely corrosive at high temperatures, which is difficult for traditional refractories to withstand. From the perspective of corrosion resistance of materials and economic cost, graphite is generally used as the electrolytic cell body. When rare earth metals are prepared by fluoride system molten salt electrolysis, the graphite tank used is directly in contact with the electrolyte and participates in partial reactions. The carbon in the electrolytic tank enters the electrolyte through inclusion and dissolution, and the carbon in the electrolyte forms carbonization Rare eart...

AI Technical Summary

Problems solved by technology

[0003] At present, the ways to control the carbon content in metals generally include changing the configuration of the anode, controlling the electrolysis temperature, controlling the utilization rate of oxides, and controlling the feeding speed of raw materials; taking metal neodymium as an example, the carbon content in neodymium increases with the increase of temperature As the temperature rises below 1020°C, the carbon content in neodymium can be controlled at about 0.03%; as the utilization rate of oxides increases, the carbon content in neodymium also increases. When the utilization rate is lower than 105%, the carbon content in metal It can be controlled below 0.03%, but the control of these factors depends on the workers involved in the production process. The requirements for the workers involved in the production process are too high, and there are great uncontrollable factors, which reduces the enterprise's influence on the production process and product quality. controllability