Lanthanum cerium-magnesium intermediate alloy and production method thereof

Abstract

The invention discloses a lanthanum cerium-magnesium intermediate alloy and a production method thereof, relating to the technical field of preparation of a rare earth-magnesium intermediate alloy product. According to the production method, a coelectrodeposition method is adopted, a graphite crucible is used as an electrolytic tank and an anode, a molybdenum bar is used as a cathode, a magnesium oxide crucible is used as an alloy supporting device, an electrolyte is formed by mixing KCl, anhydrous MgCl2 and RECl3 together. By adopting the preparation method disclosed by the invention, the lanthanum cerium-magnesium intermediate alloy high in quality and low in cost can be produced through one step by adopting magnesium and rare earth compounds through the coelectrodeposition method. The process indicators of the whole production process are relatively high, wherein the average electric efficiency reaches 65-75% and more than 85% at the maximum, the rare earth direct yield is more than 85%, and the magnesium direct yield is more than 95%. The lanthanum cerium-magnesium intermediate alloy prepared by the invention is lowest in price, and resources can be continuously supplied to promote sustainable development of rare earth-magnesium alloys.

Description

technical field [0001] The invention relates to the technical field of preparation of a rare earth magnesium master alloy product. Background technique [0002] Recognized at home and abroad, rare earths are the most effective and promising alloying elements to improve the comprehensive performance of magnesium alloys. However, many scientists worry that rare earths are too expensive to be used, and they are also worried about the sustainable supply of rare earths. [0003] Over the years, the bottleneck problem in the development of the rare earth industry is the unbalanced production and sales of rare earth elements, namely: praseodymium and neodymium in light rare earths are in short supply and the price is high, about 250,000 yuan per ton of metal, while the production of one ton of metal neodymium or praseodymium costs about 4 tons of lanthanum and cerium residues are produced, and the price of each ton of lanthanum and cerium metal is about 30,000 yuan, resulting in a ...

AI Technical Summary

Problems solved by technology

[0003] Over the years, the bottleneck problem in the development of the rare earth industry is the unbalanced production and sales of rare earth elements, namely: praseodymium and neodymium in light rare earths are in short supply and the price is high, about 250,000 yuan per ton of metal, while producing one ton of metal neodymium or praseodymium costs about 4 tons of lanthanum and cerium residues are produced, and the price of each ton of lanthanum and cerium metal is about 30,000 yuan, resulting in a large backlog of lanthanum and cerium, which urgently needs to be developed and applied

The magnesium alloy market needs high-quality lanthanum-cerium-magnesium master alloys. The content of impurities such as Fe in lanthanum-cerium metals currently available in the market is relatively high (<0.5%), and the impurity content of the master alloy obtained by the doping method does not meet the requirements; and the doping method does not meet the requirements. It is first to make rare earth metal and metal magnesium, and then mix and melt the two. The production process consumes more materials and energy.