A method for recovering rare earth fluorides from rare earth waste electrode recycling materials and slag

Abstract

The invention discloses a method for recovering rare earth fluoride from an electrode scrap reclaimed material and slag of rare earth. The electrode scrap reclaimed material and the slag of the rare earth are taken as raw materials, the massive raw materials are sieved, non-rare-earth impurity blocks are removed, and the materials are subjected to sieving, ball milling and magnetic separation; the materials with most iron removed after magnetic separation are mixed with lithium fluoride; the mixture is heated to be melted until a melted liquid reaches a sufficient liquid level; the melted liquid is stirred and subjected to slag removal through filtering; a filtrate after slag removal is subjected to electrolytic impurity removal, slag is fished after an anode effect occurs in electrolysis, and a supernatant is subjected to cyclic electrolysis; the obtained supernatant is detected and is weighed and packaged after reaching the standard, and the final recovery product is obtained. Rare earth fluoride can be extracted conveniently and effectively from the electrode scrap reclaimed material and the slag of the rare earth, resources are saved, pollution is reduced, and the method has the characteristics of simple process and low cost.

Description

technical field [0001] The invention relates to a rare earth smelting technology, in particular to a method for recovering rare earth fluorides from rare earth waste electrode recycling materials and slag. Background technique [0002] As a mineral resource, rare earth has serious environmental pollution and ecological damage in the mining process. Therefore, the recovery of rare earth from industrial waste containing rare earth elements is of great significance to the sustainable development of rare earth resources and environmental protection in my country. . Since the rapid development of rare earth permanent magnet materials in the 1990s, downstream wind power, motors, and electric vehicles as rare earth permanent magnet products have developed rapidly, resulting in a huge demand for high-performance magnets represented by rare earth permanent magnets, thus creating This has led to the rapid development of the industry of rare earth metals, which are the main raw materia...

AI Technical Summary

Problems solved by technology

At the same time, the waste is mainly fluorinated rare earths. Fluorides are extremely stable and difficult to handle. The price of treatment is high, and the yield is low. The equivalent recycling fee per ton is as high as 85,000 yuan.

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