Ultrasonic leaching-extracting separation method for yttrium-rich rare earth mine

Abstract

The invention discloses an ultrasonic leaching-extracting separating method of enriched rare earth ore, which is characterized by the following: leaching enriched yttrium rare earth ore, leached liquid and extract in the same container; extracting group by group; separating; obtaining yttrium hydrochlorate or enriched sulfate material as residual phase and non-yttrium rare earth element hydrochlorate or enriched sulfate material as extracting phase.

Description

Technical field: [0001] The invention relates to a method for separating yttrium-rich rare earth ore, in particular to a method for separating yttrium-rich rare earth ore by using hydrochloric acid aqueous solution or sulfuric acid aqueous solution as the leaching liquid, naphthenic acid and kerosene as the extracting liquid, and belongs to the field of hydrometallurgy . Background technique: [0002] Yttrium (atomic number 39) and lanthanides (atomic number 57-71) coexist in nature, and their chemical properties are very similar, making it difficult to separate them. At present, the hydrometallurgical process for purifying yttrium mainly uses liquid-liquid extraction technology. [0003] At present, yttrium-rich rare earth ores (high-yttrium heavy rare earth type, medium-yttrium heavy rare earth type, etc.) are used as raw materials, and the separation methods of rare earth leaching and solvent extraction are usually used to obtain yttrium oxide products and corresponding ...

AI Technical Summary

Problems solved by technology

[0005] ①The separation process route is long, both leaching equipment and extraction equipment are required, and the production capacity of the equipment is low;

[0006] ②As the extraction proceeds, the non-yttrium rare earth element hydrochloride or sulfate enrichment is continuously transferred from the water phase to the extraction phase, which greatly reduces the concentration of rare earth element hydrochloride or sulfate in the water phase, thereby making The extraction rate slows down, and the content of non-yttrium rare earth element hydrochloride or sulfate enrichment in the obtained extract phase is low, and the content of the hydrochloride or sulfate enrichment of yttrium in the obtained raffinate phase also does not reach saturation concentration, In the separation process, the amount of material is large, and it is difficult to remove impurities and separate

Not only the comprehensive yield of separation is low, but also the amount of feed liquid to be processed in the subsequent refining process is very large. If clean production with zero discharge is to be achieved, the processing cost will be high, and environmental pollution will be aggravated if it is not treated;

[0007] ③ The leaching and extraction rate and efficiency in the existing separation process are low, and the economic and social benefits are not high

This method not only consumes a lot of energy, a large amount of residual acid cannot be recovered, the operation is complicated, the equipment loss is large, and it pollutes the environment and produces new "three wastes".

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