Composite fluorine removal agent and fluorine reduction method of composite fluorine removal agent in ionic rare earth concentrate

By leveraging the synergistic effect of composite defluorinating agents in an acid-soluble system, the problems of high energy consumption and high cost in existing rare earth defluorination technologies have been solved, realizing an efficient and low-cost method for defluorinating rare earth concentrates and improving the stability of rare earth extraction processes.

CN121759693AActive Publication Date: 2026-03-31JIANGHUA COUNTY XINGHUA RARE EARTHS NEW MATERIAL CO LTD
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Patent Information

Application Number
CN202511852905.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-10
Publication Date
2026-03-31
Estimated Expiration
2045-12-10

AI Technical Summary

Technical Problem

Existing rare earth defluorination technologies involve long processes, numerous steps, high energy consumption, and high costs, making it difficult to meet the needs of green and efficient rare earth processing. Furthermore, the generation of three-phase substances during the extraction and separation process affects the extraction efficiency.

Method used

A composite defluorinating agent is used, which is composed of iron salts, calcium salts, sodium salts, and lanthanum and cerium compounds in a specific ratio. Through synergistic effects, it directly achieves efficient defluorination in an acid-soluble system, including heat treatment and flocculation steps.

Benefits of technology

It significantly improves defluorination efficiency, reduces the generation of three-phase substances, lowers energy consumption and production costs, improves phase separation performance, and enhances the stability of rare earth extraction processes.

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Abstract

The invention relates to the technical field of rare earth impurity removal, in particular to a composite fluorine removal agent and a fluorine reduction method of the composite fluorine removal agent in ionic rare earth concentrate, and the composite fluorine removal agent comprises the following components in percentage by weight: 15-25% of ferric salt, 20-35% of calcium salt, 20-30% of sodium salt, 15-20% of lanthanum compound and 15-20% of cerium compound. According to the method, the iron salt, the calcium salt, the sodium salt, the lanthanum compound and the cerium compound have a synergistic effect, so that the defluorination efficiency can be remarkably improved, the generation of three-phase substances in the subsequent extraction and separation process is reduced, efficient defluorination can be directly realized in an acid-soluble system, and the energy consumption and the production cost are reduced.
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