A method for comprehensive recovery of lithium element from lithium aluminosilicate impurity residue

By using ultrasonic treatment and modification processes, lithium can be recovered from the impurity slag of spodumene, solving the problem of low lithium recovery efficiency in the process of preparing lithium carbonate from spodumene, and achieving efficient recovery and high-value-added conversion of waste.

CN122126866APending Publication Date: 2026-06-02FENGCHENG JIULING LITHIUM IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FENGCHENG JIULING LITHIUM IND CO LTD
Filing Date
2026-03-18
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In existing technologies, the lithium recovery efficiency of the primary impurity removal slag in the process of preparing lithium carbonate from spodumene is low, and the treatment method poses a potential threat to the environment.

Method used

An ultrasonic treatment device was used to remove impurities from spodumene brine and mix it with deionized water. The cavitation effect of ultrasound was used to promote the dissolution and separation of lithium hydroxide. Lithium hydroxide crystals were obtained by evaporation concentration and cooling crystallization. The filter residue was dried and modified and flame retardant synergists were added to prepare a composite flame retardant.

Benefits of technology

This significantly improves the recovery efficiency of lithium, enabling efficient recovery of lithium from spodumene brine slag after a single impurity removal process. It also allows for the preparation of a high-performance composite flame retardant, creating economic value and reducing environmental impact.

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Abstract

This invention provides a method for the comprehensive recovery of lithium from spodumene impurity removal slag, relating to the field of solid waste lithium extraction technology. The method includes the following steps: Step S1, material pretreatment, weighing and mixing spodumene brine primary impurity removal slag with deionized water at a solid-liquid ratio of 1:3-4 to obtain a mixture; Step S2, vibration reaction, placing the slurry mixture into an ultrasonic treatment device for reaction, controlling the ultrasonic frequency at 45-60kHz, utilizing the cavitation effect of ultrasound to promote the dissolution and separation of lithium hydroxide, filtering to obtain filtrate A containing lithium hydroxide and filter residue A; Step S3, evaporation and concentration; Step S4, cooling and crystallization. Utilizing the cavitation effect of ultrasound to enhance the dissolution process of lithium hydroxide significantly improves the lithium recovery efficiency compared to traditional water washing methods; it can effectively recover lithium from spodumene brine primary impurity removal slag, possessing high practical value and economic and social benefits.
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