A method and system for efficient and synergistic extraction of lithium, rubidium and cesium based on lithium mica

By combining low-temperature roasting and staged acid leaching with composite additives and calcium salt fixation technology, the problems of low extraction efficiency, high energy consumption, and high pollution of lithium, rubidium, and cesium in lepidolite have been solved, achieving efficient and environmentally friendly extraction of lithium, rubidium, and cesium and resource utilization of waste residue.

CN120796739BActive Publication Date: 2026-01-27YIFENG JIULING LITHIUM IND CO LTD
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Patent Information

Application Number
CN202511025239.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-07-24
Publication Date
2026-01-27
Estimated Expiration
2045-07-24

AI Technical Summary

Technical Problem

Existing lithium extraction processes from lepidolite involve low efficiency, high energy consumption, and significant pollution from the synergistic extraction of lithium, rubidium, and cesium. Furthermore, the processes are lengthy, leading to resource waste and severe environmental pollution.

Method used

Low-temperature roasting combined with composite additives is used to destroy the structure of lepidolite, and lithium, rubidium, and cesium are extracted in stages by acid leaching. Fluorine ions are fixed by calcium salts, and rubidium and cesium are separated by adsorption using composite ion sieves. This forms a short-process clean process that achieves efficient extraction of lithium, rubidium, and cesium and resource utilization of waste residue.

Benefits of technology

It achieves a high efficiency of over 95% in the staged leaching of lithium, rubidium, and cesium, significantly reducing energy consumption and environmental pollution, and forming a closed-loop recycling system with dual advantages of environmental protection and economy.

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Abstract

The application provides a lithium, rubidium and cesium efficient and synergic extraction method and system based on lepidolite, and relates to the technical field of mineral metallurgy.A lithium, rubidium and cesium efficient and synergic extraction method based on lepidolite comprises the following steps: S100, raw material preparation, crushing lepidolite ore and uniformly mixing the crushed lepidolite ore with a composite additive to obtain mixed raw materials; and S200, low-temperature roasting, roasting and treating the mixed raw materials in a rotary kiln to make the lepidolite layer structure disintegrate.A lithium, rubidium and cesium efficient and synergic extraction system based on lepidolite is used for the extraction and treatment of lithium, rubidium and cesium in the lithium, rubidium and cesium efficient and synergic extraction method based on lepidolite.The scheme finally realizes the optimization of the mineral crystal structure damage mechanism through the composite additive, the realization of the lithium efficient leaching, the rubidium and cesium strengthened extraction and the synchronous fixation of fluorine and silicon harmful elements through the gradient leaching and in-situ impurity control technology, and finally forms a closed-loop circulation system of lithium, rubidium and cesium high-value recovery and waste residue resource utilization.
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Citation Information

Patent Citations

  • Method for extracting cesium and rubidium from lepidolite

    CN111996392A

  • Method and device for extracting lithium from lithium mica

    CN101892394A

  • Method for extracting lithium and other alkali metal elements from lepidolite mineral

    CN101974678A