Lithium residue comprehensive recycling method

By treating lithium slag through graded processing and various beneficiation processes, the problem of low comprehensive utilization efficiency of lithium slag has been solved, and the efficient recovery and high-value utilization of valuable components such as lithium, tantalum, and niobium have been achieved, reducing energy consumption and costs.

CN117065916BActive Publication Date: 2026-07-14TIANQI LITHIUM CORP +1
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Patent Information

Application Number
CN202311038013.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-08-17
Publication Date
2026-07-14
Estimated Expiration
2043-08-17

AI Technical Summary

Technical Problem

Existing technologies have low comprehensive utilization efficiency for lithium slag, failing to effectively recover valuable components such as lithium, tantalum, and niobium, leading to resource waste and environmental pollution.

Method used

By employing steps such as classification, flotation, grinding, magnetic separation, and sulfur flotation, and through processes such as pulping, classification, lithium flotation, weak magnetic separation, strong magnetic separation, gravity separation, and sulfur flotation, lithium concentrate, tantalum-niobium concentrate, silicon-aluminum micro powder, and gypsum are recovered, achieving efficient and comprehensive utilization of lithium slag.

Benefits of technology

This method improves the recovery rate and grade of lithium, tantalum, and niobium in lithium slag, reduces grinding volume, saves energy, lowers processing costs, and realizes the high-value utilization of lithium slag.

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Abstract

The present application relates to the technical field of lithium residue treatment, and particularly relates to a comprehensive recycling method of lithium residue. The method comprises the following steps: performing pulp treatment on the lithium residue to obtain a suspension; performing grading treatment on the suspension to obtain coarse-grained lithium residue and fine-grained lithium residue; performing lithium flotation treatment on the coarse-grained lithium residue to obtain lithium concentrate and primary flotation tailings; performing grinding treatment on the primary flotation tailings to obtain grinding material; mixing the grinding material and the fine-grained lithium residue, and then performing weak magnetic separation treatment to obtain iron concentrate and tailings after weak magnetic separation; performing strong magnetic separation treatment on the tailings after weak magnetic separation to obtain weak magnetic material and tailings after strong magnetic separation; performing gravity separation treatment on the weak magnetic material to obtain tantalum-niobium concentrate and iron-rich material; and performing sulfur flotation treatment on the tailings after strong magnetic separation to obtain silicon-aluminum powder and gypsum. The present application provides a comprehensive recycling method of lithium residue, which recycles lithium concentrate and tantalum-niobium under grading treatment, and the products have high grade and recovery rate, and efficient comprehensive recycling of lithium residue is realized.
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