Device for separating lithium and ternary metal ions M from lithium solution

Abstract

The invention provides a device for separating lithium and ternary metal ions M from a lithium solution. The device comprises a device body, and the device body is provided with a plurality of feed ports, an overflow port located in the side wall of the upper end of the device body and a discharge port located in the bottom of the device body; the stirring device is connected with the device body in a sealing manner and is used for stirring in the device body; the temperature control device wraps the outer side of the device body and is used for heating or cooling the device body; the device for separating the lithium and the ternary metal ions M from the lithium solution is used for enabling the ternary metal ions M in the lithium solution to form spherical hydroxide precipitates, and enabling the lithium in the lithium solution to be separated from the ternary metal ions M to obtain mother liquor. Compared with the prior art, the device is simple in structure, and production cost and operation requirements are reduced.

Description

technical field [0001] The invention belongs to the field of new energy materials, and in particular relates to a device for separating lithium and ternary metal ions M from a lithium solution. Background technique [0002] Lithium-ion batteries have developed rapidly in the battery market due to their special energy storage properties. However, as lithium batteries are used in charge and discharge cycles, they need to be recycled after their lifespan expires. At present, the general steps of recycling waste lithium-ion batteries are disassembly, screening, crushing and extraction, and the crushed cathode powder is then subjected to wet or fire processing to obtain the desired product. The advantage of wet treatment is that the recovery rate is high, up to about 90%, but the treatment process is complicated and the treatment cost is relatively large. In the wet recovery process, lithium is usually extracted last. Generally, after the extraction of cobalt, manganese, nickel ...

AI Technical Summary

Problems solved by technology

The advantage of wet treatment is that the recovery rate is high, which can reach about 90%, but the treatment process is complicated and the treatment cost is relatively high

And in the wet recovery process, lithium can usually be extracted last. Generally, after extracting metal ions such as cobalt, manganese, and nickel, most of the remaining lithium elements are in the raffinate, because the lithium content in the raffinate is low at this time. (Generally 1.5~2.0g / L), making it more difficult to enrich again, the recovery cost is high by means of evaporation, concentration and crystallization, and it is often not recovered, and the tail water is discharged after treatment, causing environmental pollution and waste of resources

The fire method refers to adding the positive electrode powder to the slagging agent and then melting the slag at a high temperature above 1300°C to separate valuable metals. Although the fire method has a large amount of treatment and a simple process, the recovery rate of lithium is very low. The current industry basically no use

[0003] Therefore, in addition to the extraction method, how to separate lithium and ternary metal ions M (nickel, cobalt, manganese, aluminum, etc.) The efficient separation of ions M, further and how to realize lithium recovery from the source of battery waste and low content (generally 1.5~2.0g / L) lithium recovery related technologies and recovery devices have not yet been reported.

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