Method for comprehensively recycling valuable metals from spent lithium ion battery

A lithium-ion battery and valuable metal technology, which is applied in the smelting of valuable elements and the treatment of waste lithium-ion batteries, can solve the problems of not considering the side reaction between electrolyte and lithium and the volatilization environment, and simplify the pretreatment. , the effect of reducing the recovery rate and reducing the processing cost

Active Publication Date: 2017-08-04
GUANGDONG GUANGHUA SCI TECH
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  • Claims
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Problems solved by technology

However, the processing objects of the above methods are all lithium-ion battery cathode materials obtained after crushing and screening, and the environmental problems caused by side reactions and volatilization of the electrolyte and lithium are also not considered.

Method used

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  • Method for comprehensively recycling valuable metals from spent lithium ion battery

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Comparison scheme
Effect test

Embodiment 1

[0027] Step (1): Punch out 1000g of lithium cobaltate, nickel-cobalt-manganese ternary, nickel-cobalt-aluminum ternary battery waste and soak in CaO slurry for 24 hours, then remove the battery for crushing, and set a suction hood above the crusher , Collect the volatilized electrolyte waste gas and absorb it with CaO slurry. After filtration, the filtrate is combined with the subsequent carbonated water infusion, and the filter residue is stored.

[0028] Step (2): Put the crushed battery material into a muffle furnace, and pre-calcine at 350° C. for 1 hour. After that, the material was mixed with 80 g of lignite (60% carbon content), and then reduced and roasted at 600° C. for 2 hours. The flue gas produced in the pre-roasting and reduction roasting processes is absorbed and treated with CaO slurry.

[0029] Step (3): Sieve the reduced and roasted material with a vibrating screen with a mesh size of 1mm, immerse the fine material smaller than 1mm in carbonation water at ro...

Embodiment 2

[0035] Step (1): Punch 1000g of lithium cobaltate, nickel-cobalt-manganese ternary, nickel-cobalt-aluminum ternary battery waste and soak in MgO slurry for 24 hours, then remove the battery for crushing, and set a suction hood above the crusher , Collect the volatilized electrolyte waste gas and absorb it with CaO slurry. After filtration, the filtrate is combined with the subsequent carbonated water infusion, and the filter residue is stored.

[0036] Step (2): Put the crushed battery material into a muffle furnace, and pre-calcine at 320° C. for 2 hours. After that, the material was passed through H at 450°C 2 Reduction roasting 1.5h, H 2 The flow rate is 1L / min, and the flue gas produced in the pre-roasting and reduction roasting processes is absorbed and treated with CaO slurry.

[0037] Step (3): Sieve the reduced roasted material with a vibrating sieve with a mesh size of 1 mm, and immerse the fine material smaller than 1 mm in water at room temperature, with a liquid...

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Abstract

The invention discloses a method for comprehensively recycling valuable metals from a spent lithium ion battery. The method comprises the following steps: carrying out electric discharge treatment on a spent battery, crushing, pre-roasting at 300-400 DEG C, adding a reducing agent, and carrying out reduction roasting at 450-700 DEG C; carrying out water extraction and evaporative crystallization on fine aggregates obtained through the reduction roasting, so as to obtain a high-purity lithium product, leaching copper, nickel and cobalt from leached slag and roasted lump materials by virtue of ammonia oxide, carrying out magnetic separation and sieving on ammonia leaching slag so as to obtain iron and aluminum enriched products, and carrying out reduction acid leaching, purification and edulcoration on sieved products, so as to obtain a high-purity manganese sulfate solution; and carrying out extraction and selective reverse extraction on ammonia leaching liquid, so as to obtain a high-purity nickel sulfate solution and a high-purity copper sulfate solution, and carrying out vulcanization cobalt precipitation, oxidation acid leaching and extraction purification on raffinate, so as to obtain a high-purity cobalt sulfate solution. The method is high in extraction rate of valuable metals and applicable to the treatment of multiple waste lithium ion battery raw materials and efficient utilization of multiple elements, and sorting is not required.

Description

technical field [0001] The invention relates to a treatment method for waste lithium ion batteries, in particular to a smelting method for comprehensively recovering valuable elements such as lithium, nickel, cobalt, manganese, copper and aluminum from waste lithium ion batteries. It belongs to the field of electronic waste recycling and recycling. Background technique [0002] In recent years, under the background of the era of green and environmental protection, my country's new energy vehicles have experienced rapid growth. With the continuous improvement of production capacity, the number of waste lithium-ion batteries is increasing, and the resulting shortage of resources and environmental problems are becoming more and more serious. [0003] At present, there are mainly chemical methods and mechanical methods (physical methods) for the treatment of waste lithium-ion batteries, but both methods need to classify the current collector, positive electrode powder, graphite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C22B7/00
CPCC22B7/008H01M10/54Y02P10/20Y02W30/84
Inventor 王成彦张家靓胡军涛陈永强
Owner GUANGDONG GUANGHUA SCI TECH
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