Treatment method of waste lithium iron phosphate

A technology of lithium iron phosphate and treatment methods, which is applied in chemical instruments and methods, phosphorus compounds, waste collectors, etc., and can solve the problems of reduced safety performance of lithium iron phosphate batteries, impact on service life of lithium iron phosphate, large amount of sewage treatment, etc. problems, to achieve the effect of resource utilization, high capacity, and less waste water generation
CN110690429AActive Publication Date: 2020-01-14四川朗晟新能源科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
四川朗晟新能源科技有限公司
Publication Date
2020-01-14

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Abstract

The invention discloses a treatment method of waste lithium iron phosphate. The method comprises the following steps of: pretreating a waste lithium iron phosphate material, adding the pretreated material into a phosphoric acid solution, performing reacting and then filtering to obtain a first filtrate and a first filter residue; adding sulfide into the first filtrate for reaction, and then performing filtering to obtain a second filtrate and a second filter residue; adding iron powder into the second filtrate, performing stirring to react, removing iron, adding battery-grade lithium carbonateinto the obtained iron-removed material, and performing stirring to react until no bubbles are generated so as to obtain a reaction material; adding the reaction material into a water-soluble organiccarbon source, performing stirring, dispersing and dissolving, and performing spray drying on the obtained material in a spray dryer to obtain a dried material; and putting the dried material into aroller way furnace, performing calcining, crushing, mixing and screening, removing iron, and carrying out vacuum packaging. According to the method, resource utilization of the waste lithium iron phosphate can be achieved, high-end circulation is achieved, the recovery rate of all elements is high, the waste water generation amount is small, and the obtained lithium iron phosphate is excellent inperformance.
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Description

technical field

[0001] The invention relates to a treatment method for waste lithium iron phosphate, belonging to the technical field of waste treatment. Background technique

[0002] With the adjustment of new energy policies, the subsidy has gradually declined. At the same time, the price of lithium iron phosphate has also dropped from the previous 100,000 / ton to the current 45,000 / ton, and its application field has gradually expanded. From the previous bus Vehicles are extended to special purpose vehicles, low-speed electric vehicles and electric vehicles below A0 level.

[0003] Recently, the Ministry of Industry and Information Technology released the fourth batch of "Catalogue of Recommended Models for the Promotion and Application of New Energy Vehicles" in 2019. A total of 238 models were on the list, among which the models supporting lithium iron phosphate came from JAC , BAIC New Energy, Zotye Automobile , Chery Commercial Vehicles, Chufeng Automobile, FAW Jiefa...

Claims

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