Method for recovering valued metals from waste lithium cobaltate batteries
A technology of old lithium cobaltate and valuable metals, applied in the field of waste power battery recycling, can solve problems such as complicated steps, waste of resources, and environmental pollution, and achieve the effects of low cost, environmental friendliness, and simple process
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[0029] Example 1
[0030] This embodiment provides a method for recovering valuable metals from waste lithium cobalt oxide batteries, which includes the following steps:
[0031] S1: Discharge the waste lithium cobalt oxide battery and remove the outer packaging and outer shell of the battery with the aid of a shearing machine, take out the battery core, and pulverize the battery core until the area of the battery core fragments is less than or equal to 6cm 2 .
[0032] S2: Soak the cell fragments with N,N-dimethylformamide, and the solid-liquid ratio of the cell fragments to N,N-dimethylformamide is 20g / L, and at the same time intermittent mechanical stirring and ultrasonic vibration treatment for 2h , Get a solid-liquid mixture.
[0033] S3: Filter the solid-liquid mixture obtained in step S2 to obtain a filtrate and a filter residue. The filtrate N,N-dimethylformamide can be distilled and recycled after multiple uses. The filter residue is washed and dried with N,N-dimethylforma...
Example Embodiment
[0040] Example 2
[0041] This embodiment provides a method for recovering valuable metals from waste lithium cobalt oxide batteries, which includes the following steps:
[0042] S1: Discharge the waste lithium cobalt oxide battery and remove the outer packaging and outer shell of the battery with a shearing machine, take out the battery core, and pulverize the battery core until the area of the battery core fragments is less than or equal to 5cm 2 .
[0043] S2: Soak the cell fragments with N-methylpyrrolidone, wherein the solid-to-liquid ratio of the cell fragments to N-methylpyrrolidone is 60g / L, and mechanically stir and ultrasonically shake for 0.5h to obtain a solid-liquid mixture.
[0044] S3: Filter the solid-liquid mixture obtained in the step of immersing the cell fragments to obtain a filtrate and a filter residue. The filtrate N-methylpyrrolidone can be distilled and recycled after multiple uses. The filter residue is washed and dried with N-methylpyrrolidone, and sieved...
Example Embodiment
[0051] Example 3
[0052] This embodiment provides a method for recovering valuable metals from waste lithium cobalt oxide batteries, which includes the following steps:
[0053] S1: Discharge the waste lithium cobalt oxide battery and remove the outer packaging and shell of the battery with a shearing machine, take out the battery core, and pulverize the battery core until the area of the battery fragment is less than or equal to 4cm 2 .
[0054] S2: Immerse the cell fragments with a mixture of N,N-dimethylformamide and N-methylpyrrolidone with a mass ratio of 1:1, and the solid-liquid ratio of the cell fragments to the mixture is 100g / L , While stirring and ultrasonic vibration treatment for 3h to obtain a solid-liquid mixture.
[0055] S3: Filter the solid-liquid mixture obtained in the cell fragment soaking step to obtain filtrate and filter residue. The mixture of N,N-dimethylformamide and N-methylpyrrolidone can be distilled and recycled after multiple uses . The filter resi...
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