Waste lithium ion battery recovery method based on wet crushing
A lithium-ion battery and recycling method technology, applied in the fields of electronic waste recycling and circular economy, can solve the problems of difficult metal separation process, inability to effectively separate positive and negative active materials and current collectors, etc., to simplify the pre-selection process and cost. Low, shorten the effect of the process flow
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Embodiment 1
[0047] In the present embodiment, the waste lithium-ion battery is recycled by the following method, which specifically includes the following steps (the process flow is as follows: figure 1 shown):
[0048] (1) Soak the waste lithium-ion battery to be treated in 5% sodium chloride solution for 2h, the active material in the positive electrode material is nickel-based oxide, cobalt-based oxide, manganese-based oxide, and the soaking temperature is 25°C, The liquid-solid ratio is 2L / kg, and the residual electricity of the waste lithium-ion battery is released naturally;
[0049] (2) Mix the discharged lithium-ion battery with the organic solvent N-methylpyrrolidone (NMP), and carry out wet crushing in a shear crusher. The crushing time is 2 hours, and the solid-to-liquid ratio is 3kg / L. The particle size range of the solid is 50-100 mesh;
[0050] (3) solid-liquid separation is carried out to the solid-liquid mixture obtained after wet crushing, and the obtained liquid phase ...
Embodiment 2
[0057] In the present embodiment, the waste lithium-ion battery is recycled by the following method, which specifically includes the following steps (the process flow is as follows: figure 1 shown):
[0058] (1) Soak the waste lithium-ion battery to be treated in a solution of 0.1% ammonium chloride and potassium chloride for 72 hours, the active material in the positive electrode material is lithium iron phosphate, the soaking temperature is 60°C, and the liquid-solid ratio is 0.1L / kg, the remaining power of the used lithium-ion battery is released naturally.
[0059] (2) Mix the discharged waste lithium-ion battery with a mixture of trifluoroacetic acid and xylene, and perform wet crushing in an impact crusher and a jaw crusher successively. The crushing time is 0.5h, and the solid-to-liquid ratio is 0.1kg / L, the particle size range of the solid obtained by crushing is 50-100 mesh.
[0060] (3) solid-liquid separation is carried out to the solid-liquid mixture obtained a...
Embodiment 3
[0067] In the present embodiment, the waste lithium-ion battery is recycled by the following method, which specifically includes the following steps (the process flow is as follows: figure 1 shown):
[0068] (1) Soak the waste lithium-ion battery to be treated in a solution of 20% sodium sulfate and ammonium sulfate for 1 hour, the active substance in the positive electrode material is lithium iron phosphate, the soaking temperature is 10°C, and the liquid-solid ratio is 100L / kg, The remaining power of waste lithium-ion batteries is released naturally;
[0069] (2) After mixing cyclohexane, ethyl acetate and ethylene glycol at a volume fraction of 1:1:1, put the discharged waste lithium-ion battery into a cone crusher and a hammer crusher successively. Wet crushing, the crushing time is 20 hours, the solid-to-liquid ratio is 50kg / L, and the particle size range of the crushed solid is 50-100 mesh;
[0070] (3) solid-liquid separation is carried out to the solid-liquid mixture...
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