The key to dismantling and recycling lithium batteries is to separate the copper foil and aluminum foil in the negative electrode material from the metal elements of the positive electrode material in the single battery. Because the production cost of the positive electrode material is relatively high, the battery plate contains metal elements such as lithium, cobalt and nickel. The prices of these metal elements are relatively high and still have an upward trend, so the recycling value is relatively high. The lithium battery recycling processing equipment, lithium battery sustainable recycling solution process can process ternary power lithium batteries and lithium iron phosphate batteries, and realize the recovery of valuable metals in lithium batteries through physical separation methods. The products are poles, shells, positive and negative current collectors, and positive and negative electrode powder materials in waste lithium batteries.
Specific implementation:
1. Multi-component sorting system
The pyrolyzed materials are screened, wind-selected, magnetic-separated, eddy-electric-separated and other processes to obtain iron shells, aluminum shells, poles, positive and negative pole pieces respectively.
2.Dry stripping system
The positive and negative electrode sheets are stripped of the electrode powder, and the positive and negative electrode powder contained in the copper and aluminum foil is subjected to high-speed friction and dispersion by a dry stripping machine, and the positive and negative electrode powder on the surface of the copper and aluminum foil is peeled off, so that the copper and aluminum collide with each other during the high-speed friction and dispersion process, and each agglomerates into particles to obtain positive and negative electrode powder, copper particles, and aluminum particles.
3. Copper and aluminum separation system
Separation and collection of copper and aluminum are achieved by using equipment such as specific gravity machines or screening machines or color sorters.
4. Gas purification system
Exhaust gas: The source of exhaust gas generated by the system is mainly the electrolyte gas volatilized during the battery cell crushing process and the pyrolysis gas generated during the high-temperature pyrolysis process. Through cyclone dust removal + RTO high-temperature combustion + quenching + desulfurization and denitrification + lye absorption, the exhaust gas after treatment is discharged up to the standard, and the emission standard meets the local and national emission standards. The exhaust gas contains acid gases such as HF and HPO3, and after alkali washing, it enters the circulating water, and the circulating water reacts with the high calcium ion solution to form CaF2 precipitation and a small amount of calcium phosphate.
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