1. Cascade utilization and raw material recycling
For retired power lithium-ion batteries, those who take the road of cascade utilization are to recover materials after the cascade utilization; for the direct material recovery, the batches are too small, there is no history to check, the safety monitoring is unqualified, and so on.
2. Method for extracting valuable metals from cathode materials
The current talk about the recycling of power lithium-ion batteries, in fact, does not fully recycle and reuse all kinds of materials on the entire battery. The important types of cathode materials include: lithium cobalt oxide, lithium manganate, ternary lithium, lithium iron phosphate and so on.
Hydrometallurgy is a method of selectively dissolving cathode materials in waste lithium-ion batteries with suitable chemical reagents and separating metal elements in the leachate. The hydrometallurgical process is more suitable for recycling waste lithium-ion batteries with relatively single chemical composition. It can be used alone or in combination with pyrometallurgy. It does not require high equipment and has low processing costs. It is a mature processing method and is suitable for Recycling of small and medium-sized used lithium-ion batteries.
Pyrometallurgy, also known as incineration or dry metallurgy, is to remove the organic binder in the electrode material through high-temperature incineration, and at the same time cause the metal and its compound to undergo oxidation-reduction reactions, and recover the low-boiling metal and Its compounds are recovered by screening, pyrolysis, magnetic separation or chemical methods from the metal in the slag. Pyrometallurgy has low requirements on the composition of raw materials and is suitable for large-scale processing of more complex lithium-ion batteries.
Post time: Oct-29-2021