Lithium battery recycling processing technology development route can be divided into different physical, thermal, wet three, physical recycling work, although the Chinese process design process to carry out simple low-cost but low recovery rate, easy to affect the performance of recycled materials through the introduction of impurities. Roughly estimated, the recovery of 1 ton of ternary material research using fire and wet process and the corresponding cost management were 16,000 yuan and 30,000 yuan, while the corresponding profits were 1476.6 yuan and 9265.6 yuan; from the perspective of the return on investment to consider, fire is not as good as the wet process, so our domestic for the enterprise to use more of this process is more mature wet recycling route.
The main technical route of the main domestic power battery recycling enterprises is the wet method. Due to the huge difference between the wet method and the dry method, the anode precursor enterprises with similar process paths have technical homology and more technical advantages in the layout of lithium battery recycling.
As far as developed countries in Europe and the United States are concerned, power battery manufacturers often bear the main responsibility for battery recycling, and host country factories and battery leasing companies play a cooperative role in recycling.
According to the different responsibilities of the main body,Lithium battery recycling it can be divided into the power battery manufacturer recycling mode represented by Japan (including battery leasing companies through EV dealers), the industry alliance recycling mode represented by Europe and the United States (power battery manufacturers work together to form a recycling alliance) and the third-party recycling mode.
Physical method process and flow
The waste power battery can be crushed, sifted, separated by magnetic separation, fine crushing and other means to be able to obtain more valuable products, and then enterprises to sell or material repair, to achieve China's battery remanufacturing.
Ternary batteries: remove the battery shell to obtain electrode materials, add limestone in a high-temperature environment for roasting, lithium, aluminum after roasting to form a slag, not recycling; copper, nickel, cobalt,battery production line manganese alloy formed by further processing after extraction.
Lithium ferrous phosphate: electrode materials do not contain precious metals, ordinary pyrometallurgical process is not applicable; the use of improved pyrometallurgical recycling technology, through calcination to remove the organic binder, so that lithium ferrous phosphate powder is separated from the aluminum foil, to get the lithium ferrous phosphate materials, and then add the appropriate amount of raw materials to get the required lithium, iron, phosphorus molar ratio, the synthesis of a new high-temperature solid-phase method of lithium ferrous phosphate.
Wet process and flow
Wet Recovery of Lithium Iron Phosphate: Dissolve the cathode plate in strong acid, then add alkali to separate the lithium, iron and phosphate ions in the solution, and get the regenerated lithium iron phosphate after high temperature roasting.
Ternary wet recovery: After the metal is dissolved in the solution in the form of ions,labeling machine according to the proportion of nickel, cobalt and manganese in the ternary material to be synthesized, the corresponding metal salt is added appropriately, and then alkali is added to precipitate out the metal co-precipitates, and then the resulting precipitates are mixed and sintered with lithium carbonate according to the ratio to form regenerated ternary material. The specific process is as follows.