Advanced dry recycling production process of waste lithium battery recycling pro
Release Time：2022-10-31 Source：Battery Recycling Machine Share：
In recent years, with the common application of lithium-ion batteries in power tools, electric vehicles, energy storage batteries, etc., the use of lithium-ion batteries has been rising year by year, at the same time, a large number of waste lithium batteries recycling and disposal problems are imminent. Waste lithium-ion batteries have a high value of recycling. GreenJet environmental protection lithium battery recycling and processing equipment and battery chip processing equipment has mature operating experience and good benefits since its operation. The waste electrode is recycled from the waste electrolyte of the lithium battery manufacturer, which is a general solid waste recycling, and one lithium battery pretreatment line, one positive electrode processing and recycling line and one negative electrode processing and recycling line are built to recycle the waste power lithium battery components. The main process is dry recycling.
According to the different forms of incoming materials, the waste power lithium battery enters the positive electrode recycling line after pretreatment (discharging, dismantling, drying, shredding, wind selection, secondary drying), and the recovered waste electrode material enters the positive and negative electrode processing and recycling line respectively according to the positive and negative electrodes, and the electrode is broken, activated by electron beam, crushed and sorted to get the waste lithium battery parts and packaged into storage. The production line adopts crushing and sorting process, using mechanized or automatic equipment to crush and sort the battery monomer containing electrolyte and organic solvent under negative pressure, the crushing and sorting process should make the waste battery electrode material powder, collector and shell separated in the subsequent steps, and the crushing and sorting process takes closed collection.
The recycling industry of waste lithium-ion batteries at home and abroad, the main big steps in the process of waste lithium batteries include: pretreatment, secondary treatment and deep treatment. Among them, the pretreatment process includes: discharge process, crushing, physical. Sorting; secondary treatment process includes: the complete separation of positive and negative active materials from the substrate, commonly used heat treatment method, organic solvent dissolution method, alkali dissolution method and electrolysis process; depth treatment includes: leaching, separation and purification process, extracting valuable metal materials. According to the classification of extraction process, the battery recycling methods can be divided into three major types of technologies: dry recycling, wet recycling and biological recycling, and the project mainly adopts dry recycling. Dry recovery mainly includes mechanical sorting method and high temperature pyrolysis method. Dry recovery process is short and the recovery is medium targeted, which is the preliminary stage to achieve metal separation and recovery. Mainly refers to the direct realization of the material or valuable metal recovery method without the solution and other media, mainly through the physical sorting method and high-temperature pyrolysis method, the waste lithium battery crushing for coarse screening classification, or high-temperature decomposition to remove organic matter for further elemental recovery. Mechanical sorting method is simple in operation and small investment in equipment, while high-temperature pyrolysis method is relatively complex in process and is mainly used to recover and process a large number of waste lithium batteries.
Lithium battery recycling processing equipment is mainly for the recycling of lithium batteries and poles, the current operation is good, the corresponding recycling process of ternary batteries and poles are more mature. Adopting the domestic advanced and mature production technology of recycling and comprehensive utilization of waste lithium batteries, the raw materials are discharged, crushed, finely crushed, quantitatively fed, destabilized, sorted and other processes are processed, and the generated exhaust gas is treated by purification devices to meet the standard discharge, and there is no production wastewater. As far as the process technology itself is concerned, it meets the requirements of the current industrial policy and is a conventional and mature technology allowed by the state and being used in large quantities. However, in terms of specific processes and equipment application, this project is higher than the average level of the current domestic technology.
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