Zhengzhou Zhengyang Machinery Equipment Co., Ltd

How to recycle and reuse retired lithium batteries?

2022-04-29 14:05:31

The first is based on environmental protection. According to estimates, a mobile phone battery weighing about 20 grams can pollute 1 square kilometer of land for up to 50 years. In contrast, power batteries are larger and heavier and contain a lot of metal compounds. And phosphide, random disposal will pose a huge threat to the soil and the environment.

Secondly, based on resources, the production of power batteries is often accompanied by huge consumption of scarce resources such as lithium, nickel, and cobalt. Recycling retired power batteries not only alleviates the excessive consumption of scarce resources, but also increases the stability of raw material supply. sex.

Lithium battery recycling products

At present, there are two main ways to recycle retired power batteries:

One is cascade utilization, that is, the use of retired power batteries for grid energy storage, home energy storage and other fields that require low battery electrochemical performance by means of repair, modification or remanufacturing;

The other is recycling, first dismantling and recovering the available resources (mainly metals) in decommissioned power batteries through chemical, physical or biological means, and then using them in powder metallurgy and other fields.

Process flow of recycling scrap lithium battery by physical mechanical crushing and sorting method:

The waste lithium battery is sent to the first-level pulverizer by the conveyor for pulverization. The pulverized materials are sorted by the conveyor through the strong magnetic separator, and the non-ferrous materials are sent to the diaphragm Z-type separator for sorting. After sorting, the heavier materials are sent to the secondary multi-knife crusher through the auger conveyor for the second crushing;

The lighter materials separated by the diaphragm type separator are sent to a cyclone dust collector for separation, and then a cyclone dust collector separates the lighter materials and enters the upper and upper connected pulse dust collectors, and the heavier plastic film materials are collected by a cyclone dust collector. The lower part of the crusher is selected into a rotary screen; a rotary screen further subdivides the material; the lighter material in the second crushing is sucked by the second cyclone dust collector, which further separates the lighter material and enters the upper and upper connection pulse dust removal The heavier materials are separated into the second rotary screen for separation, and the larger particles separated by the second rotary screen enter the air separator for further separation.

The air separator separates the heavier copper powder and plastic materials, the air separator separates the lighter materials and enters the third cyclone dust collector for separation, and the third cyclone dust collector separates the lighter materials into the upper link. With the pulse dust collector, the heavier materials separated by the third cyclone dust collector enter the third rotary screen for separation, and the third rotary screen separates black powder and plastic materials; the first, second and third cyclone dust collectors Lighter materials enter the pulse dust collector, and after being filtered by the pulse dust collector, the materials fall into the fourth rotary screen through the lower outlet for screening and processing to obtain black powder products.

The existing waste lithium battery treatment process has the disadvantages of low recovery rate, easy generation of secondary pollution, and difficulty in further recycling of materials. Therefore, it is proposed whether the lithium battery can be broken and recycled by the crushing method, so that metals such as copper and graphite can be recovered finely. Lvjie Environmental Protection provides a waste lithium battery recycling and processing production line. By improving the overall recycling process, it realizes the classification and separation of waste materials in waste lithium batteries, and at the same time avoids environmental pollution during its processing.

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