Waste lithium-ion material recycling and treatment technology

Lithium-ion battery mainly relies on lithium ions embedded and escaping in the positive and negative electrode materials to transfer energy. Depending on the applicable equipment and place, lithium-ion batteries have cylindrical, rectangular and square shapes, but they all contain the following five parts: positive electrode, negative electrode, electrolyte, organic diaphragm and shell.

Resourcefulness of discarded lithium-ion batteries

Discarded lithium-ion batteries have remarkable resourcefulness and contain a large amount of valuable metals (cobalt, lithium, nickel, etc.), which can achieve environmental, social and economic benefits if recycled by scientific and technical means.

Pollution of waste lithium batteries

Once the electrode materials of waste lithium-ion batteries enter the environment, the metal ions in the positive electrode of the battery, the carbon dust in the negative electrode, the strong alkali and heavy metal ions in the electrolyte will cause significant environmental pollution.

Lithium battery recycling technology

The metal recycling process for used lithium-ion batteries mainly includes physical sorting, pyrometallurgy and hydrometallurgy.

1.Physical sorting method

Physical sorting method is based on the material size, density magnetic and other material performance differences in the sorting method, mainly screening, gravity sorting, flotation, magnetic separation, etc.

2.Wet metallurgy method

Wet metallurgy uses pretreatment (disassembly, crushing, separation, selection, heat treatment, etc.) technology to separate the collector fluid of waste lithium-ion batteries from the electrode material, and then separates and purifies cobalt by precipitation, extraction, ion exchange, electrodeposition and other methods.

3.Pyrometallurgical method

Pyrometallurgy requires stripping the battery shell, mixing the battery core with coke and limestone, and roasting by reduction to obtain a combination of lithium metal, cobalt, nickel and aluminum into a carbon alloy; the fluorine and phosphorus in the electrolyte are solidified in the slag, which can be used as an additive in construction materials or concrete. Then deep processing is done, and the whole process is done at high temperature.

In response to the common problems in the industry, such as high energy consumption, difficulty in recovering valuable materials, and difficulty in treating waste gas, Toplite Technology has developed a clean recycling treatment system for waste lithium materials by adopting unique pollutant control technology.

Technical features.

① Automated continuous production, high processing efficiency;

② Complete pyrolysis of raw materials, high utilization of waste heat, low energy consumption;

③ Continuous low-temperature anaerobic pyrolysis production process can realize electrolyte low-temperature volatile harmless treatment;

④ The whole treatment process adopts unique pollutant control technology, no secondary pollution;

⑤ The recovery rate of valuable metal materials is over 90%.

No matter which method is adopted for lithium battery recycling, the ultimate goal is to separate the metals and other materials inside and then recycle them again, SUNY GROUP, as a professional lithium battery recycling solution provider, has rich experience and perfect technical equipment, and can help customers provide targeted lithium battery recycling solutions. If you are interested or in need, you can contact us for consultation.