Fluorination Removal of Waste Lithium Iron Phosphate Battery Recycling Solution

The recycling and utilization of waste lithium iron phosphate generally adopts the sulfuric acid system oxidation leaching process to extract lithium elements. During the oxidation leaching process, fluorine elements in the electrolyte and binder will accompany the entire recycling process, not only causing corrosion to production equipment, but also bringing them into lithium products, resulting in unqualified products. Therefore, it is necessary to develop effective defluorination processes and supporting solutions for the recycling and utilization of lithium iron phosphate batteries.

Lithium battery recycling field (full process solution for waste lithium iron phosphate batteries)

• Waste lithium iron phosphate batteries

• Discharge disassembly and recycling of positive electrode material

• Acid leaching

• Leachate

• Selective aluminum removal

• Deep adsorption for impurity removal

• Bipolar membrane combination recycling technology

• Lithium hydroxide

Production process impurity removal, removal of phosphorus, fluorine, calcium and magnesium ions, preparation of lithium hydroxide products.

The special adsorption material developed by Haipu can selectively separate fluoride ions or nickel ions from the lithium battery recycling solution, which not only reduces cost investment for enterprises, but also effectively protects the environment, thus achieving resource recycling and reuse.

For example, a new energy material technology research and development company in Anhui Province needs to remove fluoride from the lithium containing liquid produced during the production process. Based on the characteristics, difficulties, and treatment requirements of the liquid, our company's relevant specialized adsorption materials are selected for adsorption treatment of the liquid. The effluent can meet customer requirements, and the wastewater design indicators are shown in the table below.

*Wastewater Design Parameter Table

*Adsorption processing data

By using specially modified adsorption materials, the adsorption capacity is large, the equipment investment is low, and the operating cost is low. At the same time, it can effectively reduce the concentration of fluoride ions and help the safe, efficient, and green recycling and treatment of retired power batteries.

Fluoride removal from lithium battery recycling solution in the new energy industry

Summary

The Chinese lithium battery recycling market is a huge blue ocean, and with the unstoppable development of new energy, lithium battery recycling will also enter the TWh era.

The recycling and utilization of waste lithium batteries has both economic and environmental benefits, and is an important link in achieving the green "closed-loop" development of the new energy industry.

Under the influence of multiple factors such as policies, interests, and social responsibility, the green recycling system of lithium batteries from production to use to recycling will be further improved in the future.