Analysis of lithium-ion battery recycling technology and process characteristics

Lithium-ion battery recycling technology is mainly divided into waste iron phosphate lithium-ion battery recycling technology and waste ternary battery recycling technology. Waste lithium iron phosphate lithium ion battery recycling technology uses waste lithium iron phosphate batteries as raw materials to prepare lithium chloride ion solution through discharge, disassembly and crushing, acid leaching, and impurity removal, and then enter the company’s lithium chloride ion processing system to prepare no Water lithium chloride ion, battery grade lithium carbonate ion, lithium hydroxide ion and other products; waste ternary battery recycling technology uses waste ternary lithium ion batteries as raw materials, through discharge, primary crushing, powder selection, acid leaching, impurity removal, Lithium ion and other processes are used to obtain the nickel-cobalt-manganese purification solution; the nickel-cobalt-manganese purification solution is subjected to co-precipitation, pressure filtration separation, drying and other process steps to prepare a ternary precursor. The processing process efficiently separates the extractant and by-products, reducing material consumption , Improve the recovery rate of resources and reduce the cost of three wastes treatment. Important products of the lithium-ion battery recycling project include battery-grade lithium carbonate, lithium hydroxide, and ternary precursor materials. These three important products are all key new products of Jiangxi Province, and their technological level has reached the domestic leading level after being appraised by relevant experts organized by the Provincial Department of Science and Technology. The core technology of the project has been authorized with 2 national invention patents: (1) A method for removing cobalt and manganese by preparing nickel sulfate solution using nickel, cobalt and manganese hydroxide as raw materials (ZL201310552644.7); (2) A ternary cathode material precursor Preparation method (ZL201310485720.7). The processing equipment selected for the lithium-ion battery recycling project has a high degree of automation, and the materials, stiffness, strength, operation control system, and safety protection devices must meet the specifications. The equipment is advanced in technology, reliable in processing performance and durable. According to operating conditions, characteristics of process media and product requirements, various equipment shall be standardized products in principle, and non-standard equipment shall be separately designed according to relevant national standards. The advanced nature of the project is explained as follows: (1) The project selects domestic advanced equipment, the processing technology and equipment selection have fully considered the coordination between the various operating steps, and the reasonable combination of reaction materials is carried out to reduce the processing links. (2) All important equipment is equipped with frequency conversion equipment, which can save 10-15% of electric energy, and can reduce mechanical equipment failures, and save energy consumption while ensuring continuous processing; (3) ) The important reaction vessel of this project chooses anti-corrosion materials to reduce the corrosion of the reaction materials to the equipment and ensure the safe progress of the reaction; (4) Realize automatic operation. On the one hand, due to the automatic control, the stability of the device is improved, and the overall average yield is improved; on the other hand, the extensive use of automatic interlock protection, online analysis, and safety control instruments greatly improves the safety of the device. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How to deal with battery leakage