Introduction 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. The recycling technology of waste lithium iron phosphate battery is based on the waste lithium iron phosphate battery as raw material to prepare lithium chloride solution through discharge, disassembly and crushing, acid leaching, impurity removal and other processes, and then enter the company's lithium chloride production system to prepare anhydrous chlorine Lithium, battery-grade lithium carbonate, lithium hydroxide 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 sinking and other processes Nickel, cobalt and manganese purification solution; the nickel, cobalt and manganese purification solution is prepared through co-precipitation, filter press separation, drying and other process steps to prepare ternary precursors. The production process efficiently separates the extractant and by-products, reduces material consumption and improves resource recovery Rate, reducing the cost of the 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 in 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 from nickel sulfate solution prepared from nickel, cobalt and manganese hydroxide as raw materials (ZL201310552644.7); (2) A ternary cathode material precursor Preparation method (ZL201310485720.7). The production 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 production performance and durable. According to the operating conditions, process media characteristics and product requirements, various equipment shall in principle adopt standardized products, 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 production process and equipment selection fully consider the coordination between the various operating steps, and carry out reasonable matching according to the amount of reaction materials, reducing the production 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 production; (3) 1) Anti-corrosion materials are selected for the important reaction vessels of this project to reduce the corrosion of reaction materials to the equipment and ensure the safe progress of the reaction; (4) Realize automatic operation. On the one hand, automatic control improves the stability of the device and the overall average yield; 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