What are the limitations of traditional lithium battery recycling methods?

Source: 2020 - 04 - 01 'hits: traditional recycling method have limitations is many used in lithium batteries of potential risk of environmental pollution, but they can also relieve fast consumption of strategic metals such as cobalt and lithium. Lithium battery of lithium, nickel, cobalt and other precious metals recovery has received the widespread attention, people have developed many kinds of technology to improve metal recovery and reduce the risk of solid waste treatment. Traditional recovery technology is divided into three categories: pyrometallurgy and hydrometallurgy and biological metallurgy. Generally speaking, the high temperature metallurgical technology is used to deal with waste battery or batteries positive plate. In the positive electrode binder and graphitized carbon can be removed at high temperature. Therefore, it is necessary to combined with other methods, residue in the process and metal recovery. But as a result of hydrometallurgy high energy consumption, large amount of dirt, hydrometallurgy recycling metal lithium battery has more advantages. Hydrometallurgy is the use of acid, alkali or other solution to dissolve the used metal in the lithium battery, and then by deposition, extraction methods of separation and recovery. Wet smelting process of acid, alkali by-products are in danger of environmental pollution. Biological method using microorganisms and interaction to dissolve metal on the surface of the waste. Mild conditions, environment friendly, but the choice of strains, domestication, and long-term training also limits the application in the field of biological method on the waste lithium batteries. 'waste of waste' help lithium ion battery recycling and reuse for large lithium iron phosphate batteries market share in China, the environmental function of data research institute of urban environment, Chinese Academy of Sciences has developed a method for the preparation of hydroxy iron phosphate lithium iron phosphate battery anode water heat recovery of waste lithium iron phosphate batteries. Lithium iron phosphate battery fully discharge after disassembly, get positive plate containing lithium iron phosphate data. After 180 & deg; C water treatment after 5 hours, the positive data can be effectively separated from the aluminum foil. During this period, mainly low-value components into three hydroxyl iron phosphate ( FPOH) , can absorb the heavy metal lead ions in water, effectively catalytic hydrogen peroxide degradation of organic pollutants, such as dye methylene blue. The results showed that the adsorption of lead ions were FPOH for 43. 203 mg/g, and eventually lead to form stable hydroxyl phosphate deposits. After quenching experiments, speculation FPOH catalytic mechanism of hydrogen peroxide degradation of organic dye is fenton reaction generated hydroxyl free radicals are involved in the degradation reaction. This study for a higher proportion of our lithium ion battery of lithium iron phosphate battery recycling provides a method of waste disposal of waste.