Lithium-ion battery cathode and cathode powder recycling technology
Release Time：2022-11-17 Source：Lithium battery recycling equipment Share：
Lithium battery cathode material recycling equipment Xingmao lithium battery cathode and cathode powder sorting technology. Lithium battery cathode material is the key material of lithium-ion battery, cathode and cathode together account for about 50% of the cost of lithium batteries. Lithium-ion battery cathode is mainly made of cathode active material, binder and additives mixed and evenly coated on both sides of the copper foil by drying, rolling and pressed to play a reversible role in removing/embedding lithium ions and storing energy, is the electrode of the lithium-ion battery oxidation reaction, playing a decisive role in the performance of lithium-ion battery charging and discharging efficiency, capacity density, etc., is one of the key materials for lithium batteries.
Currently in use and development of lithium battery cathode materials, transition metal oxides exhibit the best performance, mainly layered salt structure of lithium cobaltate, lithium nickel cobaltate, lithium nickel manganate and lithium nickel manganese cobaltate ternary materials, spinel-type lithium manganate, olivine lithium iron phosphate lithium manganese oxide. China's current cathode materials mainly include lithium cobaltate, metamaterials, lithium manganate and lithium iron phosphate. Lithium cobaltate is still the main force in the domestic small lithium battery field, ternary materials and lithium manganate are mainly used in small lithium batteries, in electric bicycles and electric tools are also used in part; lithium iron phosphate is currently used mainly in the field of electric tools and electric vehicles.
Lithium-ion battery anode and cathode materials in the entire lithium battery accounted for a very large proportion, after the retirement of used lithium-ion batteries have a great recycling value. Especially in the recycling of valuable metals, this market is more extensive.
Lithium battery positive material recycling equipment mainly consists of closed insulation climbing conveyor, closed air protection shredder, closed air shaftless screw conveyor, dust collection equipment, closed air lifting feeder, anaerobic cracking system, high temperature insulation ceramic filter purifier, cracking gas bridge fan, waste gas combustion heating system, tail gas emergency cooling system, tandem double alkali spray tower, aerosol separation, bridge induced fan and chimney, cracking material water cooling Closed air discharge, closed air cooling spiral conveying, negative pressure wind screening, high speed friction decomposition, airflow classifier and cyclone collection, closed ultrasonic screening equipment. Lithium battery negative electrode material recycling equipment mainly consists of closed insulation climbing conveyor, closed air preservation shredder, closed air shaftless screw conveyor, dust collection equipment, induced draft fan and other key equipment.
Lithium battery positive and negative electrode material recycling equipment is 0.3-0.5 tons per hour cracking processing, all the above equipment is ground level type, our company has done all the balance of the stability of each equipment operation, can be placed directly flat. The equipment is automatically controlled, only 2-3 people are needed to operate.
The role of the waste gas combustion heating system: Combine the crushing waste gas, cracking gas and external supplemental natural gas for comprehensive combustion heating.
1. integrated combustion of waste gas generated by cracking combustible gas, comprehensive sorting, etc. and external supplementary natural gas, each gas being transported separately to avoid the danger of organic gas explosion.
2. The burner used for combustion is professionally designed so that cracking gas and natural gas do not interfere with each other for simultaneous combustion, thus ensuring the safety of the combustion system.
3. The combustion system is equipped with oxygen detection, multi-point automatic temperature control, automatic adjustment of oxygen supply, water-type explosion-proof system, negative pressure heating system, urea injection denitrification, isolation and disconnection gas system and insulation system to ensure the safety of operation, and the combustion hot gas is led into the two sets of cracking system through negative pressure to supply heat.
4. Intelligent adjustment part of the combustion system; cracking gas and external supplemental natural gas are intelligently adjusted to have an inverse relationship, with a large amount of non-condensable combustible gas and a relatively small amount of external supplemental natural gas supplying supplemental gas, so that the combustible gas gets all fully burned and the two burn to achieve the stability of common external heat supply, and the system PLC forms an intelligent control to realize the mutual proportion of non-condensable combustible gas and natural gas heat supply.
5. The combustion system has 250-400MM heat-resistant insulation shell outside, so that the external temperature of the insulation shell is less than 40 degrees, which improves the utilization rate of combustion value.
6. Integrated combustion system reduces denitrification cost, so that denitrification can have a set of injection urea system.
Lithium battery cathode material recycling equipment lithium-ion battery recycling and cathode powder sorting technology