How to superfine lithium iron phosphate
Lithium iron phosphate battery is a new type of lithium ion battery that has attracted widespread attention in recent years. Because lithium iron phosphate ( LiFePO4 ) material has the characteristics of high specific energy, long cycle life, stable structure, good safety performance, and low cost, lithium iron phosphate Power batteries have many advantages such as high mass specific energy, low unit price, and high working potential. The pulverization of lithium iron phosphate is a very important link. The products processed by the principle of jet pulverization have narrow particle size distribution, no excessive pulverization and large particles, low fine powder rate, and high pass rate. They are the first choice of most battery material manufacturers. The lithium iron phosphate special jet mill has the characteristics of high yield, uniform particle size distribution, and good particle morphology. It can be widely used in micron-level experiments and production of battery powder cathode materials.
The special jet mill for lithium iron phosphate is a kind of equipment that uses high-speed airflow to achieve ultra-fine grinding of dry materials. It consists of a feeding zone, a crushing zone, and a classification zone. The material enters the crushing zone through the feeding zone, and the crushed material enters the classification zone with the upward air flow under the action of the negative pressure system. The fine particles that meet the particle size requirements enter the cyclone separator and the dust collector to collect with the air flow, but do not meet the particle size requirements The coarse particles return to the crushing zone to continue crushing.
The special jet mill for lithium iron phosphate also has the following performance advantages:
1. The jet mill has the ability of shaping, the finished particle has an excellent morphology, and can obtain spherical (potato-like) particles.
2. Narrow particle size distribution and high tap density of the finished product.
3. Mechanical ultra-fine pulverizer, low over pulverization, and the finished product rate can reach 75%-95% or more.
4. The inside of the equipment can be lined with wear-resistant materials, and the finished product has high purity and low equipment wear.
5. The air flow classifier adopts frequency conversion adjustment, which can be adjusted arbitrarily between 0.5μm and 100μm.
6. The equipment runs stably, and there is no difference or change when it is turned on continuously for a long time.
7. Fully enclosed negative pressure operation, automatic control, low noise and no dust pollution.
The structural characteristics of the special jet mill for lithium iron phosphate are:
1. The material contact cavity is lined with ceramic or coating to prevent iron pollution caused by the material crushing process and ensure the purity of the crushed items.
2. Does not heat up. The material is crushed under the state of gas expansion, and the temperature will not rise.
3. The wear is small, the particles collide and crush each other, and rarely collide with the wall surface. It is suitable for crushing materials with Mohs hardness below nine.
4. Low energy consumption, 15%~25% energy saving compared with other types of jet mills.
It adopts advanced automatic control, real-time display of running status, simple operation, and can form a central monitoring system with the equipment control system according to the actual requirements of customers to realize remote monitoring.