Battery powder, negative electrode material gas flow grinding, has excellent plastic ability, excellent finished particle shape, can obtain ball type (potato-shaped) particles. The particle size distribution is narrow and the finished product has a high density. Mechanical ultrafine pulverizer, low pulverization, the finished product can reach 75% -95%. The inside of the device can be inner lining the wear resistant material, the finished product is purified, and the equipment is small. Airflow classifier, using variable frequency adjustment, can be adjusted between 0.5UM-100UM. The equipment is running stable, and there is no difference and variation in continuous boot for a long time. Full enclosed negative pressure, automation control, low noise, no dust pollution.
The granular particle size of the product selected during the production process is within a certain range, and in fact, the particle size distribution of the product produced by the crusher is more wide range of particle size than the required particle size, most is difficult fulfil requirements. Therefore, during the pulverization process, the airflow classifier is one of the important links to improve ultrafine pulverization efficiency and production of fine powder products that meet the fineness and its level. The effect of the airflow classifier is based on the requirements of the production process, and the pulverized product is selected according to a certain particle size or different types of particles.
The representative of the airflow classifier has a gravity classifier, a thick grading machine, a centrifugal grading machine (also known as a centrifugal selection machine), cyclone classification machine, O- SEPA classifier, injection scroll classifier, forcibly eddy current classifier.
The airflow classifier is mainly composed of secondary wind, three wind and impeller, transmission system. When the production line works, the material is entered by the hierarchy of the grading machine under the action of the introduction of the air. The air solid two-phase flow is sufficiently dispersed under the action of the inadequate air and the material of the hierarchy.
When the air solid two-phase flow rises to the hierarchical region, each individual particles are subjected to centrifugal force generated by the graded rotation, and is subjected to a centering force generated by the air gravity. When the centrifugal force of the particles is greater than the heart force, the coarse particles above the fractionated diameter are smashed into the inner wall of the cylinder, and the inner wall of the tube is left to the secondary wind. Air is in the air of the air in the air, and the secondary venting in the cone is uniformly distributed into the tuning zone, and the thick mixed powder is placed on the wind sieve. Thus, the fine particles mixed into the coarse are separated, reflowed to the classified area, and the crude particles are discharged from the unloading device. Fine particles that meet the particle size requirementsAirflow enters the cyclone collector, the pulse dust collector is collected, and the purified gas is discharged into the atmosphere through the air blower vent
how to solve the deficiencies of the airflow classifier in terms of accuracy and energy consumption:
First, Increase the secondary body of the coarse powder exit. This solves the waste of particles that are not separated in the traditional grading method. After the grading, it is necessary to be aligned with the secondary air supply device, so that the coarse powder is effectively discharged.
Second, we just talked about the exit of the coarse powder, in fact, in the outlet export, it is necessary to carry out secondary ventilation. Such actions are to put a force to the fine powder, so that the fine powder is discharged smoothly. This also allows the airflow classifier to save unnecessary energy waste.
Third, the import of the secondary body is also energy-saving. But this method is advantageous. Still useful to use it carefully according to the actual situation.
In terms of quality inspection, ALPA powder technology is particularly stricter. It is well known that a manufacturing process of a ultrafine powder is often up to hundreds. As a special equipment, the airflow pulverizer is like a special process, and it is possible to make a big disaster. Therefore, ALPA powder technology has established seven process stop points in the production process, which is strictly controlled by different engineers, and each other is independent and mutual supervision, and it is timely discovery and solve the problem. Any detail is unqualified, it is unable to enter the proceeding process, which is the quality monitoring of AlPa powder technology to the production process.