The basic working principle of an air classifier operates on the principle of using air flow to separate fine particles from coarse ones in a mixture. It leverages the differences in particles’ aerodynamic properties, such as size, shape, and density. In the process, the mixture is introduced into an air stream, moving at a specific velocity. An ejector unit accelerates particles before compressed air is injected through a feed nozzle into the classifier. Then, by the Coanda Effect, the Jetstream tends to flow along the Coanda block. Each particle injected into the classifier has an inertia dependent on its size (mass). The smaller particles, with little inertia, will be highly susceptible to the Coanda Effect and will flow closer to the Coanda Block. The larger particles, with more inertia, will be less affected by the Coanda Effect and fly farther into the carrier air jet. Here, by setting moveable classifications edges as appropriate, particles can be classified by size with astonishing accuracy and efficiency. This method enables the air classifier to efficiently sort particles into different grades or sizes, facilitating the processing of materials in industries such as mining, food, and, recently, battery-grade materials.
