Aerofine Classifier (AC)

The Aerofine Classifier (AC) realizes high-accuracy classification at levels of single microns or smaller. Unlike classifiers that have rotating parts, a swirling flow (free vortex) is generated by the fixed vanes to apply centrifugal force to particles. At the same time, air drag that acts in the opposite direction to the centrifugal force is applied to particles. The classification point is set according to the balance between these two forces (centrifugal force and air drag), and the particles are classified into coarse particles and fine particles. Compared to a forced vortex that is generated by the rotation of the classification vanes, a free vortex tends to create a vortex at a higher speed and can apply greater centrifugal force to particles.
Classification at levels that could not be achieved has now been made possible by controlling a free vortex, which is difficult to control, with our proprietary technology.

A swirling flow inside this equipment is generated by air that is sucked from the atmosphere by a blowder and passes through multiple inclined vanes installed on the outer cirmumference. In addition, a high-speed vortex is formed by injecting compressed air as the secondary air, leading to the achievement of further micronization and higher-accuracy classification of powder.

This equipment has no moving parts inside. It is excellent in ease of disassembly and cleaning and allows easy handling of adhesive or abrasive powders.

The presence of coarse particles that are larger than 1 μm in diameter and collected as fine particles is problematic for barium titanate that forms the dielectric layer of multilayer ceramic capacitors.
Other conventional classifiers have not achieved the submicron classification and improvements of cohesion and adhesion. However, the Aerofine Classifier (AC) solves these problems by forming a powerful vortex, realizing classification that the maximum diameter of fine particles is smaller than 1 μm.

We are currently working on the application of the classification to nanosized superfine powder.
While maintaining the high-accuracy classification and simple structure with no rotor, which are the features of the conventional Aerofine Classifier (AC), we have achieved classification at a nm level, which was impossible with a dry type, by generating a swirling flow at an even higher speed than the conventional type. We will continue to take on the challenge of achieving the world’s smallest cut point.