Capturing Nanoparticles in Alumina Production

Abstract

The movement of charged dust particles of different sizes in an electrostatic precipitator is studied. It is found that such particles acquire different velocities before they are deposited in the precipitator. They differ significantly from one another in the curvature of their trajectories, which makes it easier to precipitate nanoparticles from the general dust-air flow. A unit is proposed for capturing the nanosized fraction of dust particles in the upward pneumatic transport of bulk materials during alumina production.