Devices for Dry Separation of the Spherical Particles from those Having a Non Spherical Shape from a Metallic Powder

Abstract

The paper describes the working principles for six types of separation devices mentioned in the literature, as well as two original types of separation devices devised by the author. In fact the functionality of each device presented in the paper is based on the difference between the friction coefficients – sliding friction for non-spherical particles and rolling friction for spherical ones, respectively. Due to this peculiarity, the two types of particles move along different trajectories, thus becoming separable. The paper also discusses the limit conditions ensuring the functionality of each separation device.

The Separation of Spherical Shape Powder Particles from the Non-Spherical Ones

“…Some details on the methods to produce the powders with spherical particles are given in [4]. A synthesis on the most important separation devices is the subject of the paper [5].…”