Screening kinetics of cylindrical particles

The kinetics of screening for differently shaped particles can be used to s eparate particles according to their size, as well as to their shape. Durin g a batch screen experiment the number of particles on the screen as a func tion of time was counted by using a CCD-camera and image analysing software . The screening kinetics of cylindrical particles shows a sudden increase a t a well defined frequency and after an optimum it reaches a constant value . The optimal frequency of the screen was shown to depend on the length of the cylinder. The measured screening kinetics could well predict the grade and recovery of a separation based on the screening kinetics. In a first at tempt to identify the critical elements of a physical model for the observe d screening kinetics, it was shown by experiment, that the distribution of particle orientations on a screen is similar to that on a closed surface. ( C) 1999 Elsevier Science B.V. All rights reserved.