A study of the effect of operating variables on the efficiency of a vibrating screen

• Published in: Powder technology Vol. 48; no. 2; pp. 161 - 172
• Main Authors: Standish, N., Bharadwaj, A.K., Hariri-Akbari, G.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 1986; Elsevier
• Subjects: Applied sciences; Chemical engineering; Exact sciences and technology; Screening; Solid-solid systems; Screening; Experimental study; Efficiency; Vibrating screen
• ISSN: 0032-5910; 1873-328X
• DOI: 10.1016/0032-5910(86)80075-4

The efficiency of screening sinter particles (0.25 – 3.5 mm) and coke particles (0.25 – 1.94 mm) in a vibratory screen (200 × 600 mm) is studied for a range of operating variables which include flow rate, deck angle, RPM, oversize in feed and mesh size. Kinetic approach is used to analyse the data and efficiency is quantified by the kinetic constants of the individual particle sizes involved. Regression analysis shows that for both materials the effect of feed rate is positive for all sizes, that of RPM and deck angle is negative for near-mesh particles and positive for other particles, whilst that of oversize is reversed, i.e., the effect is positive for near-mesh particles and negative for smaller particles. The significance of the results, which show for the first time the effect of operating variables on the screening of individual size particles in the feed, in modifying partition curves, is discussed. Comparison of the results with those reported by other workers in terms of traditional efficiency definitions is included.