Title: Improving grinding efficiency by increasing load bulk density through the use of Cylpebs instead of balls

Authors: Mohammad Hasan Golpayegani; Bahram Rezai

Addresses: Mining Engineering Faculty, Amirkabir University of Technology (AUT), Tehran, Iran ' Mining Engineering Faculty, Amirkabir University of Technology (AUT), Tehran, Iran

Abstract: Cylpebs, cylindrical grinding media with the same diameter and length, have a higher bulk density than balls. Accordingly, without publishing data, a Cylpebs manufacturer has claimed that the efficiency and capacity of ball mills are increased using Cylpebs. Hence, comparative closed-circuit grinding tests using balls and Cylpebs were conducted at the same fractional mill filling but with different limiting screen apertures. Moreover, the grinding media voidage was determined. The results imply that the voidage of Cylpebs is around 20% lower than that of balls, indicating Cylpebs have about 12% higher bulk density than balls. The specific energy obtained with Cylpebs was 10% less than that obtained with balls. Cylpebs provided more grinding efficiency than balls for coarse particles. Finally, it is revealed that at the same fractional mill filling, the capacity of the grinding circuit can be increased by up to 20% by using Cylpebs instead of balls.

Keywords: grinding; Cylpebs; ball mill; energy consumption.

DOI: 10.1504/IJMME.2022.129767

International Journal of Mining and Mineral Engineering, 2022 Vol.13 No.4, pp.277 - 290

Received: 04 May 2022
Accepted: 06 Dec 2022
Published online: 25 Mar 2023 *

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