Comparison of grinding media - Cylpebs versus balls

Shi, F. (2004) Comparison of grinding media - Cylpebs versus balls. Minerals Engineering, 17 11/12: 1259-1268.


Author Shi, F.
Title Comparison of grinding media - Cylpebs versus balls
Journal name Minerals Engineering   Check publisher's open access policy
ISSN 0892-6875
Publication date 2004
Sub-type Article (original research)
DOI 10.1016/j.mineng.2004.05.019
Volume 17
Issue 11/12
Start page 1259
End page 1268
Total pages 10
Editor B.A. Wills
Place of publication Oxford, UK
Publisher Elsevier Ltd
Collection year 2004
Language eng
Subject C1
290702 Mineral Processing
640300 First Stage Treatment of Ores and Minerals
Abstract Cylpebs are slightly tapered cylindrical grinding media with a ratio of length to diameter of unity. The manufactures have made conflicting claims regarding the milling performance of Cylpebs in comparison with balls. One major point of interest is which one grinds finer at the same operating conditions. The difficulty in comparison is due to the shape difference. The two grinding media have different surface area, bulk density and contact mechanisms in grinding action. Comparative tests were conducted using the two types of grinding media in a laboratory Bond ball mill at various conditions of equality such as media mass, size distribution, surface area and input specific energy. The laboratory results indicate that at the same specific energy input level the Cylpebs produce a product with slightly less oversize due to their greater surface area, but essentially the same sizing at the fine end as that produced with the balls. The reason may be that the advantage of greater surface area is balanced by the line contact and area contact grinding actions with the Cylpebs. A new ball mill scale-up procedure [Man, Y.T., 2001. Model-based procedure for scale-up of wet, overflow ball mills, Part 1: outline of the methodology. Minerals Engineering 14 (10), 1237-1246] was employed to predict grinding performance of an industrial mill from the laboratory test results. The predicted full scale operation was compared with the plant survey data. Some problems in the original scale-up procedures were identified. The scale-up procedure was therefore modified to allow the predicted ball mill performance to match the observed one. The calibrated scale-up procedure was used to predict the Cylpebs performance in the full scale industrial mill using the laboratory tests results. (C) 2004 Elsevier Ltd. All rights reserved.
Keyword Engineering, Chemical
Mineralogy
Mining & Mineral Processing
Comminution
Grinding
Q-Index Code C1

 
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