T.Vizcarra, B. Wong
Presented at SAG Conference Vancouver, Canada September 22 – 26, 2019
JKTech has completed a comparative testing program of Bond tests as an addition to its “round-robin” quality control program for JK Drop Weight (JKDW) and SMC tests. Over seventy Bond tests of representative splits of quarry material were undertaken by over thirty participating laboratories. To JKTech's knowledge, this represents the largest comparative study of Bond testing reported in the literature.
The scale of the exercise meant that the variability due to systematic differences between laboratories, as well as the inherent experimental error of the test, could be decoupled. These “errors” in the Bond test are often under-appreciated in design, and the results are discussed in the context of implications for mill sizing. Other major factors that drive ball milling efficiency, which are not accounted for by the Bond equation but are strongly evident in the JKTech database, are also presented.
Design risk, Bond test, variability
*Tim G. Vizcarra (1) & Bevin Wong(1)
1 JKTech Pty Ltd, 40 Isles Road, Indooroopilly, QLD, Australia, 4068
The authors wish to thank JKTech for permission to publish this paper. Prof.Tim Napier-Munn and Greg Lane are gratefully acknowledged for useful comments and feedback in the preparation of this manuscript
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