Numerical verification of a non-preferential-breakage liberation model

Gay, Stephen L. (1999) Numerical verification of a non-preferential-breakage liberation model. International Journal of Mineral Processing, 57 2: 125-134. doi:10.1016/S0301-7516(99)00011-3


Author Gay, Stephen L.
Title Numerical verification of a non-preferential-breakage liberation model
Journal name International Journal of Mineral Processing   Check publisher's open access policy
ISSN 0301-7516
Publication date 1999-01-01
Sub-type Article (original research)
DOI 10.1016/S0301-7516(99)00011-3
Open Access Status
Volume 57
Issue 2
Start page 125
End page 134
Total pages 10
Editor J. M.Cases
R. P. King et al
Place of publication Netherlands
Publisher Elsevier Science
Language eng
Subject C1
290702 Mineral Processing
640300 First Stage Treatment of Ores and Minerals
Abstract A model is presented that allows the liberation distribution of particles resulting from comminution to be estimated using the texture of the original ore. The model, which assumes non-preferential breakage, is based on stereology and therefore requires the texture to be defined in either one or two dimensions. The problem is solved by separating it into two tasks. The first task is to obtain a representation of the planar or linear intercepts that would be obtained if the ore was broken and a set of similarly-sized child particles was sectioned. This is done by using the intercept distribution of previously-broken similarly-sized particles to create a mask. The mask is applied to the texture to simulate the creation of the new intercepts. The second task is to estimate the liberation distribution using the intercepts. This problem is solved by using a stereological correction. The model has been verified by numerical simulation. A Boolean ore with spheres as primary grains was simulated in three dimensions. This ore was intersected with similarly-sized spheres to simulate breakage into spheres. The liberation distribution of these spheres provides the actual liberation distribution. The liberation distribution was also estimated, for both planar and linear intercepts, by using the masking method and a stereological correction. The accuracy of the model for the planar intercepts was found to be very good. For the linear intercepts, the accuracy of the model was not as good, nevertheless it provided a much better estimate than using the uncorrected liberation distribution for linear intercepts. (C) 1999 Elsevier Science B.V. All rights reserved.
Keyword Engineering, Chemical
Mineralogy
Mining & Mineral Processing
Comminution
Ore
Liberation Distribution
Mineral Liberation
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: Julius Kruttschnitt Mineral Research Centre Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 10 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 16 times in Scopus Article | Citations
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Created: Wed, 11 Jun 2008, 00:38:47 EST