Approximation of surface area of fines in blast induced fragmentation

Michaux, Simon P. and Djordjevic, Nenad (2010). Approximation of surface area of fines in blast induced fragmentation. In: , XXV International Mineral Processing Congress - IMPC 2010 'Smarter processing for the future. International Mineral Processing Congress 2010, Brisbane, Qld, Australia, (1029-1037). 6-10 September, 2010.

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Author Michaux, Simon P.
Djordjevic, Nenad
Title of paper Approximation of surface area of fines in blast induced fragmentation
Conference name International Mineral Processing Congress 2010
Conference location Brisbane, Qld, Australia
Conference dates 6-10 September, 2010
Convener Ralph J. Holmes
Proceedings title XXV International Mineral Processing Congress - IMPC 2010 'Smarter processing for the future
Journal name XXV International Mineral Processing Congress 2010, IMPC 2010
Place of Publication Carlton, VIC, Australia
Publisher Australasian Institute of Mining and Metallurgy
Publication Year 2010
Year available 2010
Sub-type Fully published paper
ISBN 9781921522284
Volume 2
Start page 1029
End page 1037
Total pages 9
Collection year 2011
Language eng
Abstract/Summary The surface area of fragmentation, especially in the finer size fractions, is a useful property to characterise the mechanisms of rock breakage. In the past, researchers have made assumptions with regard to the shape of fragments in order to estimate surface area, such as that all fragments are the same shape or all fragments are spheres. Often these assumptions were developed with inappropriate measures and returned considerable variability and error for the calculation of surface area. This paper reports a model to estimate fragmentation surface area from sieve sized raw data and a density measurement, with experimental validation down to a size fraction of –45 + 38 μm in a range of rock types. After characterisation of particle shape, a range of fragment shapes was found to be in each size fraction. Nevertheless, in the √2 sieve series the average fragment mass, volume and the size fraction standard deviations could be predicted reasonably accurately. Ellipsoid geometry was used to describe particle shape. Using these parameters and the number of fragments (also predicted) in each sieve size the individual surface area of each fragment was simulated.
Keyword Surface area
Self similarity
Fractal
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Mon, 13 Dec 2010, 09:46:10 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre