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The application of a simplified approach to modelling tumbling mills, stirred media mills and HPGR’s / A.L. Hinde in Minerals engineering, Vol. 22 N° 7/8 (Juin/Juillet 2009) 

Public ISBD [article]  in Minerals engineering > Vol. 22 N° 7/8 (Juin/Juillet 2009) . - pp. 633–641 Titre : The application of a simplified approach to modelling tumbling mills, stirred media mills and HPGR’s Type de document : texte imprimé Auteurs : A.L. Hinde, Auteur ; J.T. Kalala, Auteur Année de publication : 2009 Article en page(s) : pp. 633–641 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Comminution  Modelling  Simulation  Process  optimisation  Process  synthesis Résumé : Most modern population balance models for comminution invoke the concept of a specific breakage rate function and a breakage distribution function to describe breakage kinetics. One of the difficulties of this approach is that these functions are very difficult to measure directly. Consequently, it is usual to assume that these functions can be represented by simple equations with parameters that can easily be estimated from test data using back-calculation techniques. However, these estimates can be very sensitive to small measurement errors and are usually subject to very large variances. This paper presents a simplified approach to modelling comminution processes that invoke the concept of an energy-based cumulative breakage rate function to describe breakage kinetics. This function can be estimated directly from plant data and is well-suited to multi-component modelling of individual rock types and mineral species. Examples of the application of this simplified modelling approach are described for the treatment of platinum ores using ball mills, AG/SAG mills, HPGR’s and stirred media mills. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687509001071 [article] The application of a simplified approach to modelling tumbling mills, stirred media mills and HPGR’s [texte imprimé] / A.L. Hinde, Auteur ; J.T. Kalala, Auteur . - 2009 . - pp. 633–641. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 7/8 (Juin/Juillet 2009) . - pp. 633–641 Mots-clés : Comminution  Modelling  Simulation  Process  optimisation  Process  synthesis Résumé : Most modern population balance models for comminution invoke the concept of a specific breakage rate function and a breakage distribution function to describe breakage kinetics. One of the difficulties of this approach is that these functions are very difficult to measure directly. Consequently, it is usual to assume that these functions can be represented by simple equations with parameters that can easily be estimated from test data using back-calculation techniques. However, these estimates can be very sensitive to small measurement errors and are usually subject to very large variances. This paper presents a simplified approach to modelling comminution processes that invoke the concept of an energy-based cumulative breakage rate function to describe breakage kinetics. This function can be estimated directly from plant data and is well-suited to multi-component modelling of individual rock types and mineral species. Examples of the application of this simplified modelling approach are described for the treatment of platinum ores using ball mills, AG/SAG mills, HPGR’s and stirred media mills. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687509001071