Effect of ball size distribution on milling rate / François M. Katubilwa in Minerals engineering, Vol. 22 N° 15 (Décembre 2009)  

Public ISBD [article]  inMinerals engineering > Vol. 22 N° 15 (Décembre 2009) . - pp. 1283–1288 Titre : Effect of ball size distribution on milling rate Type de document : texte imprimé Auteurs : François M. Katubilwa, Auteur ; Michael H. Moys, Auteur Année de publication : 2010 Article en page(s) : pp. 1283–1288 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Grinding Particle size Ball distribution Selection function Résumé : This paper focuses on the determination of the selection function parameters α, a, μ, and Λ together with the exponent factors η and ξ describing the effect of ball size on milling rate for a South African coal. A series of batch grinding tests were carried out using three media single sizes, i.e. 30.6, 38.8, and 49.2 mm. Then two ball mixtures were successively considered. The original manufacturer’s recommended ball mixture was used to investigate the effect of ball size distribution on the selection function whereas the equilibrium ball mixture was used to validate the model. Results show that with the six parameters abovementioned, the charge mixture is fully characterized with about 5% deviation. Interestingly, the estimated parameters can be used in the simulator model allowing one to find the optimal ball charge distribution for a set of operational constraints. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687509001733 [article] Effect of ball size distribution on milling rate [texte imprimé] / François M. Katubilwa, Auteur ; Michael H. Moys, Auteur . - 2010 . - pp. 1283–1288. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 15 (Décembre 2009) . - pp. 1283–1288 Mots-clés : Grinding Particle size Ball distribution Selection function Résumé : This paper focuses on the determination of the selection function parameters α, a, μ, and Λ together with the exponent factors η and ξ describing the effect of ball size on milling rate for a South African coal. A series of batch grinding tests were carried out using three media single sizes, i.e. 30.6, 38.8, and 49.2 mm. Then two ball mixtures were successively considered. The original manufacturer’s recommended ball mixture was used to investigate the effect of ball size distribution on the selection function whereas the equilibrium ball mixture was used to validate the model. Results show that with the six parameters abovementioned, the charge mixture is fully characterized with about 5% deviation. Interestingly, the estimated parameters can be used in the simulator model allowing one to find the optimal ball charge distribution for a set of operational constraints. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687509001733

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