A NONLINEAR POPULATION BALANCE APPROACH TO WET BALL MILL SCALE-UP DESIGN
SANCHES, E. M.; HERBST, J. A.; LO, Y. C.; SANCHES, E. M.; Generic Mineral Technology Center in Comminution, University of Utah; HERBST, J. A.; Generic Mineral Technology Center in Comminution, University of Utah; LO, Y. C.; Generic Mineral Technology Center in Comminution, University of Utah
Журнал:
Particulate Science and Technology
Дата:
1984
Аннотация:
ABSTRACTRecent research has shown that population balance models hold considerable promise as a basis for accurate ball mill scale-up from laboratory batch grinding tests. Researchers at the University of Utah have developed and tested a scale-up approach based on linear population balance models which when used with an “experimental linearization” procedure (referred to as a similar fineness testing) produces accurate predictions of mill dimensions and product size distributions for commerical mills.Since wet ball mill grinding kinetics are often highly nonlinear and the similar fineness procedure required to apply the linear model can be somewhat tedious experimentally, the development of a scale-up approach based on a nonlinear model which is experimentally simpler to use is desirable. In the current paper an approach involving an empirical nonlinear kinetic model and a distributed volume model for material transport is evolved. The approach Is tested by predicting mill performance for a variety of materials (limestone, quartz, iron ore concentrate) in pilot and commercial scale mills (up to 14ft. in diameter) based on data obtained in a 10 inch diameter batch ball mill.
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