Abstract
It is often desirable to predict with confidence the performance of a full-scale mill using good quality laboratory data. In the present paper, the sensitivity of Austin's scale-up procedure to batch grinding data was investigated.To this end, the effects of breakage function and selection function parameters on the product of a full-scale mill in open circuit were simulated. An array of numbers was randomly generated around the average value of the batch milling parameter considered and within a predefined range. Then, the mill products corresponding to the array of values were calculated.After analysis, Austin's scale-up model was found to be more sensitive to the selection function than the breakage function. Selection function parameters should therefore be measured with great care when modelling open mill circuits.
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