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Laboratory Grindability Test Results and Scale-Up (6 replies)
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A laboratory grind-ability test made in closed circuit. Should it be regarded as a miniature commercial mill operation?
It is normally not a big problem but it depends on the size of the small scale mill and the operation mode. In dry grinding we have close relation between small and large scale. We have used small lab units with 400 and 600 mm diameter and scaled it up to 3 m mills wiht good results. In both case we used air classifiers wiht similar efficiency which is critical. In wet milling, I guess it will be very much depending on your flow conditions, water concentration, efficiency of your screens or hydrocyclone etc. Therefore it will be much more difficult to control it. But if you make enough tests with differnet conditions, it will work. It is also important to use correct calculations for larger mills.
But still, should its performance be scaled- up to the size of a commercial mill?
Does the screen analysis of its product and circulating load resemble those of a commercial mill?