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ALEX G. DOLL CONSULTING LTD. (2000 - present) Independent consultant providing process engineering and computer consulting to the mining industry. Actively involved in technology transfer by providing short courses and guest lectures on grinding modelling and geometallurgy.

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develop grinding circuits, mainly in the field of SAG and ball mill circuits. There are several design methodologies available in the market or through the use of commercial software or expert consultants. This article presents a comparative analysis of three methods for grinding circuit design widely used in the market today,

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I think there are several factors to analyze. For example, you should find out if the mineralogy is different, sometimes it changes drastically in some parts of the deposit. In one Pb-Zn operation the clay content was higher than usual and the grinding circuit was overloaded. Your problem can occur in a SAG Mill or Ball Mill.

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