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Get Priceexisting models to accurately predict grinding mill power draw. This conclusion was supported by Morrell (1993) who evaluated a number of models using a large data base of power draws (Figure

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Get Price2 MODELLING THE SPECIFIC GRINDING ENERGY AND BALLMILL SCALEUP Ballmill scale up (Bond’s Law)Data: zBond work index w i zFeed D f and product d size (both 80% cumulative passing) Result: The specific grinding energy w Mill power draw P = wT, where T the mill capacity Mill dimensions (from Tables or charts)

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Get PriceOriginal Article Experimental investigation of the power draw of tumbling mills in wet grinding Moslem M Soleymani1, Majid Fooladi1 and Masood Rezaeizadeh2 Abstract In comminution, mill power plays a major role from the economics standpoint and is a critical design criterion.

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Get PriceThe ball mill motor power requirement calculated above as 1400 HP is the power that must be applied at the mill drive in order to grind the tonnage of feed from one size distribution. The following shows how the size or select the matching mill required to draw this power is calculated from known tables ‘the old fashion way’.

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Get PriceI believe that as circulating load in a ball mill increases beyond a critical point the mill power draw begins to fall so there is an adverse effect on grinding efficiency (apart from the obvious physical problems it causes like high scats rates, balls discharged from mill, sumps overflowing, cyclones clogging up etc.).

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