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Contact Supplier2010-08-11· Re: MATERIAL RETENTION TIME IN A BALL MILL & VRM. You could do that by measuring the material flowrate Q[tons/h] through the mill as well as the quantity M[tons] of material that accumulates within the mill.

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Contact SupplierMaterial retention time in a ball MILL & VRM. Dear all can anybody suggest me how to calculate the material retention time in a closed circuit ball MILL in each compartment?The retention time, also called residence time, is the ratio (M/Q) [h] .

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Contact Supplierwas low retention time averaging 0.85 minutes and Steane and Hinkfuss (1978), claimed the 18 ft diameter mill size was less ef cient than smaller mills. However, the author argues ﬁ the hard coarse ore was the culprit. It was surprising that the ball mill work index was averaging only 11.6 kWh/t, which is not hard. A rod mill work index ﬁ gure was not found but was thought to be in the 16 ...

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Contact SupplierThe conclusion is that it is quite possible to control the quality, and the parameter with the biggest impact is retention time in the mill controlled by the dam ring height

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Contact SupplierDivide the unit capacity by the feed rate and you have the nominal retention time. Say your unit capacity is 1/2 cubic meter and you are feeding 6 cubic meters per hour, your retention time would be …

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