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You now have the unit capacity. Then take the volumetric feed rate of the new ore per time. Divide 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 about 5 minutes.

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11.08.2010 · 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. The retention time, also called residence time…

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MATERIAL RETENTION TIME IN A BALL MILL & VRM. Aug 11, 2010· 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 The retention time, also called residence time, is the ratio (M/Q) [h]...

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The L/D ratio of the ball mill was varied in four steps of 1.75, 2.1, 2.79 and 3.49, and the ball charge filling ratio was varied in three steps of 15%, 20% and 25%. The experiments clearly indicated that the optimal L/D ratio and the optimal ball …

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retention time ball mill P e t r oo cc e mm SS PP e ette rrs bb u g RR uuss iiaa 1 retention time ball mill 52 Mill retention time (MRT) 8 6 Industrial Test use of a G A in a large diameter ball mill 9 7 Mill 8 Technical and economic evaluation of grinding aids 12 81 Energy 82 Other 821 Mill output822 Quality 823 Cement mill [Chat Online] calculation for retaintion time of cement ball mill ...

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MATERIAL RETENTION TIME IN A BALL MILL & VRM Page 1 of 1. Aug 11, 2010· 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. Get price . calculate ball mill retention time lagclaussurrein.ch. MATERIAL RETENTION TIME IN A BALL MILL …

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MATERIAL RETENTION TIME IN A BALL MILL & VRM - Page 1 of 1. Aug 11, 2010· 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.

### Factors Affecting Ball Mill Grinding Efficiency

a) Mill Geometry and Speed – Bond (1954) observed grinding efficiency to be a function of ball mill diameter, and established empirical relationships for recommended media size and mill speed that take this factor into account. As well, mills with different length to diameter ratios for a given power rating will yield different material retention times, the longer units being utilized …

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flat over the range of 0.8 to 1.1 times the optimum ball diameter” (Taggart, 1945). • Test mills used for media sizing investigations need to be reasonably large (at least 0.4 m in diameter was suggested), depending on size of balls and ore being tested. • Ball surface wear rate is approximately constant, but with variations due to hardness, and other factors. Consumption is …

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At the time of this testwork , there were 3232 Bond ball mill work ... Retention Time. =. read more; Structural Evolution of Fullerene during Mechanical Milling. Nov 4, 1998 ... ried out in a ball mill. Although interesting results ... of fullerene were subjected to milling with a ball to ... crystalline structure with a lattice constant calculated to be 1.42 .... responding to C60 …

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The cost of a ball mill conversion from overflow to grate discharge is ‘fairly’ affordable at $65,000 for a 13′ x 15′ mill. This is only for the discharge head, grates and pulp filters (rubber). A comparison in laboratory of Overflow Discharge Ball Mill VS Grate Discharge Ball Mill.

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In Grinding, selecting (calculate) the correct or optimum ball size that allows for the best and optimum/ideal or target grind size to be achieved by your ball mill is an important thing for a Mineral Processing Engineer AKA Metallurgist to do. Often, the ball used in ball mills is oversize “just in case”. Well, this safety factor can cost you much in recovery and/or mill liner wear and ...

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How to find ball mill retention time in case of iron ore grinding in ball mill generates highintensity vibration and is too complex on account variable den . More Details; Iron Ore Grinding Ing Principle. China mining equipment iron ore ball mill of mining equipment iron ore ball mill of processing plant working principle the transmission dev drives cylinder to rotate …

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Material 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 compartmentThe retention time also called residence time is the ratio MQ h . Learn More calculate ball mill retention time. calculate ball mill retention time calculate ball mill retention time ball mill of thermal power …

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material retention time in cement ball mill - Cement mill notebook - SlideShare 7 Jan 2015, Tube mills have a ratio of length to diameter of [3-6 : 1], for ball mill this, the fineness of the material at the mill outlet depends mainly on the retention time, The main influencing factor on the retention time is the mill,

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a=Dynamic angle of repose of grinding charges, usually 43° for dry grinding slow speed ball mill, 51° for normal ball mill speeds. *The theoretical exponent is 2.5, but actual results indicate that 2.6 is more nearly correct.

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Optimization of continuous ball mills used for finish-grinding of cement by varying the L/D ratio, ball charge filling ratio, ball size and residence time December 2004 International Journal of ...