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The 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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calculating critical speed of ball mills - BINQ Mining. ball mill critical speed calculation – OneMine Mining and Minerals … Search Results Search Results for "ball mill critical speed calculation" »More detailed » Learn More. Ball Mills - Mine Engineer.Com. information on ball mills ... This formula calculates the critical speed of any 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.

May 04, 2008· I'm trying to build a ball mill and I need to figure out the rpm to calculate the reduction ratio. Thanks! Update: Hi all, I took an electric motor out of an old printer that I had, but it has no markings on it that would refer to the speed of the motor …

Calculations for mill motor power, mill speed and media charge n = Speed of ball mill in rpm. To calculate the speed of the mill, use the following formula . View this project

In most cases, the ideal mill speed will have the media tumbling from the top of the pile (the shoulder) to the bottom (the toe) with many impacts along the way. The ideal mill speed is usually somewhere between 55% to 75% of critical speed. Critical Mill Speed. Critical Speed (left) is the speed at which the outer layer of media centrifuges against …

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A ball mill is a type of grinder used to grind materials into extremely fine powder for use in mineral dressing processes, paints, pyrotechnics, ceramics and Read more How to Calculate Depth of Cut for Fanuc G76

May 04, 2008· I'm trying to build a ball mill and I need to figure out the rpm to calculate the reduction ratio. Thanks! Update: Hi all, I took an electric motor out of an old printer that I had, but it has no markings on it that would refer to the speed of the motor …

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IV. BALL MILLS Ball mills are one of the more common mills and use a closed cylindrical container that is rotated horizontally on its axis so that the media cascades. A typical ball mill has an L/D ratio of 1.5:1. Ball mills are filled with spheres or other shapes made of steel or ceramics; or with pebbles made of flint (or of an ore being ground).

In a ball mill of diameter 2000 mm, 100 mm dia steel balls are being used for grinding. Presently, for the material being ground, the mill is run at 15 rpm.

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