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The mill manufacturer specifies a load which is designed to be the optimum load applied to the bolts to hold the mill together for its entire life, which can be in excess of 20 years, some mill manufacturers specify an elongation, unfortunately they usually specify a torque figure which should in a best case produce the correct elongation, but rarely does.

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This formula calculates the critical speed of any ball mill. Most ball mills operate most efficiently between 65% and 75% of their critical speed.

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How to Make a Ball Mill. Ball mills are a special instrument used to break up hard solids into a fine powder. They are similar to rock tumblers in that the instrument is a rotating container filled with heavy balls to grind the substance...

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Technical Notes 8. - Mineral Technologies International,Inc. Where Mc is the total mass of the charge in the mill and Tf is the torque required to overcome friction. ...

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Ball Mill SPEED REDUCER DRIVE This is essentially a direct connected drive permitting the use of higher speed motors. The motor shaft is connected to the high speed shaft of a reducer by a flexible coupling and similarly the low …

The starting torque characteristic of this type of ball mill is not linear. Figure 2 shows the graph of mill speed versus torque requirement: Figure 2 The graph clearly shows that the torque requirement exceeds 120% at 80% speed. This is why the starting torque of the drive motor should be at least 130% of full load torque.

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Central Drive Ball Mill Torque and Power Calculation Copper ... Central Drive Ball Mill Torque and Power Calculation. The inching drive, also known as a barring or ... » Learn More. calculation of torque for grinding mill. calculation of torque of hammer mill « mining crusher. About. Our company was founded in 1987 Born in Shanghai Living in China.

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% Target 2-3 Rm Residue of separator feed.52 Rg .92 Rg .16 Rg Residue of coarse return. mts %F 37.C * log[{Ro+(C-1)*100} / {Rf+(C-1)*100}] C 2.52 log(Ro/Rf) .3 Target 9 Circulation factor C Formula-1 - F+G F F Fresh feed rate.C * log[{Ro+(C-1)*Rg} / {Rf+(C-1)*Rg}]]*100 Rf 3. tph Formula-2 10 Circulation load FF 150 CR 170 C 2.Ambuja …

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TECHNICAL NOTES 8 GRINDING R. P. King. 8-2 ... The torque required to turn the mill is given by Torque T ... steel balls in a ball mill, ...