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Abstract Ball mills like other comminution devices consume large amounts of energy Mill operators often have to assess the power draft of mills for an entirely different set of operating conditions or for a reconfigured circuit It is shown that the power draft can be accurately predicted from analysis of the motion of the charge The motion of the charge is rigorously simulated with a

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May 01 2017 The power of a ball mill is obtained by multiplying the corresponding torque with the mill speed Thus the torque curves and power curves are similar Fig 20 shows 78 groups of DEM simulation results for the effect of rotation rate lifter height and lifter number on the power draw of the ball mill Each curve represents the variation of the

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In this research the effect of ball size distribution on the mill power draw charge motion regime and breakage mechanism in a laboratory ball mill was studied using the discrete element method DEM simulation The mill shell and crushing balls were made of Plexiglas and compressed glass respectively Modeling was performed using Particle Flow Code 3D PFC3D .

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Dec 18 2013 This quantity is small compared to the power used by a semi autogenous mill and a ball mill in a primary grinding circuit a ball mill can have an installed power of up to 15 MW while installed power for a SAG mill can go up to 25 MW However the energy used for fine grinding is still significant.

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May 01 2017 The power of a ball mill is obtained by multiplying the corresponding torque with the mill speed Thus the torque curves and power curves are similar Fig 20 shows 78 groups of DEM simulation results for the effect of rotation rate lifter height and lifter number on the power draw of the ball mill Each curve represents the variation of the

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Results show the mill ball charge shoulder angle is strongly affected by the liner lifter s face angle and that Morrell s Model C could be improved by including a correction parameter that reflects the power draw of a mill along the service life of its liner The correction parameter is to reflect the effect of wear on the shoulder angle.

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The ball and tube mills are low speed machines that grind the coal with steel balls in a rotating horizontal cylinder Due to its shape it is called a tube mill and due to use of grinding balls for crushing it is called a ball mill or both terms as a ball tube mill These mills are also designated as

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Ball mill power draw predicted from the Denver slide rule kW 0 200 400 600 Calculated ball mill power draw from the m odel derived kW Data compared Line y=x Fig 2 Comparison of the ball mill power draw from the Denver slide rule and the proposed model Dashed line corresponds to y=x.

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The mill product can either be finished size ready for processing or an intermediate size ready for final grinding in a rod mill ball mill or pebble mill AG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening a rod mill and some or all of the work of a ball mill.

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Jun 19 2015 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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Apr 01 1999 The calculated power draft is maximum at about 50 ball load According to Eq 1 mill power is a function of ball mass M b and the distance between mill center and the center of gravity of ball mass r g So as the mill filling increases M b goes up but r g decreases Therefore the power draft passes through a maximum.

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Dec 12 2016 If P is less than 80 passing 70 microns power consumption will be Ball Mill Power Calculation Example A wet grinding ball mill in closed circuit is to be fed 100 TPH of a

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