This energy is expressed as kW·h/tonne, where kW is the grinding energy re quired "at the mill shell" multiplied by the inverse of throughput (h/tonne). ... To compare to a vendor table, add 2 feet to con vert the EGL to a flangetoflange length: 17 feet. Set the ball mill motor to MW, and look for a motor of a similar size in the ...
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WhatsApp: +86 18838072829Power as kW = E * (t/h dry solids) A ball mill can safely operate at 90% of its motor rated power, so choose a motor size like this: Motor size as kW = Power / You will not get a circulating load prediction from a Bond calculation. The assumption is that your secondary circuit is "efficient", whatever that might mean.
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WhatsApp: +86 18838072829Start ball mill motor (clutch disengaged). Engage ball mill clutch. Put weight controller in MANUAL mode and set output to 58 tonnes per hour (20% controller output) and slowly raise (2—3 minutes) the feed rate to 22 tonnes per hour (73% controller output). ... The recorder should show no major fluctuations and should read approximately 560 kW.
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WhatsApp: +86 18838072829The power the mill consumes is a function of the ore and/or ball charge geometry and the mill speed. The motor only supplies the amount of power (or torque really) that the mill demands, and we add some extra power to the motor to deal with 'upset' conditions like a change in ore density or a surge in ore level inside the mill.
WhatsApp: +86 18838072829Calculation Of Motor Kw Hp Of Ball Mill Up To 1200 Kw Of 60 Ton Output. The mill used for this comparison is a diameter by meter long ball mill with a 5000 HP drive motor. It is designed for approximately 90 per hour. Ball Mill DesignPower Calculation. 40 .
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WhatsApp: +86 18838072829Thus the power to drive the whole mill. = + = = 86 kW. From the published data, the measured power to the motor terminals is 103 kW, and so the power demand of 86 kW by the mill leads to a combined efficiency of motor and transmission of 83%, which is reasonable.
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WhatsApp: +86 18838072829The details of the ball mill motor are as follows. Power = kW or HP and the speed is 343 rpm. Load calculations (prior to failure analysis) The ball mill can experience failure based on the maximum normal stress theory as the working loads acting in the ball mill is concentrated across the seam of the mill periphery.
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WhatsApp: +86 18838072829If your motor has an efficiency of and you measure 1000 kW at the motor input, then the motor output power you would measure (with a torque device) is 900 kW. This is why you are measuring more input power than the rated power; the rated "input" power would be 1500 HP divided by the motor efficiency.
WhatsApp: +86 18838072829the optimisation of a ball mill circuit and is supported with typical case study done by HOLTEC in a mio t/a ... Separator motor 300 kW Separator Fan 248300 m 3/h ESP Fan 74100 m 3/h 497 mmwg 375 mmwg 500 kW 110 kW ... production is obtained from a ball mill when the mill motor power is at a maximum and consequently the specific
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WhatsApp: +86 18838072829A generalized SAG mill power draw equation developed by Austin, is given by: where the parameters used in the model are defined as: mp= net mill power (kW) K = a constant (kW/ton ) D = mill internal diameter (m) L = mill length (m) J = fractional volume of mill filled by total charge. εB = effective porosity of the total charge.
WhatsApp: +86 18838072829The mill designer then takes that kW requirement and evaluates the numerous parameters, as all above have stated, to determine the energy transfer requirement from the mill motor to the particle surfaces to achieve the size reduction in the continuous operation. ... How in the world can a ball mill motor know the rate at which the slurry is ...
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