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Slide shoe supported mills eased those concerns and made possible the lowering of normal filling levels of 40 to 45 to a new normal of 28 to 35 Ten to fifteen years ago two events took place which seemed to support the results of the preliminary investigations of low level filling and efficiency In the first case one of the

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to ball filling variation in the mill The results obtained from this work show the ball filling percentage variation is between 1 2– 3 7 which is lower than mill ball filling percentage according to the designed conditions 15 In addition acquired load samplings result for mill ball filling was 1 3

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respectively The mill was configured to operate as a RoM ball mill The experiments were conducted at varying mill speeds 75 85 critical speed feed rate kg/hr and ball loads 15 26 The static mill filling was determined from physical measurements after crash stopping the mill

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There are two factors which make extremely difficult to correlate experimentally torque and filling level in a ball mill One of them is a saturation effect appearing on torque as the mill filling increases The other factor is the effect of the gears always present to multiply the torque of the electric drive which smear torque signal with

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Hogg and Fuerstenau using an approximate model of the motion of the ball charge derived a simple equation relating mill power to mill dimensions speed of rotation and the ball filling level this model it was assumed that the charge consists of two distinct regions a static region where particles do not move relative to the mill shell and a shear zone where particles flow

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Method for verifying the filling level of coal in a ball mill Fontanille et al 241/30 Agitator mill Durr et al 241/46 17 Device for monitoring a ball grinder mathematical models are established with the following formulae

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The number of lifters of mill shell liners mill rotation speed and filling percentage of grinding media are three of the most important parameters influencing the charge behavior and the trajectory of ball motion inside the SAG mills and consequently their performance In this paper the milling operation of pilot scale SAG mills using the discrete element method DEM is investigated

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Usually plant operators use mill power readings as an indicator of ball filling degree and often try to keep it at the maximum level It is well known that the mill absorbed power depends on operating parameters other than ball level such as pulp density and liner configuration

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The question about modern intelligent information processing methods usage for a ball mill filling level evaluation is considered Vibration acceleration signal has been measured on a mill laboratory model for that purpose It is made with accelerometer attached to a mill pin The conclusion is made that mill filling level can not be measured with the help of such signal amplitude only

Chat Online### EFFECT OF PARTICLE FILLING AND SIZE ON THE

Figure 4 1 Photograph of the mill and the installation of inductive proximity probe 71 Figure 4 2 Photographs of the coarse and fine particles72 Figure 4 3 Variations in net power draw with particle filling at different mill speeds for a ball filling of 20 74 Figure 4 4 Inductive probe s signal ball

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At present the method for measuring the fill level which used the vibration signal of mill shell shows its advantage compared with other methods However this method is developed late and the technique for collecting the vibration signal from mill shell is immature In this paper a novel method for collecting the vibration data from mill shell is proposed

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Ball mills are extensively used in the size reduction process of different ores and minerals The fill level inside a ball mill is a crucial parameter which needs to be monitored regularly for optimal operation of the ball mill In this paper a vibration monitoring based method is proposed and tested for estimating the fill level inside a laboratory scale ball mill

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Chat Online### Efficiency and grinding media filling levelIEEE

Slide shoe supported mills eased those concerns and made possible the lowering of normal filling levels of 40 to 45 to a new normal of 28 to 35 Ten to fifteen years ago two events took place which seemed to support the results of the preliminary investigations of low level filling and efficiency In the first case one of the

Chat Online### Calculate Ball Mill Grinding Capacity

A Total Apparent Volumetric Charge Fillingincluding balls and excess slurry on top of the ball charge plus the interstitial voids in between the ballsexpressed as a percentage of the net internal mill volume inside liners B Overflow Discharge Mills operating at low ball fillingsslurry may accumulate on top of the ball charge causing the Total Charge Filling Level to be

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To ball filling variation in the mill the results obtained from this work show the ball filling percentage variation is between 12 37 which is lower than mill ball filling percentage according to the designed conditions 15 in addition acquired load samplings result for mill ball filling was 13

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Chat Online### EFFECT OF PARTICLE FILLING AND SIZE ON THE

Figure 4 1 Photograph of the mill and the installation of inductive proximity probe 71 Figure 4 2 Photographs of the coarse and fine particles72 Figure 4 3 Variations in net power draw with particle filling at different mill speeds for a ball filling of 20 74 Figure 4 4 Inductive probe s signal ball

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