Equation 1 is multiplied by the factor of 108 A multicompartment ball mill consists of two or more grate discharge ball mills in series The same equation is used to calculate the power that each ball mill compartment should draw The total power is the sum of the power calculated for each of the separate compartments

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

Ball Mill Charge Volume Calculation Pdf Calculation of the power draw of dry multicompartment ball mills 225 The mill load that is the volume of charge in the mill is the principal determinant of power draw Estimation of the ball load that is mixed with the cement charge is difficult and can be highly erroneous So direct measurement must be taken for calculation of mill load

Comparison of the ball mill power draw from the Denver slide rule and the proposed model Dashed line corresponds to y=x Figures uploaded by Konstantinos Tsakalakis

• Effective mill power draw • Ball mill specific grinding rate • Ball mill grinding efficiency The circuit output is defined as the production rate of fines by the circuit It is calculated from three values: 1 The dry ore feed rate to the circuit (t/h) 2 The % fines in

AG/SAG mills in the data base are up to 40ft in diameter and ball mills are up to 26ft in diameter The measured gross power draws from these mills are plotted against the model predictions in Figure 1 As indicated by this data base the accuracy of the

Ball Mill Design A survey of Australian processing plants revealed a maximum ball mill diameter of 524 meters and length of 884 meters (Morrell, 1996) Autogenous mills range up to 12 meters in diameter The lengthtodiameter ratios in the previous table are for normal applications For primary grinding, the ratio could vary between 1:1and

The power draw of the mill is then obtained by multiplying KWr by the tons of rods in the mill, which yields: KW = (πD²/4 L V pρ)(107 D34 (6354 Vp ))Cs(3) KW = mill power draw at the pinion shaft, kilowatts p = rod charge bulk density

Ball Mill Designpower Calculation Apr 08, 2018 A motor with around 1400 Horse Power is calculated needed for the designed task Now we much select a Ball Mill that will draw this power 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

Ball Mill Charge Volume Calculation Pdf Calculation of the power draw of dry multicompartment ball mills 225 The mill load that is the volume of charge in the mill is the principal determinant of power draw Estimation of the ball load that is mixed with the cement charge is difficult and can be highly erroneous So direct measurement must be taken for calculation of mill load

• Effective mill power draw • Ball mill specific grinding rate • Ball mill grinding efficiency The circuit output is defined as the production rate of fines by the circuit It is calculated from three values: 1 The dry ore feed rate to the circuit (t/h) 2 The % fines in

Ball mill power draw predicted from the Denver slide rule, kW 0 200 400 600 Calculated ballmill 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

Discrete element method simulations of a 1:5scale laboratory ball mill are presented in this paper to study the influence of the contact parameters on the charge motion and the power draw The position density limit is introduced as an efficient mathematical tool to describe and to compare the macroscopic charge motion in different scenarios, ia with different values of the contact parameters

cement ball mill throughput calculation calculate ball mill throughput in closed circuit Get more info of silica sand mining process equipment for Advanced process control for the cement industry

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)

Next we consider the ball mill (rock and ball) cases with smaller cutoffs The base case is our standard mill with a cutoff of 5 mm for the rock size This is compared to cases that are same except for the cutoff being reduced to 2 and 1 mm, respectively The specific power draw

This ball mill and rod mill power draw model is based on a torque model and empirical measurements made by the Equipment Company for use by its sales representatives to size grinding mills Slight differences in the equations used allow rod mills, dry ball mills and wet overflow and grate ball mills to be sized

2006) The laboratory benchscale SAG mill reproduces operating conditions of a commercial SAG mill, in a closed circuit dry grinding environment The ground product for the laboratory SAG mill is then submitted to the Bond ball mill work index test The number of SAG mill revolutions required to grind the material to a P

• Effective mill power draw • Ball mill specific grinding rate • Ball mill grinding efficiency The circuit output is defined as the production rate of fines by the circuit It is calculated from three values: 1 The dry ore feed rate to the circuit (t/h) 2 The % fines in

cement ball mill throughput calculation calculate ball mill throughput in closed circuit Get more info of silica sand mining process equipment for Advanced process control for the cement industry

mill test, the calculation method of the mill energy specific cumulative grinding rates is shown by the following example Using plant data, the value of E is the specific energy input to the solid material as it passes through the plant mill (the mill power draw divided by the mill

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)

balls which exist in mill, 𝐴𝑏: each ball abrasion (g), 𝐴t: total ball abrasion in the mill (g), 𝑣b: each ball volume (m3), 𝑓b: supposed ball filling percentage, A r: ball abrasion rate in the mill If above calculation were done again for 𝑓b = 2%, total ball abrasion will get 6096, finally

EFFECTS OF GRINDING MEDIA SHAPES ON BALL MILL PERFORMANCE Niyoshaka Nistlaba Stanley Lameck A dissertation submitted to the Faculty of

2006) The laboratory benchscale SAG mill reproduces operating conditions of a commercial SAG mill, in a closed circuit dry grinding environment The ground product for the laboratory SAG mill is then submitted to the Bond ball mill work index test The number of SAG mill revolutions required to grind the material to a P

The geometry of a mill with conical ends is shown in Figure 86 The total volume inside the mill is given by Vm 4 D2 mL 1 2(Lc L) L 1 (Dt/Dm) 3 1 Dt/Dm (816) The density of the charge must account for all of the material in the mill including the media which may be steel balls in a ball mill, or large lumps of ore in an

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