### Bond formula for the grinding balls size calculation

There is a mathematical solution to this problemthe Bond formula It uses to help determine the grinding media optimal size must be loaded into the ball mill for proper operation ensure The calculation formula is below Bthe grinding balls diameter mm Athe correction factor for grinding balls A = 20 17 for cilpence A = 18 15

Get Price### MILLING CONTROL OPTIMISATIONMintek

Mill Feed t/h Load t 300 1800 Power kW 250 200 150 100 50 0 1600 1400 1200 1000 800 600 400 200 MillStar OFF MillStar ON Mill Overloads Mill Feed Cuts DAY 1 DAY 2 DAY 3 DAY 4 Mill Feed PV Mill Feed SV Mill Load Power Figure 7 Mill Power Optimisation results for Case Study 1 Figure 8 Mill Power Optimisation results for Case Study 2

Get Price### Calculation of energy required for grinding in a ball mill

International Journal of Mineral Processing 25 1989 41 46 41 Elsevier Science Publishers B.V Amsterdam Printed in The Netherlands Calculation of Energy Required for Grinding in a Ball Mill N.M MAGDALINOVIC University of Belgrade Technical Faculty at Bor 19210 Bor S.F.R Yugoslavia Received June 9 1987 accepted after revision March 7 1988 ABSTRACT Magdalinovid N.M 1989.

Get Price### EFFECT OF BALL SIZE DISTRIBUTION ON MILLING

4.2 Effect of ball diameter on the selection function 55 4.3 Reduced selection function graph 56 4.4 Reduced cumulative breakage function 58 5.1 EQM and OEM ball mass size distributions used 64 5.2 EQM and OEM ball number size distributions used 65 5.3 EQM BSD graph as predicted with Equation 5.1 66

Get Price### How to Calculate and Solve for Specific Power of Mill

Now Click on Ball Mill Sizing under Materials and Metallurgical Now Click on Specific Power of Mill under Ball Mill Sizing The screenshot below displays the page or activity to enter your values to get the answer for the specific power of mill according to the respective parameters which is the Work Index of Ground Material w i 80 Product Size P 80 and 80 Feed Size F 80 .

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conventional crushing and grinding circuits crusher rod ball mill or crusher ball mill By the 1970s the application of conventional tended to be limited to relatively low capacities circuits The majority of modern grinding circuits include a SAG mill a ball mill and/or a

Get Price### A Method to Determine the Ball Filling in Miduk Copper

balls which exist in mill π΄π each ball abrasion g π΄t total ball abrasion in the mill g π£b each ball volume m3 πb supposed ball filling percentage A r ball abrasion rate in the mill If above calculation were done again for πb = 2 total ball abrasion will get 60.96 finally.

Get Price### Ball Mill Parameter Selection CalculationPower

1 Calculation of ball mill capacity The production capacity of the ball mill is determined by the amount of material required to be ground and it must have a certain margin when designing and selecting There are many factors affecting the production capacity of the ball mill in addition to the nature of the material grain size hardness density temperature and humidity the degree of

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Ball Mill Design/Power Calculation 12/12/2016 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 TheFor overflow ball mills the charge should not exceed 45 of the mill volume .

Get Price### Optimization of mill performance by using

Mill power 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 Figure 2 shows that there is no linear relation between

Get Price### CALCULATION OF BALL MILL GRINDING EFFICIENCY

calculation of ball mill grinding efficiency dear experts please tell me how to calculate the grinding efficiency of a closed ckt open ckt ball mill in literatures it is written that the grinding efficiency of ball mill is very less less than 10 please expalin in a

Get Price### Ball mill media optimizationMetcom Tech

Production rate mill power and CSE can be measured during a plant circuit survey The mill grinding rate of coarse material is then calculated At the circuit target P80 size this is the mill grinding rate of coarse material through the size of interest The objective is to maximize this rate The mill grinding efficiency can also be calculated by taking the ratio of the mill grinding rate over the material s grindability as measured in the lab Mill percent solids optimization has thusly been achieved McIvor et al 2000 For media sizing maximizing the mill grinding rate on a given ore is equivalent to maximizing the mill

Get Price### Calculation of energy required for grinding in a ball mill

The grinding product size P in a Bond ball mill which is given by the aperture size which passes 80 of the grinding product as a function of the aperture size of the test screen Pk can be expressed by the formula P= P k K 2 These functions for G and P enable us to calculate the value of Wi for any other size of grinding product if we know

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power requirements for circuits including SAG and ball mills The method required a proposed F 80 feed size to the SAG mill the final grind size and an estimate of the transfer size between the

Get Price### How to Calculate and Solve for Shaft Power Ball Mill

Now Click on Ball Mill Sizing under Materials and Metallurgical Now Click on Shaft Power under Ball Mill Sizing The screenshot below displays the page or activity to enter your values to get the answer for the shaft power according to the respective parameters which is the Mill Capacity Q and Specific Power of Mill E . Now enter the value appropriately and accordingly for the

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Now Click on Ball Mill Sizing under Materials and Metallurgical Now Click on Shaft Power ball mill length under Ball Mill Sizing The screenshot below displays the page or activity to enter your values to get the answer for the shaft power ball mill length according to the respective parameters which is the Value of C Volume Load Percentage J Critical Speed V cr Bulk Density s

Get Price### GROSS POWER CALCULATORSMC Testing

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 model 1 standard deviation is 4.6 How to Use the Model Inputs to the model are made in three windows viz Mill

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If the mill has cone ends the model automatically calculates the volume of the cone ends as well as the volume of balls/rock in the cone ends from the cylindrical section data that the user inputs.

Get Price### Ball Millsan overview ScienceDirect Topics

8.3.2.2 Ball mills The ball mill is a tumbling mill that uses steel balls as the grinding media The length of the cylindrical shell is usually 1β1.5 times the shell diameter Figure 8.11 The feed can be dry with less than 3 moisture to minimize ball coating or slurry containing 20β40 water by weight.

Get Price### CALCULATION OF THE POWER DRAW OF DRY

In this paper a new approach for the calculation of the power draw of cement grinding ball mills is proposed For this purpose cement grinding circuit data including the operational and design parameters were collected from 14 industrial ball mills ranging in diameters from 3.2 to 4.8 m The ball loads within the mills were measured by different methods proposed in the literature and power draw of each mill were calculated The results showed that power draw of the cement mills

Get Price### AMIT 135 Lesson 7 Ball Mills CircuitsMining Mill

Describe the components of ball mill Explain their understanding of ball mill operation Explain the role of critical speed and power draw in design and process control Recognize important considerations in ball mill selection Reading Lecture In ball mills steel balls or hard pebbles to break particle based on impact and attrition.

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Welcome to the page of the ball mill power calculators 11 calculators are available Bond power formula for monochamber mill 2 chambers mill and 3 chambers mill

Get Price### MODELING THE SPECIFIC GRINDING ENERGY AND BALL

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.

Get Price### Calculation of the power expended by a centrifugal rotary

Calculation of the power expended by a centrifugal rotary ball mill for the grinding of soft and brittle granular materials N I Pavlikov Chemical and Petroleum Engineering volume 16 pages 91β94 1980 Cite this article

Get Price### Ball Mill Design/Power Calculation

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

Get Price### Ball mill media optimizationMetcom Tech

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

Get Price### BALL MILL POWERPage 1 of 2

ball mill power dear experts we have a ball mill in combi mode for cement grinding roller press before the ball mill the supplier has given 28 grinding media filling with shaft power 2270 kw only ball mill size is 4.4 11 m grinding media size is max 30mm it is a monochamber mill designed to grind the roller press product.

Get Price### Formula Of Ball Millsledzikujacybern

Ball Mill Parameter Selection Amp Calculation Power Aug 30 2019 1 Calculation of ball mill capacity The production capacity of the ball mill is determined by the amount of material required to be ground and it must have a certain margin when designing and selecting.

Get Price### The power consumption calculation of a ball drum mill

Current methods of power consumption calculation of a mill drive do not allow determining the power consumption for ball drum mills with a cross longitudinal motion of the grinding media.

Get Price### O I SKARIN N O TIKHONOV CALCULATION OF THE

based on the calculation of the overall potential and kinetic ener gy of the ball charge during its motion inside the rotating mill The concluding section of the article offers empirical formulas to calculate idling and aggregate capacity of the mill main drive Key word semiautogenous milling modeling strength pro

Get Price### EFFECT OF BALL SIZE DISTRIBUTION ON MILLING

4.2 Effect of ball diameter on the selection function 55 4.3 Reduced selection function graph 56 4.4 Reduced cumulative breakage function 58 5.1 EQM and OEM ball mass size distributions used 64 5.2 EQM and OEM ball number size distributions used 65 5.3 EQM BSD graph as predicted with Equation 5.1 66

Get Price### How to Size a Ball Mill Design Calculator Formula

The power calculated on using equation 1 Bond 1961 Rowland and Kjos 1978 relates to 1 Rod millinga rod mill with a diameter of 2.44 meters inside new liners grinding wet in open circuit 2 Ball millinga ball mill with a diameter of 2.44 meters inside new liners grinding wet in open circuit.

Get Price### drive calculation for a ball milljsemzjitrni.cz

drive calculation for a ball mill operation drive calculation for a ball mill operation Nov 12 2013 ball mill power dear experts we have a ball mill in combi mode for cement grinding roller press before the ball mill the supplier has given 28 grinding media filling with shaft power 2270 kw only ball mill size is 4411 m grinding media size is max 30mm it is a monochamber mill designed to

Get Price### MODULE #5 FUNCTIONAL PERFOMANCE OF BALL

Effective mill power draw 24 Ball mill specific grinding rate 29 Ball mill grinding efficiency 33 Progress Review 1 39 PART IIFunctional Performance Analysis 43 equation for ball mill circuits Define and calculate the classification system efficiency of a ball mill circuit.

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mill is the energy consumption The power supplied to the mill is used primarily to lift the load medium and charge Additional power is required to keep the mill rotating 8.1.3 Power drawn by ball semi autogenous and autogenous mills A simplified picture of the mill load is shown in Figure 8.3 Ad this can be used to establish the essential

Get Price### Ball Mill Design/Power CalculationLinkedIn

Ball Mill Power Calculation Example A wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a size distribution of 80 passing ΒΌ inch 6350

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