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### Best way to determine the ball-to-powder ratio in

The maximum power draw in ball mill is when ball bed is 35-40 % by volume in whole empty mill volume. Considering that ball bed has a porosity of 40 %, the actual ball volume is considered to be

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Orway Mineral Consultants Canada Ltd. Mississauga, ON., L4W 5N5, Canada ABSTRACT Orway Mineral Consultants Ltd (OMC)as a consultancy has speciali zed in comminution circuit design for over 30 years. OMC Power Model is OMC'sThe in-house software for specific grinding energy power-based circuit calculations. The model uses ore hardness parameters from testwork,

Get Price### Calculation of energy required for grinding in

The Bond work index, W i, as an indicator of the grindability of raw materials is not a material constant but rather it changes with change of size of the grinding product.Therefore, in practice we can expect some difficulties and errors when the energy consumption is determined according to this formula in the case when, for a given size of grinding product, the value of the work index W i

Get Price### Ball Mill Design/Power Calculation

Ball Mill Power Calculation Example #1. 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 ¼ inch (6350 microns). The required product size distribution is to be 80% passing 100 mesh (149 microns). In order to determine the power requirement, the steps are as follows: Example Calculation. A motor with

Get Price### Milling Speed and Feed Calculator -

Milling Speed and Feed Calculator. Determine the spindle speed (RPM) and feed rate (IPM) for a milling operation, as well as the cut time for a given cut length. Milling operations remove material by feeding a workpiece into a rotating cutting tool with sharp teeth, such as an end mill or face mill. Calculations use the desired tool diameter, number of teeth, cutting speed, and cutting feed

Get Price### Milling formulas and definitions -

A material constant which is a factor used for power calculations, expressed in N/mm2. Machining time, T c (min) Machining length (l m) divided by the table feed (v f). Net power, P c and efficiency, η mt. Machine tool oriented values, which assist in calculating the net power to ensure that the machine can handle the cutter and operation.

Get Price### Milling Formulas and Worksheet - YouTube

17.12.2015· Calculating Cutter RPM, Table Feed, Cuting Time, and Metal Removal Rate.

Get Price### GROSS POWER CALCULATOR - SMC Testing

GROSS POWER CALCULATOR General . This model uses the equations from Morrell's 1993 PhD thesis: "The Prediction of Power Draw in Wet Tumbling Mills". The model is also described in detail in the book "Mineral Comminution Circuits Their Operation and Optimisation" which is available from the Julius Kruttschnitt Mineral Research Centre. The model predicts the gross power, which is also

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

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. Although, Bond's method has been widely used, the required link to classification is missing. Therefore, it is not possible to calculate circuit performance when any of the design and operational parameters are changed (Napier-Munn et. al

Get Price### CALCULATION OF BALL MILL GRINDING

08.03.2013· 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 n excel sheet to calcualte the same. thanks. sidhant. reply

Get Price### TECHNICAL NOTES 8 GRINDING R. P. King - Mineral Tech

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 POWER - Page 1 of 2

12.11.2013· 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 4.4*11 m. grinding media size is max 30mm . it is a monochamber mill designed to grind the roller press product. if we calculate the shaft power with 28% filling it comes

Get Price### Ball Mill For Limestone Grinding Power

Ball Mill For Limestone Grinding Power Calculation. Ball Mill For Limestone Grinding Power Calculation. Mill type overview three types of mill design are common the overflow discharge mill is best suited for fine grinding to 75 106 microns the diaphram or grate discharge mill keeps coarse particles within the mill for additional grinding and typically used for grinds to 150 250 microns the

Get Price### Ball Mill Design/Power Calculation - LinkedIn

12.12.2016· 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 ¼ inch (6350

Get Price### calculation of ball mill - pastoriezelem.be

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 ¼ inch (6350 microns). Chat Online; Calculation of energy required for grinding in a ball mill . Calculation of energy required for grinding in a ball mill. Int. J. Miner. Process. 25 41-46. The Bond work index Wi as an

Get Price### Application of Operating Work Indices in Autogenous

Ball Mill Wio, BWio 8.6 Circuit Wio, OWio 14.6 Bond Ball Mill Work Index, BWi, kWh/t 13.4 Bond Rod Mill Work Index, RWi, kWh/t 18.1 Table 1. Example of AG/SAG Ball Mill Circuit Wio Calculations [1] [2] ABstrAct Optimum use of power in grinding, both in terms of grinding efficiency and use of installed capital, can have a large effect on

Get Price### Mill sizing method - thecementgrindingoffice.com

Please find below two calculators for sizing mills using the Bond and Rowland methods: Ball mill sizing: Calculator for ball mill(s) in a single stage circuit. Rod ball mill sizing: Calculator for rod mill(s) as first stage of the circuit and ball mill(s) as second stage of the circuit.

Get Price### Mill sizing method - thecementgrindingoffice.com

Please find below two calculators for sizing mills using the Bond and Rowland methods: Ball mill sizing: Calculator for ball mill(s) in a single stage circuit. Rod ball mill sizing: Calculator for rod mill(s) as first stage of the circuit and ball mill(s) as second stage of the circuit.

Get Price### Formulas and CalCulation examples - Pokolm

Calculation of feed per min. in [mm/min.]: Calculation of power require-ment in [kW]:* Calculation of cutting speed in [m/min]:* Calculation of machining time in [min]: Calculation of machining time in [min]: Calculation of chip volume in [cm3/min]: * please note: For flat contours use true mill diameter to calculate cutting

Get Price### how to calculate power consumption in ball mill

TECHNICAL NOTES 8 GRINDING R P King Mineral Technologies, ball mill power calculation,Figure 85 Effect of mill filling on power draft for ball mills The data, A simple equation for calculating net power draft is, Austin's formula gives slightly higher values than Morrell's for mills that have length equal Power Consumption

Get Price### [Hindi] Ball Mill, Hammer mill & Critical speed

07.03.2018· Types of GRINDER IN HINDI, Hammer mill, Ball mill & Critical speed of Ball mill -~-~~-~~~-~~-~- Please watch: "Introduced " Crushers

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