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ball mill work index calculation xls

Bond Work Index Formula-Equation

Basic EquationsSize Distribution and Exposure RatioEquations For Work Index VariationsWork Index and Crack EnergyThe basic work index equation is:W = 10 Wi/√P – 10 Wi/√F(1)where W is the work input required in kilowatt hours per short ton to grind from 80% passing F microns to 80% passing P microns, and Wi is the work index, or the grinding resistance parameter. It represents the energy input required in kilowatt hours to reduce a short ton from theoretSee more on 911metallurgist

ball mill work index calc xls Pochiraju Industries Ltd

Bond Rod Mill, Ball Mill, and Crushing Work Index tests have been studied for years to (other than Excel) or a data base. of calculation instead of simulation with other ores has eliminated mistakes caused by comparing ores with different.

Calculate a Mill's Operating Work Index

Use this online formula to calculate a Ball Mill, Rod Mill or SAG Mill Operating Work Index. Based on Fred Bond’s work you can estimate the energy used into your grinding circuit. This is the most accurate and informative method, but much of the data necessary for its application is not yet available. A) Total Apparent Volumetric Charge Filling including balls and excess slurry on top of

Starkey & Associates Inc. Leaders in Comminution Design

= SAG mill feed sample mass, grams The ball mill pinion energy is determined from the Bond the Third Theory of Comminution : S d-BWI = 1.102 * 44.5 (P cs 0.23 G pb 0.82) (10 P 80 1/2 10 F 80 1/2) where : S d-BWI = Bond ball mill work index on SAG ground ore, kWh/ton ground F 80 = 80% passing of SAG ground of the test feed size

ball mill work index calculation xls ME Mining Machinery

Xls ore grinding mill caculations wpaworg.Ball mill design xls 80-100tph stone crushing production line,ore,database,ball mill work index calculation xls quarry grinding plantball mill design calculation xls and pdf file pressure vessel,grinding mill design,.Read more.Move india chrome ore

ball mill work index calculation

Ball Mill Work Index Calculation-ball Mill. A New Approach To The Calculation Of Work Index And. Ball mill batch process the mill dimensions d l are 0204 0158 m and it is loaded with 65 kg steel balls between 25 and 32 mm in diameter the mill rotates on rolls and its frequency is a new approach to the calculation of work index and the potential energy of a particulate materialget price

Correction of Bond Ball Mill Work Index Test for Closing

This is because work index frequently changes as a function of the product size in comminution. If target grind size during a project is changed, or if the test is run at the wrong product size, then it is necessarily to provide a correction. The goal of this work is to create an equation to adjust a Bond ball mill work index from one P 80 basis

How to Size a Ball Mill -Design Calculator & Formula

A) Total Apparent Volumetric Charge Filling including balls and excess slurry on top of the ball charge, plus the interstitial voids in between the balls expressed as a percentage of the net internal mill volume (inside liners). B) Overflow Discharge Mills operating at low ball fillings slurry may accumulate on top of the ball charge; causing, the Total Charge Filling Level to

A Method of C alculating Autogenous/ Semi-Autogenous

The ball ﬁ mill work index is con rmed at 16 kWh/t. The operating ﬁ work index, though, is in the range of 21 kWh/t to 25 kWh/t showing high inefﬁ ciency. This raises the point that, in some cases, the Bond EF4 oversize factor calculation is not suf cient to compensate ﬁ for the milling inef ciencies that arise.

Ball Mill Design/Power Calculation

The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, Bond Work Index, bulk density, specific density, desired mill tonnage capacity DTPH, operating % solids or pulp density, feed size as F80 and maximum ‘chunk size’, product size as P80 and maximum and finally the type of circuit open/closed

ball mill work index calc xls Pochiraju Industries Ltd

Bond Rod Mill, Ball Mill, and Crushing Work Index tests have been studied for years to (other than Excel) or a data base. of calculation instead of simulation with other ores has eliminated mistakes caused by comparing ores with different.

ball mill operatng work index calculation

Work Index spreadsheet was designed to estimate the Operational Work Index of a given grinding installation of known dimensions and operating conditions, of the operational response of conventional ball mills in various grinding circuits. data (whenever available) from back-calculation

Bond Work Index an overview ScienceDirect Topics

The ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100% passing 3.36 mm (6 mesh) to product size in the range of 45-150 µm (325-100 mesh), thus determining the ball mill work index (Wi B or BWi). The work index calculations across a narrow size range are conducted using the appropriate laboratory work

Ball Mill Work Index Calculation ra-warnecke.de

Ball Mill Work Index Calculation Xls . Ball Mill DesignPower Calculation The basic parameters used in ball mill design power calculations rod mill or any tumbling mill sizing are material to be ground characteristics Bond Work Index bulk density specific density desired mill tonnage capacity DTPH operating solids or pulp density feed size as F80 and maximum.

ball mill work index calculation

ball mill work index calculation xls. Ball Mill Design/Power Calculation. 2020-6-25 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).get price

(PDF) A quick method for bond work index approximate value

The Bond work index, Wi, is defined in a Bond ball mill on the samples of standard size − 3.327 + 0 mm. a procedure for the calculation of the Bond work index is suggested for cases when the

Correction of Bond Ball Mill Work Index Test for Closing

This is because work index frequently changes as a function of the product size in comminution. If target grind size during a project is changed, or if the test is run at the wrong product size, then it is necessarily to provide a correction. The goal of this work is to create an equation to adjust a Bond ball mill work index from one P 80 basis

Bond Work Index (Energy equation) Grinding

Hello Everyone, I am dealing with the calculation of Bond Work Index. The flowsheet is attached. I have calculated primary ball mill bond index but for the calculation of second ball mill bond index I got trouble. In a bond energy equation, where should I select tonnage ? and where should I pick

AMIT 135: Lesson 7 Ball Mills & Circuits Mining Mill

For overflow ball mills, the charge should not exceed 45% of the mill volume . For grate discharge mills, the charge should occupy about 50% of the mill volume . Bond developed a relationship that can be used to determine the percent charge by volume as a function of the vertical height above the charge, He, and the radius of the mill, R, i.e.,

SAGMILLING.COM .:. tools_millfilling

Mill Volume Filling Calculation. you may have 29 rows exposed at the discharge end of the mill, and only 28 exposed at the feed end. If so, enter 28.5 for the number of exposed lifters. Calculated Mill Charge: Feel free to download them for use in your own work subject to the disclaimer! MillFillingCalc.pdf MillFillingCalc.ods

AMIT 135: Lesson 6 Grinding Circuit Mining Mill Operator

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.

Bond formula for the grinding balls size calculation

Oct 19, 2017· — Past experience of a ball mill. It is possible to calculate the grinding media average diameter formed in the mill operation, during grinding media unload from mill (the grinding balls bulk weight in fully unloaded mill). — Other enterprises. It is possible to obtain the necessary data on a grinding media granulometric composition from

Ball Mill Work Index Calculation ra-warnecke.de

Ball Mill Work Index Calculation Xls . Ball Mill DesignPower Calculation The basic parameters used in ball mill design power calculations rod mill or any tumbling mill sizing are material to be ground characteristics Bond Work Index bulk density specific density desired mill tonnage capacity DTPH operating solids or pulp density feed size as F80 and maximum.

Starkey & Associates Inc. Leaders in Comminution Design

= SAG mill feed sample mass, grams The ball mill pinion energy is determined from the Bond the Third Theory of Comminution : S d-BWI = 1.102 * 44.5 (P cs 0.23 G pb 0.82) (10 P 80 1/2 10 F 80 1/2) where : S d-BWI = Bond ball mill work index on SAG ground ore, kWh/ton ground F 80 = 80% passing of SAG ground of the test feed size

A New Approach to the Calculation of Work Index and the

Ball Mill Batch Process The mill dimensions, (D × L), are 0.204 × 0.158 m and it is loaded with 6.5 kg steel balls between 25 and 32 mm in diameter. The mill rotates on rolls and its frequency is A New Approach to the Calculation of Work Index and the Potential Energy of a Particulate Material

Excel Sheet For Ball Mill Calculations

You can also perform table tennis ball calculations using my Table Tennis Ball Speed Calculator or my Ball Speed Calculator. I used the Excel(tm) spreadsheet to calculate an average speed of 58.9 mph. Read more. What size stepper motor do I-need. mycncuk Bond Rod Mill, Ball Mill, and Crushing Work Index tests have been studied for

ball mill operatng work index calculation

Work Index spreadsheet was designed to estimate the Operational Work Index of a given grinding installation of known dimensions and operating conditions, of the operational response of conventional ball mills in various grinding circuits. data (whenever available) from back-calculation

Ball Mill Finish Calculator Martin Chick & Associates

Ball Mill Finish Calculator. The Ball Mill Finish Calculator can be used when an end mill with a full radius (a ball mill) is used on a contoured surface. The tool radius on each side of the cut will leave stock referred to as a scallop. The finish of the part will be determined by the height of the scallop, amd the scallop will be determined

AMIT 135: Lesson 7 Ball Mills & Circuits Mining Mill

For overflow ball mills, the charge should not exceed 45% of the mill volume . For grate discharge mills, the charge should occupy about 50% of the mill volume . Bond developed a relationship that can be used to determine the percent charge by volume as a function of the vertical height above the charge, He, and the radius of the mill, R, i.e.,

SAGMILLING.COM .:. tools_millfilling

Mill Volume Filling Calculation. you may have 29 rows exposed at the discharge end of the mill, and only 28 exposed at the feed end. If so, enter 28.5 for the number of exposed lifters. Calculated Mill Charge: Feel free to download them for use in your own work subject to the disclaimer! MillFillingCalc.pdf MillFillingCalc.ods

AMIT 135: Lesson 6 Grinding Circuit Mining Mill Operator

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.

Optimization and Performance of Grinding Circuits: The

of the cyclone underflow back to SAG mill, introduction of a second classification stage as well as introduction of a second ball mill. The evaluation of breakage tests and survey data revealed the following; the Bond work index obtained for the current ore ranges between 17.20

Bond formula for the grinding balls size calculation

Oct 19, 2017· — Past experience of a ball mill. It is possible to calculate the grinding media average diameter formed in the mill operation, during grinding media unload from mill (the grinding balls bulk weight in fully unloaded mill). — Other enterprises. It is possible to obtain the necessary data on a grinding media granulometric composition from

USING THE SMC TEST® TO PREDICT COMMINUTION CIRCUIT

However, in this situation the ball mill has to supply this energy and it has a different (higher) work index than the crusher (ie the ball mill is less energy efficient than a crusher and has to input more energy to do the same amount of size reduction). Hence from equation 7, to crush to the ball mill

O. I. SKARIN N. O. TIKHONOV CALCULATION OF THE

10 mm), the crushing work index SWI is applicable; for me-dium size particles (from 100 mm to 2100 μm) — rod milling work index RWI; for finer particles — ball milling work index BWI (Table). These indexes are readily obtained using the special-purpose laboratory equipment (Fig. 1). Finding the total specific energy consumption

Pontificia Universidad Católica de Chile

The Bond_Op. Work Index spreadsheet was designed to estimate the Operational Work Index of a given grinding installation of known dimensions and operating conditions, based on the traditional Bond's Law and the Hogg & Fuersteneau Power Model (see Mill Power_Ball Mills spreadsheet for further details on such model).