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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

MoreMill Operating Work Index Calculator (Ball/Rod/SAG)

MoreDec 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

Moreball mill operatng work index calculation. ball mill bond work inde for line 2015-12-16 work indices for the AG/SAG mill and ball mill can be re-organised as 7 and 8 where B Wio and A Wio are the corrected operating work indices and WAG/SAG WBM are the 2015-12-16 work indices for the AG/SAG mill and ball mill can be re-organised as 7 and 8 where B Wio and A Wio are the corrected operating work

MoreOct 24, 2018· To calculate the operating work index of a circuit, you must measure four things: P: The power draw of the mill. This is usually calculated from the input leads to the motor, then multiplied by

MoreBond 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 profitability. Mill operators have long used operating

MoreThe 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

Morethe Bond mill operating under the Kinetic grinding test approach to estimate the ball mill work index a procedure for the calculation of the Bond work index is suggested for cases when the

MoreThis 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

MoreThe 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

Moreball 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 Sales Online

MoreFor 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.,

Moreball mill operatng work index effeciency. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including quarry, aggregate, and different kinds of minerals.

MoreBall Mill Work Index Calculationball 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 material.

MoreKolkata ball mill work index calculation xls. Ball mill operatng work index effeciency-bwi bond ball mill work index on sag ground ore, kwhton ground f 80 80 passing of sag ground of the test feed size, microns p 80 80 passing from the test product size, microns p cs bond closing screen size, microns g pb ball mill grindability average of last three cycles, grrev determination of the sag and

MoreThe 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). Ball Mill Work Index Calculation ra-warnecke.de. Ball Mill Work Index Calculation Xls .

MoreOperating Work Index Is Not The Specific Energy Consumption. Oct 24 2018 · The work index can either be measured in the laboratory the Bond ball mill work index determination is a common example or it can be calculated from the operating performance of

MoreThis 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

MoreSeveral types of ball mills exist. They differ to an extent in their operating principle. They also differ in their maximum capacity of the milling vessel, ranging from 0.010 liters for planetary ball mills, mixer mills, or vibration ball mills to several 100 liters for horizontal rolling ball mills.

Morerod mill work index has not been de ned as yet. 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

MoreOct 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

Morewhere CF is the Esliming calibration factor (in the Circuit Settings) for ball mill operating work index versus laboratory ball mill work index. A value of zero means use the Bond/Rowland SSBM formula to predict E ball, a value of -0.05 means use 5% less than Bond/Rowland SSBM formula to predict E ball. CF is a negative number if Wi O is less than

MoreThe Bond low-energy impact crushing work index (more informally, the Bond crushing work index) is not as common as the Bond ball mill work index, and it is a notoriously noisy test.. The test is a 'per-specimen' test where individual specimens of prepared rock are hand-picked by the test operator and placed into the apparatus.

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