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Oct 24 2018 #183; 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 MODULE 5 FUNCTIONAL PERFOMANCE OF BALL
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 backcalculation
the 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
Bond Work Index Ball Mill Calculation Design And Safety The grinding jar for the bond index rod mill is 12 x 24 in size and has a waveshaped design at least 15 to 20 kg sample material is required to simulate a closed grinding circuit in a ball or rod mill the rod mill work index rwi is used for particle size determination in a size range from 25 mm down to 21 mm whereas ball mill work.
Bond Work Index FormulaEquation
ball mill operatng work index effeciency. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any sizereduction requirements including quarry, aggregate, and different kinds of minerals.
12/12/2016#0183;#32;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 #188; inch (6350...
Roller Mill Operatng Work Index Calculation. Ball Mill Design/Power Calculation. #183; 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 andget price
= Provided by data from the standard Bond ball work index test using the following equation (Morrell, 2006): ( ) M 80 ( ) 80 1 80. 80 18. 18 ib f p P Gbp p f. f f (6) where . M. ib = fine ore work index (kWh/tonne) P. 1 = closing screen size in microns . Gbp = net grams of screen undersize per mill revolution . p. 80 = 80% passing size of the product in microns . f 80
Ball mill work index adjustment. The Bond ball mill work index test requires the operator to select an appropriate screen size to quot;closequot; the test. The procedure states that the closing screen size should be such that the product size of the test is the same as the expected product size of the operating plant.
24/10/2018#0183;#32;The operating specific energy consumption is first calculated from E = P #247; (t/h) Then rearrange the Bond equation so that you are solving for Wi :
14/3/2015#0183;#32;Use this online formula to calculate a Ball Mill, Rod Mill or SAG Mill Operating Work Index. Based on Fred Bonds 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
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
The ball mill work index laboratory test is conducted by grinding an ore sample prepared to passing mm (6 mesh) to product size in the range of 45150 #181;m (325100 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 index determination for the material size of interest, or by
The ball mill work index is con rmed at 16 kWh/t. The operating work index, though, is in the range of 21 kWh/t to 25 kWh/t showing high inef ciency. This raises the point that, in some cases, the Bond EF4 oversize factor calculation is not suf cient to compensate for the milling inef ciencies that arise.
1/1/2017#0183;#32;the 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
Ball Mill Operatng Work Index Calculation; Bond Work Index FormulaEquation Basic EquationsSize Distribution and Exposure RatioEquations For Work Index VariationsWork Index and Crack Energy The 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
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