• Bond Work Index Formula-Equation

    Basic EquationsSize Distribution and Exposure RatioEquations For Work Index VariationsWork Index and Crack EnergyThe basic index equation is:W = 10 Wi/√P  10 Wi/√F(1)where W is the input required in kilowatt hours per short ton to grind from 80% passing F microns to 80% passing P microns, and Wi is the index, or the grinding resistance parameter. It represents the energy input required in kilowatt hours to reduce a short ton from theoret在911metallurgist上查看更多信息
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    Relationships between comminution J energy and product . The standard Bond ball mill grindability test is a closed circuit dry grinding test with a 250 circulating load The standard procedural outline of the test is stated in Bond 1961 The index for a ball mill Wi is then calculated from the following equation 7 where P is the closing sieve size m Gbp is the grindability

  • Ball Mill Design/Power Calculation

    2020-5-18  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

  • Standard Bond Ball Mill Grindability Test Method

    2020-5-15  Here is the old Allis-Chalmers Bond Work Index Grindability Test Procedure. The standard feed is prepared by stage crushing to all passing a 6 mesh sieve, but finer feed can be used when necessary. It is screen analyzed and packed by shaking in a 1000-cc graduated cylinder, and the weight of 700 cc is placed in the mill and ground dry at 250 per cent circulating load. The mill is 12 in. x 12

  • Bond Work Index Procedure and Method

    2020-5-18  This Grindability Test or Bond Ball Mill Work Index Procedure is used to determine the Bond Work Index of minus six mesh or finer feed ore samples. These equation application methods are used to process <1/2″ ore samples in a Ball Mill using a standard ball charge.. Below describes in general terms the Bond Work Index Procedure used by a Professional Metallurgical Testing Laboratory.

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  • Standard Grindability Tests and Calculations

    2016-4-1  Standard Grindability Tests and Calculations (New York Meeting. February 1943) SINCE the last publication of tabulated results of grindability tests by the authors1 the total number of ball-mill tests made has more than doubled, and rod-mill tests have becomeincreasingly important. Nearly all of the standard closed-circuit ball-mill

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    Alternative Approaches for Determination of Bond Work Index on the HGI values, grinding of fine grain samples involved. approach, is Bond's grindability test and the second one is Hardgrove index, which generally used for coal.In recent, the brittleness test/friability value of bauxite, limestone, barite, These studies were carried out in a standard ball mill 300 mm X 300 mm size.

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