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ball mill operatng work index calculation

A New Approach to the Calculation of Work Index and the . ... rod 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 …

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  • Ball Mill Design Power Calculation

    Dec 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 …

  • Bond Ball Mill Work Index Equation In Wills

    The FC Bond ball mill. Operating work index is not the specific energy consumption. Oct 24, 2018 The Work Index is a fitted coefficient to Bond's equation given in the picture above. The work index can either be measured in the laboratory (the Bond ball mill work index determination is. ball mill …

  • Ball mill media optimization Metcom Tech

    torque mill test is the mill energy input divided by the solids load. The energy specific cumulative grinding rate at each screen size is calculated from a torque-mill test as in the example that follows. Torque mill solids load during test: 11.25 kg (24.8 lb) of ball mill feed sample from plant survey. Sample is reconstituted with water to be

  • Model Bond Barratt SABC Models SAGMILLING.COM

    The ball mill oversize feed factor (EF 4 BM) is always calculated with the rod mill work index for the optimum feed size and the ball mill work index for EF 4 BM. The model assumes that the calculated value of E ssbm + the specified contingency is greater than the sum of E sag + E peb ; …

  • Technical Information SMC Testing

    Technical Information. The SMC Test is the most widely-used comminution test in the world for AG & SAG Mills, HPGRs and Crushers. The SMC Test was developed to provide a range of useful comminution parameters through highly controlled breakage of rock samples. Drill core, even quartered small diameter core is suitable.

  • Bond Grinding Circuit Efficiency

    Mill Ball Mill Closed circuit crushing to 16 mm Open circuit 8’ dia. rod mill to 1 mm Closed circuit 8’ dia. ball mill to P80 um The ore Test Work Index = Circuit Operating Work Index 9 The Standard Bond Circuit Coarse Ore Bins Fine Ore Bins Screen Crushing Screen Classification Rod Mill Ball Mill THIS IS THE REFERENCE BASIS FOR ALL WORK ...

  • Calculation Of Ball Mill Critical Speed

    Why is the Bond Ball Mill Grindability Test done the - Ejmpep.com. Mill Work Index which expresses the resistance of a material to ball milling. Read more formula for calculating the critical speed of a ball mill

  • gradient calculation ball for ball mills Mechanic

    calculation torgue for operating a ball mill tenic heavy. calculation torgue for operating a ball mill. 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 inch 6350 microns The required product size distribution is …

  • Calculate a Mill's Operating Work Index 911 Metallurgist

    Mar 14, 2015 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 – …

  • Operating 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 a milling ...

  • ball mill operatng work index calculation

    Ball Mill Operatng Work Index Calculation; Bond Work Index Formula-Equation 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

  • Application of Operating Work Indices in Autogenous

    [2], the operating work index (Wio) of an existing grinding circuit can be calculated, given known mill power draw, throughput, feed and product size distributions. kWh/t = Power applied per ton of feed to the grinding unit Wi = The standard Bond work index of the ore P 80 = The 80% cumulative passing size of the product in microns F 80

  • 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 m (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 index determination for the material size of interest, or by chaining individual work index calculations …

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