bond work index of limestone mill rotation calculation

bond work index of limestone mill rotation calculation

bond work index of limestone mill rotation calculation
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bond work index of limestone mill rotation calculation Bond Mill Work Index For Limestone Bond Work Index Of Limestone Mill Rotation Calculation Bond work ind

bond work index of limestone mill rotation calculation

  • bond work index of limestone mill rotation calculation

    Bond Mill Work Index For Limestone Bond Work Index Of Limestone Mill Rotation Calculation Bond work index procedure and 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 Read More Techniques for Determining Limestone Composition and Please contact [ protected] or call 8887075814 (MBond s Law work required using a largesize feed is proportional to the square root of the The work index for limestone is 1274 kW P D mm D mm m pb pa 1696) 508 1 3175 1 of this 20kW is needed to operate the empty mill The feed rate is at 150 ton/hr Calculate the power required for the second operation using a)bond work index of limestone mill rotation calculationThe Bond work index determination according to the standard Bond's test is done on all these samples with comparative sieve size of 74, 105 and 150 microns The Bond Work Index is calculated using the formula (Bond, 1961): (√ √) (1) where: W i – Bond work index (kWh/t); P c – test sieve mesh size (µm); G – weight of the test sieve fresh unTHE BOND WORK INDEX OF LIMESTONE AND ANDESITE MIXTURES

  • Determination of Bond Work Index of Lucky Cement Limestone

    The study is focused on comminuting behavior of limestone and calculation of energy requirements for the effective production of ultrafine particle up to mesh liberation at Lucky Cement Limited In this regard calculation of work index of limestone made by standard Bond grindability test Ball mill was employed to conduct the grinding test of seven different samples Among all seven samples collected fromThe Bond work index and the grindability index can therefore be estimated from the friability value, which can be determined more rapidly than from the Bond test(PDF) The Bond work index of limestone and andesiteThis Table of Ball Mill Bond Work Index of Minerals is a summary as tested on ‘around the world sample’ You can find the SG of each mineral samples on the other tableTable of Bond Work Index by Minerals

  • QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE VALUE

    grinding cycles The Bond Work Index is calculated using the formula: 𝑖=1,1 44,5 𝑃𝑐 0,23𝐺,82(10 √𝑃80 −10 √𝐹80) (1) where W i – Bond work index (kWh/t) P c – test sieve mesh size (µm) G – weight of the test sieve fresh undersize per mill revolution (g/rev) F 80 – sieve mesh size passing 80% of the feed before grinding(µm) P 80The Hardgrove index is determined using the ASTM method D 409–71 It involves grinding 50g of the material, eg coal, of specified size (16–30 mesh cut) in a specified ballandrace mill for 60 revolutions The amount of 200 mesh material is measured ( w grams) and the index is defined as I = 13 + 693 wBond Work Index an overview | ScienceDirect Topics· The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test Its value constitutes ore characteristic and is(PDF) A quick method for bond work index approximate

  • calculation of limestone usage using ball mill scales

    bond ball mill index test jktech the bond ball mill work index can be used in the design calculations and simulations using jksimmet of a new grinding circuit Get Price ; axial transport in dry ball mills csiro cfd and limestone from 10 100 mm feed sizes down to sub millimetre product they are typically rotating cylinders with diameters from 3 6 m and lengths from 6 12 m the flow ofThis paper presents the experimental results of the Bond work index values obtained by the standard method on limestone and andesite samples, as well as composite samples made up from these ore in different weight ratios Comparatively are shown the Bond work index values that are obtained by the mass fraction of components that make up the composite samples calculation and their differences[PDF] The Bond work index of limestone and andesitebond work index of limestone mill rotation calculation For every bond ball mill work index test carried out at jktech, a standard report is issued the report details the bond test procedure method, and presents the results including f, p, grindability and work index further interpretation of the results is available if required frequently asked questions bond ball mill work indexGet Morebond work index of limestone mill rotation calculation

  • A New Approach to the Calculation of Work Index and the

    The work index W i was defined by F Bond as the specific energy (kWh/ton) required to reduce a particulate material from infinite grain size to 100 microns The calculation is based on the sizeenergy relationship 1,2 21 11 nn eC x , which for n = 05, x 1 = ∞ and x 2 = 100, by definition gives e ∞,100 = W i and consequently C = 10 W i In theory, for a given· EXPERIMENTAL WORK Experiments carried out on samples of copper ore, andesite and limestone determined the value of Wi in a laboratory Bond ball mill with different aper tures of test screen Table I shows the values of Wi with the corresponding numerical values for Pk, P, F and G Fig 1 shows the relation G=f(~~k) using the data from Table I The rec TABLE I Values of the work indexCalculation of energy required for grinding in a ball millThe Bond's standard ball mill is used to determine the work index value of differ ent samples The Bond work index is defined as the kilowatthours per short ton required to break from infinite size to a product size of 80% passing 100 µm If the breakage characteristics of a material remain constant over all size ranges, the calcul ated work index would be expected to remain constant sinceCORRELATION BETWEEN BOND WORK INDEX AND

  • AMIT 135: Lesson 7 Ball Mills & Circuits – Mining Mill

    Speed of mill rotation; Mill diameter; Mineral density; Work Index Bond estimated the amount of wear in terms of kilograms per kWh based on the abrasion index, A;, ie, Wet Ball Mill = kg kWh = 016(A i0015) 033; Dry Ball Mill = kg / kWh = 0023A i 05; Replacement Ball Size Rowland and Kjos proposed the use of their equation for the determination of the initial and replacement mediaThis was achieved by using Bond’s equation to calculate the specific and shaft powers required to drive the mill at the specified capacity, and also to size the mill After the fabrication of the ball mill, grinding test was conducted with the mill, using limestone as the feed material This was followed by the particle size analysis of the ground product from the mill in order to determineDesign, Construction and Performance Analysis of a 5Using the Bond Index test procedures it is possible to calculate crushing / abrasion behavior of mineral samples This knowledge is essential to define the required ball mill layout and production capacity In order to perform the Bond Index Test successfully it is necessary to use precrushed sample material as defined below: Module Ball Mill Minerals precrushed to < 335 mm and sievedBond Index Ball Mill / Rod Mill BT 100 XL RETSCH

  • Techniques for Determining Limestone Composition

    · Please contact [email protected] or call 8887075814 (M – Th 9 am – 5:30 pm and F 9 am – 3 pm ET) , to start a free trial, get pricing information, order a reprint, or post anThe work index W i was defined by F Bond as the specific energy (kWh/ton) required to reduce a particulate material from infinite grain size to 100 microns The calculation is based on the sizeenergy relationship 1,2 21 11 nn eC x , which for n = 05, x 1 = ∞ and x 2 = 100, by definition gives e ∞,100 = W i and consequently C = 10 W i In theory, for a givenA New Approach to the Calculation of Work Index and theUsing the Bond Index test procedures it is possible to calculate crushing / abrasion behavior of mineral samples This knowledge is essential to define the required ball mill layout and production capacity In order to perform the Bond Index Test successfully it is necessary to use precrushed sample material as defined below: Module Ball Mill Minerals precrushed to < 335 mm and sievedBond Index Ball Mill / Rod Mill BT 100 XL RETSCH

  • AMIT 135: Lesson 7 Ball Mills & Circuits – Mining Mill

    Speed of mill rotation; Mill diameter; Mineral density; Work Index Bond estimated the amount of wear in terms of kilograms per kWh based on the abrasion index, A;, ie, Wet Ball Mill = kg kWh = 016(A i0015) 033; Dry Ball Mill = kg / kWh = 0023A i 05; Replacement Ball Size Rowland and Kjos proposed the use of their equation for the determination of the initial and replacement mediaClosed 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 INDEX EFFICIENCY DETERMINATIONS! 10 2/20/2014 6 Example SAGBall Mill Circuit WI Efficiency Calculation • SAGball circuit F80 =Bond Grinding Circuit EfficiencyWhat is the power required to crush 100 ton/h of limestone if 80% of the feed pass a 2in screen and 80% of the product a 1/8 in screen? Solution: The work index for limestone is 1274 kW P D mm D mm m pb pa 1696) 508 1 3175 1 100 * 03162 *1274(The power required is : 0125 * 254 3175 2 * 254 508 100 ton/h P m 03162W i 1 D pb 1 D paSIZE REDUCTION Universiti Teknologi Malaysia

  • 3 Grinding Media size formula doeringsinnde

    The media sizing formula of Bond is the proven calculation to confirm the required media size B Ø (mm) = 2017 · C Ø (mm) = 1815 · B ball diameter in (mm) C Cylpebs diameter in (mm) F size of mill feed in micron, 80 % of new mill feed passing Wi Bond Work Index (KWh/t) Cs per cent of critical mill speed (%) S specific gravity of mill feed (g/cm3) D inside mill diameter (m) K· Please contact [email protected] or call 8887075814 (M – Th 9 am – 5:30 pm and F 9 am – 3 pm ET) , to start a free trial, get pricing information, order a reprint, or post anTechniques for Determining Limestone Composition Thus, the test work index value multiplied by the product of the correction factors will provide an estimate of the true (plant) work index value (342) W i = W i TEST × F 1 × F 2 × ⋯ × F 7 × F 8 Factors for condition not applicable should be taken as 1 The Bond work index value changes with the sieve size chosen during a particular testBond Work Index Value For Line Crusher

  • PROCESS ANALYSIS AND ENERGY EFFICIENCY IMPROVEMENT ON

    PORTLAND LIMESTONE CEMENT GRINDING CIRCUIT by Sixto Humberto Aguero BS (M echanical Engineering), Universidad Nacional Autonoma de Honduras, 1992 MASc (Ene rgy Management), New York Institute of Technology, 2008 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in THE FACULTY OFthat is used has come from a Bond ball mill work index test that has generated a similar value to that input to the “Tumbling mill circuit product P80 final grind” field If this is not the case the resultant specific energy prediction accurate might be compromised wwwsmctesting 4 Figure 1 – Measured vs Predicted Specific Energy for Crushers Figure 2 – Measured vs PredictedSPECIFIC COMMINUTION ENERGY SMC Testing