Ball Mill Operatng Work Index calculation

  • Ball Mill Design/Power Calculation

    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/closedCalculate 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 including balls and excess slurry on top of

  • Application of Operating Work Indices in Autogenous

    Bond 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 operatingOperating work index is not the specific energy ,24/10/2018· 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

  • ball mill operatng work index calculation

    ball mill work index calculation xls tuinmachinesofferte.nl. 2018-02-20 using Bond rod mill work index (RMWI), and Bond ball mill work index (BMWI). However, the author has developed a relationship between the Bond third theory SE values parameters are inputted for the speci c power calculation.JKTech Laboratory Services JKTech JKTech,JKTech Laboratory Services Bond Ball Mill Index Test (BRMWI) A Bond Ball Mill Index Test (BBMWI) is a standard test for determining the Ball Mill Work Index of a sample of ore. The BBMWI is a measure of the resistance of the material to crushing and grinding. It can be used to determine the grinding power required for a given throughput of material under ball mill grinding consitions. JKTech

  • Ball Mill Design/Power Calculation LinkedIn

    12/12/2016· 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 How to Size a Ball Mill -Design Calculator & , A) Total Apparent Volumetric Charge Filling including balls and excess slurry on top of the ball charge, plus the interstitial voids in between the balls expressed as a percentage of the net internal mill volume (inside liners). B) Overflow Discharge Mills operating at low ball fillings slurry may accumulate on top of the ball charge; causing, the Total Charge Filling Level to

  • (PDF) A quick method for bond work index

    The Bond work index, Wi, is defined in a Bond ball mill on the samples of standard size − 3.327 + 0 mm. In practice, it is possible to find materials of non-standard size that are finer than 3ball mill work index calculation nuernberg ,Note that the ball mill operating work index is applied only on the portion that needs the additional grinding (Q2), Get More. Ball Mill Design/Power Calculation LinkedIn . The standard Bond ball mill grindability test determines the ore grindability g rev−1 and work index on an ore which gives the ball mill power consumption. Ball Mill Work Index Ball Mill Manufacturer from Chennai. It is

  • MODELING THE SPECIFIC GRINDING ENERGY AND BALL-MILL

    MODELING THE SPECIFIC GRINDING ENERGY AND BALL-MILL SCALEUP K. G. Tsakalakis & G.A. Stamboltzis NTUA Athens-Greece E-mail: [email protected] Presented at the conference IFAC 2004 held in September 2004 (Nancy-France) 2 MODELLING THE SPECIFIC GRINDING ENERGY AND BALL-MILL SCALEUP Ball-mill scale up (Bond’s Law) Data: zBond work index w i zFeed D f and How to Calculate Grinding Mill Operating Efficiency,How to Calculate Grinding Mill Operating Efficiency. Previous Next In grinding, operating Efficiency compares the operating work index of a comminution machine to the Bond work index from bench scale crushing and grindability tests or/and pilot plant tests. Economic Efficiency is comparing the income from production to the planned income from production. Energy as consumed in comminution

  • Bond Tests Mining SGS

    Bond Ball Mill Grindability Test. The test determines the Bond Ball Mill Work Index which is used with Bond’s Third Theory of Comminution to calculate net power requirements*. Various correction factors may have to be applied. W = Wi (10/√P 10/√F) Where W = Net power consumption in kWh/tHow To Calculate Mining Mill Work Index,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

  • Orway Mineral Consultants Canada Ltd. Mississauga, ON

    The laboratory bench-scale SAG mill reproduces operating conditions of a commercial SAG mill, submitted to the Bond ball mill work index test. The number of SAG mill revolutions required to grind the material to a P 80 of 1.7 mm is used to predict AG/SAG specific energy using quation 4. Correction E factors for feed size and pebble ing are applied to the AG/SAG specific energy, as well asAMIT 135: Lesson 7 Ball Mills & Circuits Mining ,It has been recognized that the grindability of an ore in a ball mill is a function of both feed and mill parameters: Work index, W i; Largest particle size and size distribution; Density of solids and slurry; Mill diameter ; Rotational speed; Rowland and Kjos (1980) defined the largest ball size needed based on these parameters: d↓B = 25.4 [(F↓80 k) ↑0.5 (ρ↓s W↓i 100φ↓C (3

  • QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE VALUE

    others in Allis-Chalmers have developed a grinding test in a ball mill in a closed cycle until the establishment of stable recirculating load (Maxson et al., 1933). The Bond work index is a parameter which represents a measure of an ore resistance to grinding. Numerically, the work index represents the energy (kWh/sht) required to reduce the material of one short ton from a theoreticallyMODELING THE SPECIFIC GRINDING ENERGY AND BALL-MILL ,2 MODELLING THE SPECIFIC GRINDING ENERGY AND BALL-MILL SCALEUP Ball-mill scale up (Bond’s Law)Data: zBond work index w i zFeed D f and product d size (both 80% cumulative passing) Result: The specific grinding energy w Mill power draw P = wT, where T the mill capacity Mill dimensions (from Tables or charts)

  • A Method of C alculating Autogenous/ Semi-Autogenous

    including a 32 ft SAG mill, being put on hold. This mill has been operating ineffi ciently due to the hard coarse feed. 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.TECHNICAL NOTES 8 GRINDING R. P. King,TECHNICAL NOTES 8 GRINDING R. P. King. 8-2 &ROOLVLRQ 5ROOLQJ ZLWK QLSSLQJ Figure 8.1 Different types of grinding action by the grinding media. 7XPQEOL J 6KRXOGHU RI WKH ORDG *UDYLWDWLRQDO IRUFH ) 6WD J QDQW ]RQH J &HQWULIX J DO RUFHI ) F J,P S DFW ]RQH 7RH RI KWH RODG &DWDUDFWLQ J)FRV Figure 8.2 Media motion in the tumbling mill. 8.1

  • How To Calculate Mining Mill Work Index

    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 Fillingball mill power calculation cafeole-koeln.de,Ball Mill Design/Power CalculationLinkedIn. 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 ¼ inch 6350. Inquire Now; Ball Mill Power Calculation Pdfblackoutroom.pl. Ball mill size calculation. Calculation of the

  • ball mill operating rpm calculation

    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 ¼ inch (6350 microns). Get Price; Calculation Torgue For Operating A Ball Mill. Calculation Torgue For Operating A Ball Mill. Calculation torgue for operating a ballCalculation of energy required for grinding in a ,Calculation of energy required for grinding in a ball mill. Int. J. Miner. Process., 25: 41-46. The Bond work index, Wi, as an indicator of the grindability of raw materials is not a material constant but rather it changes with change of size of the grinding product. Therefore, in practice we can expect some difficulties and errors when the energy consumption is determined according to this

  • Bond Work Index Tests Grinding Solutions Ltd

    Bond Rod Mill Grindability Test. Grinding Solutions can carry out Bond Rod Mill Work Index tests to determine the energy requirements for milling ore in a rod mill. The test requires a minimum of 20kg of -12.5mm material. Closing screen sizes typically range from 4.75mm to 212µm. Abrasion Index TestGrinding in Ball Mills: Modeling and Process Control,An important characteristic of an industrial ball mill is its production capacity which is measured in tons of production per hour. The production capacity depends . 53 on mill dimensions, the type of the mill (overflow or grate discharge), the speed of rotation, the mill loading, the final product size required from a given feed size (coefficient of reduction), the work index of the material

  • ball mill work index rondpuntkinrooi.be

    The work index is then used to calculate the specific energy requirements for sizing ball mills or determining their throughput for a target grind. Chat Online ; Procedure for determination of ball Bond work index in the . The Bond ball mill grindability test is run in a laboratory until a circulating load of 250 is developed. It provides the Bond Ball Mill Work Index which expresses the,