fred bond ball mill power draw equations

  • Alex DollPrincipal ConsultantAlex G Doll Consulting

     · Procemin 2013 October 17 2013. SAG Mill power draw models are used in mill design and grinding circuit modelling to predict. how much power will be consumed by a particular mill geometry and operating configuration. This paper will compare SAG mill models by Morrell Loveday (using "Power Numbers" published.

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  • Power-based comminution calculations using Ausgrind

    (JKDWT) "A b" and the Bond ball mill work index. The SAG and ball mills power draw is calculated using semi-empirical equations as a function of mill geometry speed and load.

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  • Size Reduction and Energy RequirementScienceDirect

     · A Bond ball mill work index is then performed on the mill product for the design of SAG-ball mill circuits. This is important because it was found that there was a 1–1.5 kWh/t higher ball mill work index if the –3.35 mm ball mill test feed size is obtained by SAG mill grinding compared with crushing.

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  • Relationships between comminution J energy and

     · Throughout the batch grinding tests the power draw of the mill was measured using a purpose built power meter to facilitate the calculation of specific grinding energy. Results Table I shows the Bond ball mill work index obtained for the ore samples as well as the iron and silica content in concentrate and tail after LIMS. The concentrate weight

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  • Testwork Bond abrasion indexSAGMILLING.COM

     · These equations were based on the ball and liner metallurgy of the mid 20 th century and may be obsolete for more advanced steel alloys. The ball wear equations in SAGMILLING.COM use a newer calibration formula that uses the Bond Abrasion Index was published by Carlos Rabanal Levi Guzmán of Moly Cop Andesur (Procemin 2013).

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  • (PDF) MODELING THE SPECIFIC GRINDING ENERGY AND BALL-MILL

    The proposed model combined with a model giving the ball-mill power draw is used for the ball-mill scale up. Comparisons with the Bond procedure showed a good agreement for the prediction of the

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  • Ball Mill Design/Power Calculation911 Metallurgist

     · 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

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  • Comparison between bond crushing energy and fracture

     · predict the power draw of mills with reasonable accuracy over a wide range of mill diameters2 3. More than 10 years since then the DEM technique has been successfully applied to ball mills4–7 SAG mills8–10 and centrifugal mills11 12. DEM has also been applied to study impact-induced particle breakage. Using DEM simulation of impact

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  • AMIT 135 Lesson 7 Ball Mills CircuitsMining Mill

    Equations for mill sizes less than 3.81meters in diameter and greater than 3.81meters were proposed t/h D < 3.81 m t/h D > 3.81 m Wet Ball Mill Power Draw (Bond) For wet ball mills Bond expressed power draw as a function of the total mass of media Pâ†"M / Mâ†"B

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  • Dynamic modelling and simulation of semi-autogenous mills

     · The equation used to predict the power consumed by the mill (power-draw) M p is based on a modification of Bond s Law (Austin 1990) (3) M p = K p · D 2.5 · L (1-A · J) W V ϕ c 1-0.1 2 9-10 ϕ c where D (m) and L (m) are the mill dimensions V (m 3) is the mill effective volume ϕ c is the mill speed (fraction of critical speed) J is

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  • Metcom TrainingMetcom Technologies

    To determine the actual mill power draw and volumetric load of your mill from plant readings and measurements. 4. Work Index Efficiency To determine the Work Index calculations for evaluating grinding circuit efficiency as initially developed by Mr. Fred Bond. 5. Functional Performance of Ball Milling To determine ball mill circuit performance

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  • Pontificia Universidad ólica de Chile

     · The Bond_Op. Work Index spreadsheet was designed to estimate the Operational Work Index of a given grinding installation of known dimensions and operating conditions based on the traditional Bond s Law and the Hogg Fuersteneau Power Model (see Mill Power_Ball Mills spreadsheet for further details on such model).

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  • Engineering Sustainability of Mechanical Recycling of

     · is the comminution power (CP) in Watts consumed by ball milling machine 𝑃 is the mill power draw for running at no load and t is the total machining time in sec. The CP requirement can be specified 13 as shown in Equation (2). 𝑃 =W BCEF FGF FMD RREF SSF MT EF1 EF2 EF3 (2) Where W=Basic power required BCEF = Ball

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  • fred bond ball mill power draw equations

    fred bond ball mill power draw equations ..h to calculate the Relationships between comminution J energy and product and empirical energysize reduction equations The test work involved Bond ball mill testing the power draw of the mill was measured using a purpose built Grinding Mill Computer Model AusIMMRowling are used to calculate the mill power draw.

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  • A specific energy-based size reduction model for batch

     · For batch grinding using a Bond ball mill the mill net power draw was measured by an energy meter and calculated from the gross energy and no-load energy . The difference between the two regressed trend lines gave a net power of 86 W in a standard Bond ball mill charge condition ( Shi et al. 2006 ) which compared favourably with the 81 W

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  • SAGMILLING.COM . . Articles

    Correction of Bond Ball Mill Work Index Test for Closing Mesh Sizes It is commonly known that one must run the Bond ball mill work index test such you pick a closing mesh

    Fine Grinding a Refresheronemine

     · "Many power-based grinding models exist and most operators are familiar with Fred Bond s ""third theory"". Bond s model is most commonly used to describe primary and secondary grinding to product sizes above for example 100 µm. They can be fit to any type of mill including stirred and tumbling ball mills.IntroductionBuilding a case for

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  • Morrell Method-GMG-ICE-v01-r01 Morrell

     · Power draw of the comminution equipment (kW) •In the case of mills the power draw should be repre- and the Bond Ball Mill Work Index Test (GMG 2016a). The Morrell s equations can be used to predict the overall specific energy of most com-minution circuit configurations. Full details of

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  • A specific energy-based size reduction model for batch

     · For batch grinding using a Bond ball mill the mill net power draw was measured by an energy meter and calculated from the gross energy and no-load energy . The difference between the two regressed trend lines gave a net power of 86 W in a standard Bond ball mill charge condition ( Shi et al. 2006 ) which compared favourably with the 81 W

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  • Metcom TrainingMetcom Technologies

    To determine the actual mill power draw and volumetric load of your mill from plant readings and measurements. 4. Work Index Efficiency To determine the Work Index calculations for evaluating grinding circuit efficiency as initially developed by Mr. Fred Bond. 5. Functional Performance of Ball Milling To determine ball mill circuit performance

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  • Bond formula for the grinding balls size calculation

     · There is a mathematical solution to this problemthe Bond formula. It uses to help determine the grinding media optimal size must be loaded into the ball mill for proper operation ensure. The calculation formula is below Bthe grinding balls diameter mm Athe correction factor (for grinding balls A = 20 17 for cilpence A = 18 15)

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  • A Method to Determine the Ball Filling in Miduk Copper

     · of an industrial tubular ball mill some researches were done such as monitoring level of coal powder filling in an industrial ball mill as a function of mill`s power draw or investigation on the ball filling ratio under batch wet conditions due to load density alters 2 3 . In addition it is to be

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  • SAGMILLING.COM . . Articles

    Correction of Bond Ball Mill Work Index Test for Closing Mesh Sizes It is commonly known that one must run the Bond ball mill work index test such you pick a closing mesh

    Chat Online
  • (PDF) MODELING THE SPECIFIC GRINDING ENERGY AND BALL-MILL

    The proposed model combined with a model giving the ball-mill power draw is used for the ball-mill scale up. Comparisons with the Bond procedure showed a good agreement for the prediction of the

    Chat Online
  • SAGMILLING.COM . . Articles

    Correction of Bond Ball Mill Work Index Test for Closing Mesh Sizes It is commonly known that one must run the Bond ball mill work index test such you pick a closing mesh

    Chat Online
  • Bond formula for the grinding balls size calculation

     · There is a mathematical solution to this problemthe Bond formula. It uses to help determine the grinding media optimal size must be loaded into the ball mill for proper operation ensure. The calculation formula is below Bthe grinding balls diameter mm Athe correction factor (for grinding balls A = 20 17 for cilpence A = 18 15)

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  • GRINDING MILLSHOW TO ACCURATELY PREDICT

    existing models to accurately predict grinding mill power draw. This conclusion was supported by 1961/62 Bond Developed a semi-empirical ball mill equation using accurate mill power equations.

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  • Using modelling and simulation for the design of full

     · This model was then used to predict the net power draw of the Bond mill The resultant prediction of the new power draw of the Bond mill was 86.65W which is comparable to Levin s 19 value of 86.4W. From the full scale mill dimensions and operating conditions the net mill power draw was predicted using the JKMRC power model 12 .

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