how to calculate ball charge in sag mills

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  • automatic balls charging machine for ball mill

    Jul 20, 2018· This simple machine is used to the ball mill to add the certain size of balls in the certain time to the ball mill woking stable, easy operating Details: [email protected]

  • TECHNICAL NOTES 8 GRINDING R P King

    steel balls in a ball mill, or large lumps of ore in an autogenous mill or a mixture in a semi-autogenous mill, as well as the slurry that makes up the operating charge Let Jt be the fraction of the mill volume that is occupied by the total charge, Jb the fraction of the mill volume that is occupied by steel balls and E the voidage of the balls...

  • CALCULATION OF BALL MILL GRINDING EFFICIENCY

    Mar 08, 2013· calculation of ball mill grinding efficiency dear experts please tell me how to calculate the grinding efficiency of a closed ckt & open ckt ball mill in literatures it is written that the grinding efficiency of ball mill is very less [less than 10%] please expalin in a n excel sheet to calcualte the same thanks sidhant reply...

  • Best way to determine the ball

    Best way to determine the ball-to-powder ratio in ball-milling? , Or you could go even further and calculate if the energy of the ball striking the powder into the wall would be enough the cold ....

  • sag mill ball charge calculation

    Improved Relationships for Discharge in SAG/AG Mills - UQ eSpace TABLE 32 PEBBLE PORT DISCHARGE REGRESSION EQUATION , mills, such as ball mills and SAG mills (Musa and Morrison 2009) In recent years , charge region, it overflows to form a pool at the toe (Latchireddi and Morrell 2003) Chat Online...

  • THE BULK WEIGHT OF GRINDING BALLS

    Mar 14, 2017· In the grinding material process at ball mills becomes necessary to calculate the bulk weigh of used grinding media The bulk weigh of the grinding balls is necessary to understand the grinding balls mass in the cube, the grinding balls mass loaded into the mill, the prevention of mill ,...

  • MATERIAL RETENTION TIME IN A BALL MILL & VRM

    Aug 11, 2010· Re: MATERIAL RETENTION TIME IN A BALL MILL & VRM You could do that by measuring the material flowrate Q[tons/h] through the mill as well as the quantity M[tons] of material that accumulates within the mill The retention time, also called residence time, is the ratio (M/Q) [h]...

  • Mill Charge

    SAG mills of comparable size but containing say 10% ball charge (in addition to the rocks), normally, operate between 70 and 75% of the critical speed Dry Aerofall mills are run at about 85% of the critical speed The breakage of particles depends on the speed of rotation...

  • Autogenous and Semi

    The designs of autogenous and semi-autogenous (SAG) grindings mills are described followed by the description of their methods of operation in grinding circuits involving crushers and ball mills Methods of estimating SAG mill volumes, mill charges, feed size and power consumptions and optimum speeds of rotation during operation are described...

  • Calculate Ball Charge Ball Mill

    How To Calculate Ball Charge In Sag Mills Protable Plant calculate ball charge ball mill Description : Get Price Ball mill Wikipedia The ball mill is a key , Aside from common ball mills there is a second type of ball mill called a planetary ball mill Planetary ball mills are smaller than ....

  • Ball Mill Design/Power 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)...

  • 3D Animation Demo & working site of Ball Mill

    Nov 12, 2014· 3D Animation Demo & working site of Ball Mill Henan Bailing Loading, Unsubscribe from Henan Bailing? , Cambio de trunnion sag y bolas - Duration: 19:03 Cafimec 10,435 views...

  • Mill (grinding)

    SAG is an acronym for semi-autogenous grinding SAG mills are autogenous mills that also use grinding balls like a ball mill A SAG mill is usually a primary or first stage grinder SAG mills use a ball charge of 8 to 21% The largest SAG mill is 42' (128m) in diameter, powered by a 28 MW (38,000 HP) motor...

  • Mill sizing method

    Please find below two calculators for sizing mills using the Bond and Rowland methods: Ball mill sizing: Calculator for ball mill(s) in a single stage circuit Rod ball mill sizing: Calculator for rod mill(s) as first stage of the circuit and ball mill(s) as second stage of the circuit...

  • Optimum choice of the make

    Optimum choice of the make-up ball sizes for maximum throughput in tumbling ball mills , For the same amount of ball charge, the number of balls in the mill decreases as the ball size increas , A regression analysis of all parameters yields an equation that can be used to calculate the optimum composition of the make-up balls as a ....

  • automatic balls charging machine for ball mill

    Jul 21, 2018· This simple machine is used to the ball mill to add the certain size of balls in the certain time to the ball mill woking stable, easy operating Details: [email protected]

  • Calculate ball charge ball mill

    Calculate ball mill charge levendlandgoednl Calculate Ball Mill Grinding Capacity 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...

  • Ball charges calculators

    - Ball top size (bond formula): calculation of the top size grinding media (balls or cylpebs):-Modification of the Ball Charge: This calculator analyses the granulometry of the material inside the mill and proposes a modification of the ball charge in order to improve the mill efficiency:...

  • A Method of C alculating Autogenous/ Semi

    SAG mills mimic the same shortcoming It follows that in order to obtain the specifi c energy (SE) to achieve a certain transfer size, based on the 80 per cent passing value, an ineffi ciency factor must be applied to the SE of single stage ball mills, rod mills or AG/SAG mills when calculating power according to the Bond Third Theory method...

  • Difference Between Sag Mill vs Ball Mill

    Oct 12, 2017· SAG mill make use of steel balls included with some large and hard rocks for grinding These mills utilize the balls in making the large fragments of materials broken into piec The ball charge of a SAG mill is about 9% to 20%This process takes place inside the large rotating drum of SAG mill which is filled with balls partially...