Apr 08 example calculation a motor with around horse power is calculated needed for the designed task now we much select a ball mill that will draw this power the ball mill motor power requirement calculated above as hp is the power that must be applied at the mill drive in order to grind the tonnage of feed from one size distribution the following shows how the size or select the

Apr 20 the first two grinding efficiency measurement examples are given to show how to calculate wio and wioc for single stage ball mills figure 1 the first example is a comparison of two parallel mills from a daily operating report mill size 503m x 61m 165′ x 20′ with a id of

Apr 22 2 more crushing and less grinding to reduce the feed size into mill the larger feed size the more work that the ball mill needs to do on the

Aug 01 the power draw consumed by the first chamber is kw and by the second chamber is mw for a total power draw for the mill of 232 mw this prediction is within the expected range for such a mill the exact experimental power draw is not available for this mill with this ball size distribution and fill

Ball mill calculations free download as excel spreadsheet xls pdf file pdf text file txt or view presentation slides online ball mill

Ball mill design calculation xls and pdf file attrition calculator meetingu 55 000 mtph mill line with 2 600 hp gearless sag mill and two 11 625 hp ball ball mill capacity calculation ore equipment manufacturers ball mill capacity calculation ball mill for gold mining indonesia use wetdry grinding process grinding could be

Ball mill designpower 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

Ball mill for coal handling equipment india ore processingrinciple of machine operation ball miller south africa vikor ball mill ball mill mining what is a ball mill crusher two stage ball mill power consumpation calculation effect of ball top size ball mill labeled ball crusher cement ball mill pdf binq mining raw material for ball mill

Ball mill for limestone grinding power calculation ball mill for limestone grinding power calculation ball mill ball mills are used primary for single stage fine grinding regrinding and as the second stage in two stage grinding circuits according to the need of customers ball mill can be either wet or dry designs ball mills have been more

Ball mill motorpower sizing calculation 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

Ball mill special design to ball mill which will be selected on the basis of hardness grindability index of material to be ground feed size particle size and hourly capacity customized to the liner selection of grinding ball and rod can improve grinding efficiency farthest and reduce the energy

Dec 02 the ball charge typically occupies around of the volume of the mill depending on the mill motor power and desired energy consumption and production

Dec 12 if p is less than 80 passing 70 microns power consumption will be ball mill power calculation example a wet grinding ball mill in closed circuit is

Ef5bm p p80 3 the ef4 formula requires both the rod mill and ball mill work index rod mill wi is used to calculate the optimal feed size and because this is a singlestage ball mill calculation the f80 is actually the rod mill feed size m from table 1 and the p80 is the ball mill circuit product the ef5 factor only applies below 75 m to

Equation 1 is multiplied by the factor of 108 a multicompartment ball mill consists of two or more grate discharge ball mills in series the same equation is used to calculate the power that each ball mill compartment should draw the total power is the sum of the power

Feb 01 in this configuration a multichamber ball mill was operated as closed circuit with an air classifier design parameters of the circuit are presented in table 2as a result of the mass balancing studies the tonnages around the circuit and the measured and the calculated size distributions are presented in fig 2 fig 3 download download fullsize

From the volume the ball mill divide into industrial ball mill and laboratory use the small ball mill sample grinding test in addition these mills also play an important role in cold welding alloy production and thermal power plant power production sag mill vs ball mill crushing

How to calculate ball mill rpm with formula how to calculate ball mill rpm ball mill critical speed calculationball grinding machine determine the spindle speed rpm and feed rate ipm for a milling operation as well as the cut time for a given cut lengthformula to calculate filling of ball

Hpgr and ball mill circuit this is a highly experimental model use at your own risk the high pressure grinding roll hpgr and ball mill circuit can be thought of as a variation on the classical single stage ball mill ssbm circuit with the final stage of cone crushing replaced by an

In multistage abcsabc circuits the ag or sag mills are in closed circuit with screens and pebble crushers the mill discharge from these mills consists of slurry which goes to the ball mills for further grinding and coarse pebblesrocks which are crushed and sent back to the

In this paper energy consumption in the ball mill grinding operation has been analyzed under different operating conditions in terms of two key performance parameters i mill power specific absolute grinding rate of the coarsest size fraction of particles s and ii mill power specific absolute rate of production of the ground product

Jan 01 for example for an 36′ 17′ sag mill with a power consumption of 117 mw operating at 73 solids 135 balls charge and at 76 of the critical speed with 50 of the feed in the size class −6″ 1″ it could be possible to increment in 2 the balls charge to 155 reducing the −6″ 1″ to 348 with no changes in the

Jan 01 based on these test results a 67 m diameter 21 m length sag mill and a 33 m 61 m ball mill were installed for commercial operation in closed circuit with a hydrocyclone the sag mill had a 6–8 ball charge and the power consumption was 8 kwht which agreed well with the expected value 96 problems

May 30 charge behaviour and power consumption in ball mills of 25 nm for the agate ballmill is smaller than that of 35 nm for the stainless ballmill while the milling time to reach the ultimate

Mill power consumption example ball mill 35 m x 35 m rubber lining 75 mm mill volume charge 40 grinding balls diameter 70 mm mill operational speed 176 calculate the optimum power consumption to operate the mill

Observation total height of ball mill 67 inch 558 ft height of ball feed material 54 inch 45 ft empty space 13 inch 108 ft percentage of fill level percentage of empty space fill level the load of the ball is usually a little more than half of the volume of the mill generally 23 volume of the

Oleg d neikov in handbook of nonferrous metal powders tumbling ball mills tumbling ball mills or ball mills are most widely used in both wet and dry systems in batch and continuous operations and on a small and large scale grinding elements in ball mills travel at different velocities therefore collision force direction and kinetic energy between two or more elements vary

Power calculation formula for ball mill calculation of power consumption for ball mills and grinding calculation of power consumption for ball mills and grinding jul 13 gulin crushing screening grinding and washing plant play a great role in aggregate

Sag milling the most widely used and energy consumer stage in the grinding circuit acquires a very important role usually tumbling mills power equations have been derivate from mechanics as the product of torque and rotational speed models for the prediction of the power drawn by ball

The benefits of accurate mill scaleup are widely acknowledged in the minerals industry and reported in the literature 1 2 one example is in the design and simulation of milling

The mill product can either be finished size ready for processing or an intermediate size ready for final grinding in a rod mill ball mill or pebble mill agsag mills can accomplish the same size reduction work as two or three stages of crushing and screening a rod mill and some or all of the work of a ball

The power consumption calculation of a ball drum mill idosi key words ball drum mill grinding media material grinding grinding efficiency mode of grinding media motion power consumption calculation method get

This is numerically denoted by the ratio of the mill motor power and the corresponding production rate kwht at a given blaine fineness cm2g specific power consumption for clinkergypsum grinding in a ball mill should be approximately cm2 g 244 kwht cm2 g 268 kwht cm2 g 294 kwht cm2 g 320 kwht cm2 g

Total energy consumption of the conventional ball mill this project is planned in two stages in the first stage the working conditions and parameters solid revolution speed feed rate

With a view to developing a sound basis for the design and scaleup of ball mills a large amount of data available in the literature were analyzed for variation of the two key mill performance

You need a twostage solution first stage opencircuit mill and then second stage closedcircuit mill first stage will be broken into two parts as well you use a bond rod mill work index for the coarse component of the ore 21 mm and the bond ball mill work index for the fine component 21

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