One can argue the f50 is a more realistic value since balls wear and the average ball size might be closer to half the maximum Then the multiple would be closer to 13 times the maximum particle size fed to the ball mill A f80 6 mm would need a ball size of 75 mm An empirical model from Emerging Trends in Mineral Processing 2005 is often used
Jun 25 2018 · Specific gravity of the feed 22 gmcm3 Mill effective diameter 223 m 335 is a constant used for dry grinding with steel balls in the mill Actual size of media is taken is lower than the calculated value It is around 80 to 90 mm If you Wants to reduce the maximum ball size thenreduce the feed size by using pregrinding operation
More DetailsBased on his work this formula can be derived for ball diameter sizing and selection Dm 6 log dk d05 where Dm the diameter of the singlesized balls in mmd the diameter of the largest chunks of ore in the mill feed in mm
More DetailsFor the purposes of this example we will hypothesize that the the crushing index of the hard ore with the increased energy input of 154 kwt reduces the ball mill feed size to 6500 micrometers As a result the mill output will increase with this reduced size to approximately 77000 tons per day
More DetailsFor the feed size of 90 passing 189 mm Fig 6a the maximum capacity was obtained with 100 of a makeup ball size of 508 mm As the feed size is reduced to 134 mm a 6238 mix of 508 mm and 254 mm balls was found to be the optimum mix
More DetailsFeeding 15mm to a ball mill this size is not typical much larger ball mills 21 or diameter typically get 1216mm feed from what I have seen in my experience With regards to 4 media typically for Ball mills of this size 16 max size of ball used should be around the 5060mm
More Detailsmaximum feed size for ball mill talon cnc 1240 bed millplanetary ball mill pm 400 retsch laboratory equipment planetary ball mills are used wherever the highest Read more ball mill feed size
More DetailsCalculate Top Ball Size of Grinding Media FRED C BOND Equation Method Previous Next Although it was developed nearly 50 years ago Bond ‘s method is still useful for calculating necessary mill sizes and power consumption for ball and rod mills
More DetailsGRINDING MILLS A ball mill efficiently operated performs a wide variety of services In small milling plants where simplicity is most essential it is not economical to use more than single stage crushing because the SteelHead Ball or Rod Mill will take up to 2″ feed and grind it to the desired fineness
More DetailsJun 15 2018 · Specific gravity of the feed S gmcm3 Mill effective diameter D meter Then Maximum ball size for ball mill grinding is Bmm Example Size of the mill feed 80 passing in microns’ size 15000 microns 15mm Work index for the feed 18 kwh age of mill in critical speed 70 Specific gravity of the feed 22 gmcm3
More DetailsThe ball size is one of the critical factors for determining the millthe effect of the makeup ball size on the mill performance with various feed andwhere Si is the specific rate of the breakage of size
More Detailsball mill feed top size of feed size on breakage rate in pilot scale ball mill Experimental and size feed material and ball load in which 20 mm top size ball diameter in spite of the fact Ball Mill by SaraswathiB The ball size depends on the feed and the diameter of the mill
More DetailsThe balls which could be of different diameter occupy 30 50 of the mill volume and its size depends on the feed and mill size The large balls tend to break down the coarse feed materials and the smaller balls help to form fine product by reducing void spaces between the
More DetailsCentrifugal Ball Mill S 100 achieve a very high final fineness down to the submicron range The feed size depends on the mill and can have a maximum size of 10 mm maximum feed size for ball mill
More DetailsIt was also observed from the experimental results that in order to increase the milling efficiency of a ball mill towards optimum production of material in the desired size class there is a need to correlate the ball size and the feed size distributions
More DetailsMar 10 2011 · But remember it all depends on your mill feed size after pregrinding This is the raw mill not the finish mill So Wi should be 11 and density of 267 as normal kiln feed I used d80 of 3500 micron to be on safe side and got max ball dia of 41 mm use 50 mm steel balls
More DetailsCALCULATION OF MAXIMUM BALL SIZE FOR BALL MILL GRINDING Jun 25 2018· Mill effective diameter 223 m 335 is a constant used for dry grinding with steel balls in the mill Actual size of media is taken is lower than the calculated value It is around 80 to 90 mm
More Details332 N Magdalinovic et al is the maximum grain diameter m is the exponent which characterizes the grain size distribution The number of balls having the determined diameter in a mill depends on the ball size distribution in the charge
More Detailsmaximum feed size for ball mill Centrifugal Ball Mill S 100 achieve a very high final fineness down to the submicron range The feed size depends on the mill and can have a maximum size of 10 mm
More Details26 Effect of ball mixture 37 261 Ball size distribution in tumbling mills 37 262 Milling performance of a ball size distribution 40 27 Summary 41 Chapter 3 Experimental equipment and programme 43 31 Laboratory grinding mill configuration 43 32 Preparation of monosize grinding media 44 33 Feed material preparation 46
More DetailsJul 24 2009 · We are limited to a maximum spindle speed of 15000 rpm Do you concentrate on the sfm for finish end mills of the same diameter or do you consider that the center of the ball is going to push harder for a given feed per tooth Then when lace cutting the stepover becomes my next challenge
More Detailsmaximum feed size for ball mill hotelgouthammanor Apr 21 2015 ball mill max feed size maximum feed size for ball mill what is the feed rate for ball mill and the size is feed size of iron ore to ball mill feed Get Price And Support Online Effect of media size in stirred ball mill grinding of coal
More DetailsDec 28 2016 · Size diameter of the grinding media depends on the mill feed size particle size of material supplied to the mill and achieved degree of fineness size and percentage of required class size material at the exit of a ball mill Usually the size of grinding media indie in technical documentation for the mill
More DetailsBond Ball Mill Index JKTech A Bond Ball Mill Index Test BBMWI is a standard test for determining the Ball Mill Work Index of a sample of ore for a given grinding duty BBMWI feed size Kinetic approach to ball mill scaleup for dry and wet systems Utah were found to be independent of mill size the same for wet and dry grinding
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