Average Ball Mill Diameter Feed size vs ball size 7 replies 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 get price average ball mill size mine equipments
Jul 18 2013 the makeup balls are 80 mm forged alloy steel balls and the average ball consumption is 750 g t 1 ore ground in order to optimise ball size distribution inside the mill based on the previous investigation instead of using only 80 mm makeup balls a combination of 80 and 60 mm 75 and 25 wt ball charge was used in one of the grinding lines
Average ball abrasion for calculating of the average ball abrasion average weight of balls after abrasion test was deduced by average balls weight before abrasion at first ball filling in the mill was spot 1 and the number of balls in mill was estimated as shown below equations 7 8 and 9 43354436367869866 g 7
At what speed will the mill have to be run if the 100 mm balls are replaced by 50 mm balls all the other conditions remaining the same calculations the critical speed of ball mill is given by where r radius of ball mill r radius of ball for r 1000 mm and r 50 mm n c 307 rpm but the mill is operated at a speed of 15 rpm
Average ball mill 1 average ball mill 2 average vertical mill 7 figure 6 particle size distributions from ball mill and vertical mill circuits since the automatic sampling system from concentrator ii takes samples only from the combined streams on the regrinding circuit a series of manual sampling campaigns were conducted along the
Ball mill power calculation example 1 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 inch 6350 microns the required product size distribution is to be 80 passing 100
Ballrod mills based on 4 liners and capacity varying as 26 power of mill diameter on the 5 size give 20 per cent increased capacity on the 4 size 25 per cent and on the 3 size 28 per cent this fact should be carefully kept in mind when determining the
Average ball mill size 911metallurgistcom911metallurgistcom primary ball mill average size gold ores ball mills are commonly used in the manufacture of portland cement and finer grinding stages of mineral processing one example being the sepro tyre drive grinding mill industrial ball mills can be as large as 85 m 28 ft in diameter with a 22 mw motor list of
Average wear ratessmall mill test s mgmm 2 hr media grade average r400 r300 r240 test 1 00186 test results are related to production results ball size and mill operating
Chapter 5 effec t of ball size distribution on mill ing kinetics 62 the typ e of motion of partic les does not change on average the grinding media and the ball size distribution of the
Ball mill capacity amp dimensions 2013indd author jhoffmann created date 3282014 42057 pm
Mills with size reduction media ball mills dry ball mills are basically made of a drum partially filled with a grinding media typically beads of ceramics or steel the mill is filled with the grinding beads as well as the product then the mill is rotated until a speed
The small and average capacity ball mills are used for the final grinding of drugs or for grinding suspensions the maximum capacity ball mills are used for milling ores prior to manufacture of pharmactical chemicals advantages of ball mills it produces very fine powder particle size less than or equal to 10 microns view more details
Calculate and select ball mill ball size for optimum in grinding selecting calculate the correct or optimum ball size that allows for the best and optimumideal or target grind size to be achieved by your ball mill is an important thing for a mineral processing engineer aka metallurgist to do