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Question is lengthdiameter ratio of a ball mill is options are a 15 b 1 c 1 d 1 e leave your comments or download question paper
The productivity of ball mills depends on the drum diameter and the relation of drum diameter and length the optimum ratio between length l and diameter d ld is usually accepted in the range 156164 the mill productivity also depends on many other factors including the physicalchemical properties of the feed material the filling of the mill by balls and their sizes the armor surface shape
Ball mill design a survey of australian processing plants revealed a maximum ball mill diameter of 524 meters and length of 884 meters morrell 1996 autogenous mills range up to 12 meters in diameter the lengthtodiameter ratios in the previous table are for normal applications
Question is lengthdiameter ratio of a ball mill generally the diameter of the agitator is kept between l3rd to l6th of the tank diameter while the bla
Aug 02 2013 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 often the ball used in ball mills is oversize just in case well this safety factor can cost you much in recovery andor mill liner wear and
Generally filling the mill by balls must not exceed 3035 of its volume productivity of ball mills depends on drum diameter and the relation of drum diameter and length optimum ratio between length l and diameter d l d is usually accepted in the range 156164
Question is lengthdiameter ratio of a ball mill generally the diameter of the agitator is kept between l3rd to l6th of the tank diameter while the bla
The ball mill is a tumbling mill that uses steel balls as the grinding media the length of the cylindrical shell is usually 115 times the shell diameter figure 811the feed can be dry with less than 3 moisture to minimize ball coating or slurry containing 2040 water by weight
A typical ball mill will have a drum length that is 1 or 15 times the drum diameter ball mills with a drum length to diameter ratio greater than 15 are referred to as tube mills ball mills may be primary or secondary grinders primary grinders are fed from crushers such as a jaw crusher
Nov 18 2008 equations of the design by knowing the capacity quotcquot ton of the feed we can get approximately the length quotlquot mm and diameter quotdquot mm of the batch ball mill form d 1242c 4857 l 8571c 1854 volume of mill 2 the bulk volume of balls charge ratio to the volume of mill is known as filling ratio
Aug 30 2019 rho s loose density of grinding medium tm3 forged steel balls ps4548tm3 cast steel balls p4346tm3 rolling steel balls p6068tm3 steel segments p4346tm3filling ratio of grinding medium when wet grinding lattice ball mill pi 40 45 overflow ball mill phi 40 rod mill
eighty percent of twentyfive millimeters or finer for fragile rocks larger feed sizes can be tolerated depending on the requirements the ratio of machine length to the cylinder diameter of cylindrical type ball mills range from one to three through three to one
However if you are dealing with coarse feed between 13 mm then it will drop to 15 the true density of balls are around 75 then the optimal mass ratio of ball to powder in ball mill is
A tube mill as compared to a ball mill a employs smaller balls b gives finer size reduction but consumes more power c has larger lengthdiameter ratio 2 as compared to 1 for ball mill d all a b and c
Sep 21 2019 the tube mill is similar to the ball mill in construction and operation although the ratio of length to the diameter is usually 3 or 4 1 as compared with 1 or 15 1 for the ball mill 46
More balls with small size results in fine powder as a thumb rule powder to be milled should be taken as 25 of total ball weight if the quantity of charge is very less then milling balls will
The main differentiation factor between tube mill and ball mill is the a length to diameter ratio b size of the grinding media c final product size d operating speed
The calculation shows that the crushing ratio can reach 3000 4000 while the ball mills crushing ratio is smaller the feed size is usually between 2030mm and the product size is 03mm and because the ball mill feed grain size is larger ball mill feeding groove must have a larger slope and height so that feed smooth bearing
Question is lengthdiameter ratio of a ball mill generally the diameter of the agitator is kept between l3rd to l6th of the tank diameter while the bla
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 often the ball used in ball mills is oversize just in case well this safety factor can cost you much in recovery andor mill liner wear and
A survey of australian processing plants revealed a maximum ball mill diameter of 524 meters and length of 884 meters morrell autogenous mills range up to 12 meters in diameter the lengthtodiameter ratios in the previous table are for normal applications for primary grinding the ratio could vary between 11and 181
Length diameter ratio of a ball mill is ball mill ball mills length to diameter ratio tube mills have a ratio of length to diameter of 36 1 for ball mill this relation is2 1 two different processes occur inside the mill 1 crushing breaking up of the incoming particles from a
Figure 1 standard ball mill circuit arrangement figure 2 ball mill circuit productivity vs circulating load ratio after ew davis what is the circulating load ratio in your ball milling circuit there is a rapid and easy way to calculate it from any set of circuit size distribution data for the standard circuit arrangement shown in
A tube mill as compared to a ball mill a employs smaller balls b gives finer size reduction but consumes more power c has larger lengthdiameter ratio 2 as compared to 1 for ball mill
Slice mills are identical to the ball mills and ceramic lined mills in diameter and design the only difference is that they are as little as 12 in length since mill diameter dictates performance and mill length only affects capacity slice mills are used to develop or
Nov 20 2019 ball filling ratio a 1090 revolution speed in counter direction 100800 rpm n r initial amount of mos 2 0010 g ball size 2 or 5 mm d milling duration 0524 h t
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