factor of 125 that accounts for the difference in grinding efficiency of a SAG mill versus a ball mill The original Barratt papers do not specify values to use for P C and P R , but we can use the same values as Table 1 of 10 000 µm

Know MoreThe Bond efficiency factors of 48-61 % were obtained for the BGM grinding circuit, indicating an inefficient operation , The ball mill grinding efficiency was poor and could be indicated by the fraction < 125 µm of only 5-9 % or x P, 80: >400 µm in the mill discharge

Know Morethe other mills, as previously mentioned ball mills have a very low efficiency in terms of utilizing the energy generated towards particle size reduction The diameter of the balls used in ball mills play a significant role in the improvement and optimization of the efficiency of the mill [4] The optimum rotation speed of a mill, which is the .

Know MoreThis table shows that when the mill diameter inside liners is larger than 381 meters (125') that the diameter efficiency factor does not change and remains 0914 EF4 - Oversized Feed - when the grinding mill is fed a coarser than optimum feed, this factor applies to rod milling and ball milling

Know MoreBall mills 55 m (18 ft) in diameter and larger tend to use energy delivered to the mill less efficiently than smaller diameter mills, particularly when the large mills carry 40% by volume ball charg This paper will explore factors used in scaling up ball mills, showing where the advantages of one factor can possibly be negated by another factor The paper will propose possible operating .

Know MoreMagotteaux can use all this information to help you improve your milling efficiency and build up your business The factors affecting milling efficiency are ball size, type and density, the grinding circuit parameters, mill internals such as the liner profile, etcetera, the mill ,

Know More08-02-2017· Energy consumption for ball mills is a function of many factors: the physical properties of the ground material β its specific gravity and hardness; the degree of drum filling by grinding balls; the number of drum rotations, etc Ball mills have low efficiency β no more than 15%

Know MoreTumbling mill Vibrating mill Planetary ball mill Stirred ball mill Mills with loose grinding media Overview crusher and mill types , Conclusions regarding energy efficiency Energy transfer factor is important to characterize the mill beside Type of stress Stress energy distribution Absolute stress ,

Know MoreSince for the ball mill design we are using 80% passing, the required value of C2 for the ball mill will be equal to120 C3 is the correction factor for mill diameter and is given as; πΆπΆ3 = 244 π·π· 02 (3) However, it is important to note that C3 =0914 vessel used in producing the ball mill was got from a

Know MoreThe degree of filling the mill with balls also influences productivity of the mill and milling efficiency With excessive filling, the rising balls collide with falling on Generally, filling the mill by balls must not exceed 30β35% of its volume Productivity of ball mills depends on drum diameter and the relation of drum diameter and length

Know Morewhere d bmax is the maximum size of feed (mm); Ο is compression strength (MPa); E is modulus of elasticity (MPa); Οb is density of material of balls (kg/m 3); D is inner diameter of the mill body (m) Generally, a maximum allowed ball size is situated in the range from D /18 to D/24 The degree of filling the mill with balls also influences productivity of the mill and milling efficiency

Know Moreoverloading the mill is an additional factor A direct measurement of the ball level in the mill, more accurate than power readings, as well as a control of it, is therefore highly important Load angle as an indicator of milling efficiency? Toe and shoulder angles ,

Know More14-05-2017· Factors Affect Ball Mill Efficiency There are various factors affect ball mill efficiency, such as properties of raw material, feeding size, size and proportion of grinding balls and so on And these factors are not mutually independent, they all have effect on each other

Know More25-10-2017· The following are factors that have been investigated and applied in conventional ball milling in order to maximize grinding efficiency: a) Mill Geometry and Speed β Bond (1954) observed grinding efficiency to be a function of ball mill diameter, and established empirical relationships for recommended media size and mill speed that take this factor ,

Know MoreCALCULATION OF BALL MILL GRINDING EFFICIENCY Page 1 of 1 Mar 08 2013 0183 32 calculation of ball mill grinding efficiency dear experts please tell me how to calculate the grinding efficiency of a closed ckt amp 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 .

Know Morefactor for ball mill product fineness to apply, the ball mill circuit P80 should be no less than approximately 70 µm (See reference by Bond, 1962) This (Bond) efficiency determination should not be applied to circuits with a P80 finer than 70 approximately µm , without making qualifications Please refer to the example(s) that follow

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