Aug 11, 2010 Re: MATERIAL RETENTION TIME IN A BALL MILL & VRM You could do that by measuring the material flowrate Q [tons/h] through the mill as well as the quantity M [tons] of material that accumulates within the mill. The retention time, also called residence time, is the ratio (M/Q) [h]
Aug 11 2010 Re MATERIAL RETENTION TIME IN A BALL MILL VRM. You could do that by measuring the material flowrate Q tons/h through the mill as well as the quantity M tons of material that accumulates within the mill. The retention time also called residence time is the ratio (M/Q) h . Material inside the mill and retention time
Then take the volumetric feed rate of the new ore per time. Divide the unit capacity by the feed rate and you have the nominal retention time. Say your unit capacity is 1/2 cubic meter and you are feeding 6 cubic meters per hour, your retention time would be about 5 minutes. http://www.smartdogmining.com/ David 4 years ago Like
Calculation Of Ball Mill Residence Time. According to the ball mill survey database presented in Section 4, the volumebased residence time of slurry in an overflow ball mill should be greater than 2 min for a less than m diameter ball mill, and 1 min for a larger than m ball mill. Get Price
Aug 11 2010 0183 32 Re MATERIAL RETENTION TIME IN A BALL MILL VRM You could do that by measuring the material flowrate Q tons/h through the mill as well as the quantity M tons of material that accumulates within the mill The retention time also called residence time is the ratio M/Q h... calculate residence time through ball mill
The number of stresses can be characterised by the average retention time of the ground material inside the mill if the ball charge grading remains unchanged. The optimal retention time depends not only on the feed material and the desired comminution result but also on the ball charge filling ratio and particularly on the L/D ratio
OK mill and the retention time in the mill is shorter, the product will not be heated up as much as in a ball mill. This means that a lower degree of dehydration of the gypsum must be anticipated. This may not be a problem if the gypsum is sufficiently reactive to control the setting reactions, which is normally the case. If in special
Increasing production and ensuring grinding discharging slurry particles that can meet the requirements is the ultimate goal of ball mill. In the cement industry, to achieve this goal, we should adopt closed-circuit process, namely the slurry discharging by the ball mill, sieve, and sieve material back to the ground again
Ball Mill Residence Time. 2007-10-29 residence time distributions in ball mills. a review is made of the methods and how do you calculate ball mill residence time? - answers.,bore grinding cycle time calculation samac,code for ball mill samac baoli forkliftscozabore grinding cycle time calculation power calculator calculate ball mill retention time grinding mill china
factors affecting ball mill grinding efficiency. a) Mill Geometry and Speed 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 into account. ... mill retention time, internal friction and filling of the
vertical mills retention time formula pare between dry and wet Calculation of retention time of material in a two compartment ball mill For more vertical mills .... Determination of breakage parameters in laboratory scale , - Know More
Grinding Cement Mill Calculator Material Retention Time. Material Retention Time In A Ball Mill Vrm. Aug 11 2010 re material retention time in a ball mill vrm you could do that by measuring the material flowrate qtonsh through the mill as well as the quantity mtons of material that accumulates within the mill the retention time also called residence time is the ratio mq h
Feb 01, 2022 The ball mill is used for the grinding of a wide range of materials, including coal, pigments, and felspar for pottery, and it copes with feed up to about 50 mm in size. The efficiency of grinding increases with the hold-up in the mill, until the voids between the balls are filled. Further increase in the quantity then lowers the efficiency
Feb 17, 2021 Comparison between Raymond Mill, Vertical Mill and Ball Mill. The residence time of the material in the vertical mill is 2-3 minutes, and the ball mill needs 15-20 minutes, so the chemical composition of the product can be quickly corrected by the measurement when grinding the material with the vertical mill, so the product composition fluctuation is small
underflow) with a torque-instrumented, pilot ball mill. Using the same ball charge (76 mm top size) as used in the plant, calculated cumulative grinding rates of 4.75 to 9.425 mm particles were approximately four times higher for the plant mill than those of the pilot mill, even though the rates converged at fine particle size (106 microns)
Third, in the typical ball mill, because coarse particles have a longer retention time, they have more “specific energy (kWh/t) applied to them” than do smaller particles, the study said. This means that “if a coarse particle is retained in the mill for a longer period of time, it is exposed to a larger amount of energy,” Bartholomew said
mill, 2) to reduce the power required per ton of ore ground to the desired size, 3) to reduce steel con- sumption per ton of ore ground, 4) to improve prod- uct size, and 5) to lower retention time of ore in the mill. An increase in throughput of the ball mill offers a big advantage. Since total milling cost is the sum of
( 45 m) in the ball mill product varied from 6% to 60%, with an average of about 28%. 40% of the samples taken over this period contained more than 30% ultrafine material
Speed. 1440 RPM. Know Process of Ball Mill (Continuous): Heavy duty, continuous type ball mill is with three compartment and screen. Replaceable Liners are fixed inside entire mill. Liners material and shape is selected based on material to be grind
Introduction to the use of the attainable region method in determining the optimal residence time of a ball mill Author links open overlay panel Fran ois K