mills with the rod mill and ball mill laboratory work indic Note, in Figure 1, that the rod mill product slope is less than 05 due to an extra amount of nes present being ﬁ ﬁ ner than 650 μm These ﬁ nes proceed to the ball mill improving the ball mill efﬁ ciency Also, the plotted rod mill P80 value, as shown in Figure 1, is 2900 ....

Jan 07, 2015· Raw mills usually operate at 72-74% critical speed and cement mills at 74-76% 32 Calculation of the Critical Mill Speed: G: weight of a grinding ball in kg w: Angular velocity of the mill tube in radial/second w = 2*314*(n/60) Di: inside mill diameter in meter (effective mill diameter) n: Revolution per minute in rpm...

Jun 19, 2015· The effect of Ball Mill RPM speed going from sub-critical to super-critical helps understand the Ball Mill Working Principles of ball-on-ball VS ball-on-shell grinding The Motion of the Ball ,...

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 optimum/ideal or target grind size to be achieved by your ball mill is an important thing for a Mineral Processing Engineer AKA Metallurgist to do...

To calculate the weight of an order >Given number of sheets and kgs/1000 sheets Order Weight = kgs/1000 x Number of sheets 1000 eg 473 x 5000 = 2365 kg 1000 Linear metres in a reel, given weight of reel in kg, width in mm and grammage m = Weight (kg) x 1,000,000 gsm x Width (mm) Number of sheets per tonne, given gsm and required size in mm...

Best way to determine the ball-to-powder ratio in ball-milling? , Total weight of ball = number of ball X weight of single ball , The maximum power draw in ball mill is when ball bed is 35-40 ....

Bearing Load Calculation A-22 (2)Loads acting on cross shafts Gear loads acting on straight tooth bevel gears and spiral bevel gears on cross shafts are shown in Figs 44 and45 The calculation methods for these gear loads are shown in Table 43 Herein, to calculate ,...

The inlet and the outlet of material in mills rotary drum is realized by tubular trunnion of the mill It is necessary that the level of charge does not exceed the level of the inside surface of the tubular trunnion, otherwise the charge can get out of the mill (fig 2) R 1 R D n D t1 2 t 4 t 3...

Mar 08, 2013· calculation of ball mill grinding efficiency dear experts please tell me how to calculate the grinding efficiency of a closed ckt & 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 sidhant reply...

calculators, engineering calculators, Enter value, select units and click on calculate Result will be displayed...

Motor Sizing Calculations This section describes certain items that must be calculated to find the optimum motor for a particular application Selection procedures and examples are given Selection Procedure First, determine certain features of the design, such as drive mechanism, rough dimensions, distances moved, and positioning period...

mills and ball mills for use in the mining and cement industri By current stan-dards, girth gears can be as large as 14 meters (46 feet) in diameter, 11 meters (44 inches) face width, and 50 module (5 DP) tooth size, and weighing upwards of 120 tons Flange mounted gears rely, in large part, on the mill ,...