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Ball Mill Partscritical Speed Of Ball Mill

ball mill operating speed - mechanical operations solved,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 = 30.7 rpm. but the mill is operated at a speed of 15 rpm. therefore, the mill is operated at 100 x 15/30.7 = 48.86 % of critical speed. if 100 mm dia balls are replaced by 50 mm dia balls, and the other conditions are remaining the same,.ball mill - slideshare,basic principle ball mill is generally used to grind material 1/4 inch and finer, down to the particle size of 20 to 75 microns. to achieve a reasonable efficiency with ball mills, they must be operated in a closed system. there is a specific operating speed for most efficient grinding..variables in ball mill operation | paul o. abbe®,the formula for critical speed is cs = 1/2π √ (g/ (r-r) where g is the gravitational constant, r is the inside diameter of the mill and r is the diameter of one piece of media. this reduced to cs = 265.45/√ (r-r). dry mills typically operate in the range of 50%-70% of cs and most often between 60%-65% of cs..ball mill - slideshare,-critical speed r –radii of the mill r- radii of the ball g –acceleration due to gravity 10. critical speed of ball mill(in rps)= r=.45/2=.225m r=25/2=12.5m g=9.81m/s2 nc=1.08rps=64.8 rpm.

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