An novel approach for determining grinding media system of ball mill was proposed • the optimum media ball size of three size fraction samples were obtained • the media size ratio was ascertained as φ 50 mm φ 40 mm φ 30 mm 28 28 44 • the installed power and productivity of ball mill φ503 m 640 m were calculated.
Apr 26 2019 the ball mill works on impact and attrition principle its impact is the size reduction given that the balls drop from almost the top of the shell the balls are the grinding media which could be made of ceramic rubber steel etc ball mills operate by rotating around a horizontal axis almost filled with the material to be ground and the
Bond formula for the grinding balls size calculation oct 19 2017 as practice shows the difference between the grinding balls average diameter in mill and loaded grinding balls diameter is 1015 mm in our example the grinding balls diameter needed to load into the mill must be equal to 4050 mm ball mill media optimization metcom tech
Dec 08 2009 re how to estimate the wear rate for ball mill most practical way to by measuring empty height and calculating the volumetric filling of grinding mediaalternative way to make track of mill main drive kw consumption reduction and add makeup charge according to the extent of fall in power
Dec 08 2009 re how to estimate the wear rate for ball mill most practical way to by measuring empty height and calculating the volumetric filling of grinding mediaalternative way to make track of mill main drive kw consumption reduction and add makeup
Grinding media ball is one of the essential parts of ball mill the quality of grinding media ball affects not only the productivity of the ball mill but also the consumption of ball and then affects the cost of grinding medium the pursuit of high hardness and low single consumption is not
How to calculate size of ball mill in cement plant nov 12 2013 ball mill power dear experts we have a ball mill in combi mode for cement grinding roller press before the ball mill the supplier has given 28 grinding media filling with shaft power 2270 kw only ball mill size is 44 11 m grinding media size is max 30mm it is a monochamber mill designed to grind the roller press
Let vb be the volume of steel balls in the mill vmed be the volume of autogenous media and vs the volume of slurry vb jb1 evm vs jtuevm vmed jt jb1 evm 817 the charge density is calculated from c vb b vmed m vs1 3 v1000 vs3 v 0 jt 818 where b is the density of the balls and m the density of the media the effective length of the m ill is dependent on
Mcm weight grinding media minc ≈mcm ρ the density of the material of grinding media ρcm bulk density of grinding media bulk density of grinding media can be determined if ρ and ε are known with the relation ρcm ρ1 −ε 2 the relation 2 is useful also
Monochamber mills 2 ball charges composition calculator for 2 chambers calculation of the top size grinding media 6 ball charges grinding media wear rate monochamber mill 10 grinding comminution in the cement industry get
Nov 01 2019 in general the ball mill is ground by the impact energy applied to the materials owing to the dropping of the grinding media that is moved upward by the rotation of the mill the normal force applied to the materials by the grinding media were calculated using the edem and can be seen from fig 10 when the total force is checked the normal
Sep 01 2013 a grinding circuit simulation combined with ball weal law was used to determine the optimum composition of the makeup ball sizes in tumbling ball mills it was found that the optimum composition depends on various factors including the feed size the product size the mill diameter and the breakage
Sizes from 400 microns to over 1 inch in beads balls satellites ball with bands and cylinders low to medium cost small sizes are more costly fused zirconium oxide grinding media spgr 38 smooth surface leads to low mill wear and
The mill grinding rate through the size of interest 150 m the circuit target p80 calculated from the plant survey data using the functional performance equation was 00568 t kwh the ‘energy specific cumulative grinding rates’ for the survey calculated from ball mill feed and discharge size
To calculate grinding media charge for continuous type ball mill m 0000676 x d2 x l example to calculate grinding media charge for a 180 cm dia x 180 cm long batch type ball mill with duralox 50 mm thick bricks formula to be used is m 0000929 x d2 x l d