In figure 1a both psd graphs show the typical ‘shoulder’ range 110μm coming from the limestone the clinker in the ball mill is clearly less ground than in the vrm which will result in lower mechanical strength although the vrm grinds the clinker to a higher degree the fineness of the limestone is not increased proportionally.
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Aug 11 2010 re material retention time in a ball mill amp 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
Learn MoreBall mill reduction ratio reduction ratio conical ball mill the reduction ratio r in rod mills varies from 2 and 20 depending on the characteristics of the usual reduction ratio is about 8 according to bond 4 the reduction ratio is a function of length and diameter of the mill
Learn MoreBall mills that are commonly used for finish grinding have high energy demands consuming up to 3042 kwht clinker depending on the fineness of the cement complete replacement of ball mills by vertical roller mills vrms with an integral separator – as opposed to the use of vrms as pregrinding to ball mills – is regarded as a breakthrough use of vrm in finish grinding combines
Learn MoreCalculate the reduction ratio of ball mill calculate the reduction ratio of ball mill of 40 the actual ball volume is considered to be 2124 of the empty mill now in order to get an efficient milling action 80110 of the pores in the ball bed must be filled with the actual particles to be ground reduction ratio for ball milling crusher
Learn MoreCalculation of the ball mill reduction ratio henan for overflow ball mills the charge should not exceed 45 of the mill volume for grate discharge mills the charge should occupy about 50 of the mill volume bond developed a relationship that can be used to determine the percent charge by volume as a function of the vertical height above the charge he and the radius of the mill r ie live
Learn MoreIn figure 1a both psd graphs show the typical ‘shoulder’ range 110μm coming from the limestone the clinker in the ball mill is clearly less ground than in the vrm which will result in lower mechanical strength although the vrm grinds the clinker to a higher degree the fineness of the limestone is not increased
Learn MoreMaximum size reduction in a fluid energy mill is achieved by interparticle attrition pick out the material having maximum rittinger ‟ s number galena pick out the material having minimum rittinger ‟ s number quartz rittinger ‟ s crushing law states that work required in crushing is proportional to the new surface created size reduction mechanism used in jaw crushers is compression soft
Learn MoreRatio of actual to predicted kwhtonne are as under for vertical roller mill 05 good performance 055 typical performance 06 safe design value 075 poor performance with lots of scope to
Learn MoreRaw mill means a ball and tube mill vertical roller mill or other size reduction equipment that is not part of an inline kilnraw mill used to grind feed to the appropriate size moisture may be added or removed from the feed during the grinding operation if the raw mill is used to remove moisture
Learn MoreReduction ratio of ball mill mobile crusher mobile as the size reduction ratio increases the optimum ball ratio moves towards more small balls at the finest grinding with a size reduction ratio of fig d a mm mm ball mix at a ratio was found to be the optimum mix this indicates that the finer the product size the higher the proportion of smaller balls that is
Learn MoreThan ball mills even if the ball mill is combined with a roller press this and further arguments led to the increased share of vrm for the grinding of finished cement taking into account that vrm usually have a bigger output than ball mills it can be declared that the major part of the cement production with newly installed mills comes from
Learn MoreThe advantages of vertical roller mills vrm is comparatively more energy efficient and on an average these system consume 25 less energy in comparison to the conventional ball mills vrm has higher drying capacity and can dry up to 25 moisture as against maximum drying capacity of 810 in the conventional ball mill
Learn MoreTypical cement plant reduction ratio being i n the order of 2501000 industrial scale data were collected from hpgrball mill vrm horomill and multichamber ball mill closed circuits
Learn MoreTypical reduction ratio for ball mill vrm used grinding mills tons typical reduction ratio for ball mill vrmresults of typically over m particle get price send email cement mills and raw mills for high throughput rates highquality wear materials sophisticated maintenance concepts and low specific wear rates reduce time and cost of
Learn MoreTypical reduction ratio for ball mill vrm sep 01 2013 as the size reduction ratio increases the optimum ball ratio moves towards more small balls at the finest grinding with a size reduction ratio of 1281 fig 7d a mm mm ball mix at a 1387 ratio was found to be the optimum
Learn MoreVolume ratio of grinding ball in ball mill average volume of a ball mill the average reduction ratios in rod and ball mills were 64 ball to 4451 of the ball mill volume can get the ideal grinding
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