Ball mill designpower calculationball mill designpower calculationDec 12 2016 ball mill power calculation example a wet grinding ball mill in closed circuit is to be fed 100 tph of a material with a work index of 15 and a size distribution of 80 passing inch 6350, ball mill capacity calculation on the basis of feed size
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Dec 12 2016 ball mill power calculation example a wet grinding ball mill in closed circuit is to be fed 100 tph of a material with a work index of 15 and a size distribution of 80 passing inch 6350
Calculation feed capacity mill dimensions filling ratio 3045 mill dimensions bulk volume of the balls ball size d2 k dp where k ranges from 09 to 14 speed of the cost ball mills ball charge are 315 ston
Number size and mass of each ball size depends on mill load and whether or not the media is being added as the initial charge for the initial chargin of a mill coghill and devaney 1937 defined the ball size as a function of the top size of the feed ie dv 040 kf db ball size cm f feed size
Higher capacity than ag mill grinding primary coarse grinding up to 400 mm feed size grinding media is grinding feed plus 412 ball charge ball dia100 125 mm high capacity short retention time less sensitive to feed composition critical size material semiautogenous mill note the size of the mill why does the diameter need to be
Capacity 25 of total total volume wet working capacity 60 of total rpm dry milling 60 of critical gear pinnion drive used on larger mills jh 32014 talk with the experts sales since 1911 phone 6303503012 fax 6302387584 b ball mill capacity dimensions
Calculations for efficiency of cement ball mill ball mill calculation in cement ball mill designpower calculation the basic parameters used in ball mill design power calculations rod mill or any tumbling mill sizing are material to be ground characteristics bond work index bulk density specific density desired mill tonnage capacity dtph operating solids or pulp density feed size as
Ball mills give a controlled final grind and produce flotation feed of a uniform size ball mills tumble iron or steel balls with the ore the balls are initially 510 cm diameter but gradually wear away as grinding of the ore proceeds the feed to ball mills dry basis is typically 75 vol ore and 25 steel
Keywords ball mills grinding circuit process control i introduction grinding in ball mills is an important technological process applied to reduce the size of particles which may have different nature and a wide diversity of physical mechanical and chemical characteristics typical examples are the various ores minerals limestone etc
Apr 24 2015 ball mill consist of a hollow cylindrical shell rotating about its axis axis of the shell horizontal or at small angle to the horizontal it is partially filled with balls made up of steelstainless steel or rubber inner surface of the shell is lined with abrasion resistant materials such as manganesesteel or rubber length of the mill is
The rods grind the ore by tumbling within the the mill similar to the grinding balls in a ball mill to prevent the conditions leading to rod charge tangling the length to diameter ratio is maintained at 14 to 16 rod mills accept feed up to about 50 mm 2 in and produce a product in the size range of 3000 to 270 mm 4 to 35 mesh
Factors for feed size and pebble ing are applied to the agsag specific energy as well as specific crush energy adjustment from 17 mm to the mill transfer size t 80 using bonds law starkey larbi 2012 the bond equation is used to calculate ball mill specific energy from t 80 to the final product p 80 size
Investigations were carried out in a laboratory ball mill having the size of dxl 160x200 mm with a ribbed inside surface of the drum the mill ball loading was 40 by volume the rotation rate was equal to 85 of the critical speed balls were made from steel s4146 extra high quality having hardness 62 2 hrc according to rockwell
Mar 10 2011 re how can i calculate new ball size and weight desing for ball mill hi we have a similar mill pregrinding with hammer crusher and monochamber mill thisis what a proposed based on literture review i did and others agree its more and less correct but remember it all depends on your mill feed size after pregrinding
Calculating of volume in ball mill capacity influence of feed size on agsag mill performance am doing research in ball mill calculation of cement ball mill capacity increasing effectiveness of ball mill performance ferrous metallurgy cement clinker is usually ground using a ball mill bogue calculation milling
A ball mill also known as pebble mill or tumbling mill is a milling machine that consists of a hallow cylinder containing balls mounted on a metallic frame such that it can be rotated along its longitudinal axis the balls which could be of different diameter occupy 30 50 of the mill volume and its size depends on the feed and mill size
Horizontal ball mill capacity 1 30 tph size dia 12 to 28 meters x long 3 to 14 meters brand laxmi feed size 15 mm output size 170 mesh 90 micron drive tefc slpr motor through double stage helical gear box
Factors for feed size and pebble ing are applied to the agsag specific energy as well as specific crush energy adjustment from 17 mm to the mill transfer size t 80 using bonds law starkey larbi 2012 the bond equation is used to calculate ball mill specific energy from t 80 to the final product p 80 size
Mar 10 2011 re how can i calculate new ball size and weight desing for ball mill hi we have a similar mill pregrinding with hammer crusher and monochamber mill thisis what a proposed based on literture review i did and others agree its more and less correct but remember it all depends on your mill feed size after pregrinding
The rod mill was needed to reduce feed size to the ball mill because crushing this lowers the available power rate and hence the reduction ratio finite calculations can now be made for the following parameters some of contact us how ball mill ore feed size affects tonnage capacity jul 26 2017 the rod mill was needed to reduce
Feed size is usually inch or less product size ranges from 500 to below 5 ball mills work well on hard brittle materials they are not as suitable for grinding elastic ductile or fibrous materials or for fine grinding in general ball mills can blend and grind at the same time yielding a fine intimate mixture
Keywords ball mills grinding circuit process control i introduction grinding in ball mills is an important technological process applied to reduce the size of particles which may have different nature and a wide diversity of physical mechanical and chemical characteristics typical examples are the various ores minerals limestone etc
Optimization of mill performance by using online ball and pulp measurements soon after a stop a mill is a dangerous place to enter for the personnel tasked with taking measurements or samples crash stops are difficult to handle the mill and all feed streams should be stopped simultaneously but often they are stopped around about the same time
Shaft powers required to drive the mill at the specified capacity and also to size the mill after the fabrication of the ball mill grinding test was conducted with the mill using limestone as the feed material this was followed by the particle size analysis of the ground product from the mill in order to determine the performance of the mill
Dec 03 2010 re ball mill load feed dear gks you are correct in stating that main drive kw only increase when less grinding media charge and small size of grinding media wrt feed size and feed rate however it was to be stated in my reply that kwht of material increases in chocked condition of the mill as there is no output from the mill warm regards
The rods grind the ore by tumbling within the the mill similar to the grinding balls in a ball mill to prevent the conditions leading to rod charge tangling the length to diameter ratio is maintained at 14 to 16 rod mills accept feed up to about 50 mm 2 in and produce a product in the size range of 3000 to 270 mm 4 to 35 mesh
Cement ball mill is commonly used crushing equipment in the industry the statistics on the output of the ball mill in actual production is an important basis for the reporttype statistics of the production workshop the data is mainly the statistics of the production of different shifts and the output of the ball mill and we usually calculate the capacity of the mill
A rod mill feed conveyor 4 accepts all of the ore from these feeder belts for ultimate transfer to the rod mill this conveyor is normally equipped with a weightometer 5 to monitor the flow rate of ore to the rod mill and ultimately to allow control of this flow
Higher capacity than ag mill grinding primary coarse grinding up to 400 mm feed size grinding media is grinding feed plus 412 ball charge ball dia100 125 mm high capacity short retention time less sensitive to feed composition critical size material semiautogenous mill note the size of the mill why does the diameter need to be
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