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Calculate and Select Ball Mill Ball Size for Optimum Grinding Based on his work this formula can be derived for ball diameter sizing and selection Dm 6 log dk d05 where D m the diameter of the singlesized balls in mmd the diameter of the largest chunks of ore in the mill feed in mm
Aug 30 2019 · 2 Calculation of Power Speed and Medium Loading of Ball Mill 21 Power calculation G’ the quantity of loading medium and material T Dm effective inner diameter of mill barrel m K’5 grinding medium coefficient check table 19 Table 19 Grinding Medium Coefficient K’ 5
Learn MoreBall mill power draw predicted from the Denver slide rule kW 0 200 400 600 Calculated ballmill power draw from the m odel derived kW Data compared Line yx Fig 2 Comparison of the ball mill power draw from the Denver slide rule and the proposed model Dashed line corresponds to yx
Learn Moreball mill specific energy calculate Gold Ore Crusher 2012828 Calculation of the power draw of dry multicompartment ball mills 229 In order to design a ball mill and to calculate the specific energy o
Learn MoreThe Power Consumption Calculation of a Ball Drum Mill Idosi The Power Consumption Calculation of a Ball Drum Mill Vasily Stepanovich Bogdanov in the power transmission from a
Learn MoreCalculation of the power draw of dry multicompartment ball mills 225 The mill load that is the volume of charge in the mill is the principal determinant of power draw Estimation of the ball load that is mixed with the cement charge is difficult and can be highly erroneous
Learn MoreMills usually operate in the range 65 82 of critical but values as high as 90 are sometimes used A crucial parameter that defines the performance of a mill is the energy consumption The power supplied to the mill is used primarily to lift the load medium and charge Additional power is required to keep the mill rotating 813 Power drawn by ball semiautogenous and autogenous mills
Learn MoreAGSAG mills in the data base are up to 40ft in diameter and ball mills are up to 26ft in diameter The measured gross power draws from these mills are plotted against the model predictions in Figure 1 As indicated by this data base the accuracy of the model 1 standard deviation is 46
Learn MoreThe maximum power draw in ball mill is when ball bed is 3540 by volume in whole empty mill volume Considering that ball bed has a porosity of 40 the actual ball volume is considered to be
Learn MoreThe ball ﬁ mill work index is con rmed at 16 kWht The operating ﬁ work index though is in the range of 21 kWht to 25 kWht showing high inefﬁ ciency This raises the point that in some cases the Bond EF4 oversize factor calculation is not suf cient to compensate ﬁ for the milling inef ciencies that arise
Learn MoreThe ball mill motor power requirement calculated above as 1400 HP is the power that must be applied at the mill drive in order to grind the tonnage of feed from one size distribution The
Learn MoreIntroduction Rods are 150mm shorter than the mill length Breakage occurs more from cascading than cateracting The product size distribution is narrower than a ball mill but significantly coarser Most are overflow discharge type Lengthtodiameter 14 to 23 Mill length 7 meters
Learn MoreThe desired throughput of the mill is multiplied by the specific energy to give the mill power requirement approach acknowledges grinding efficiency as the ratio of operating work index to that for a singlestage The Bond equation is used to calculate ball mill specific energy from T 80 to the final product P
Learn MoreMar 08 2013 · 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
Learn MoreBall Mill Design A survey of Australian processing plants revealed a maximum ball mill diameter of 524 meters and length of 884 meters Morrell 1996 Autogenous mills range up to 12 meters in diameter The lengthtodiameter ratios in the previous table are for normal applications For primary grinding the ratio could vary between 11and 181
Learn MoreTube mills have a ratio of length to diameter of 36 1 for ball mill Get Price Scaleup of power consumption in agitated ball mills Wiley Online of introducing power into the mill so as to obtain a given specific energy input For this of the disk stirrer in an agitated ball mill can be calculated using Ball Mill Design
Learn MoreIn this section ball abrasion was calculated via manufactures ball charge program At the time of this research mill ball charged feed rate and average moisture were 7 tons ball size was 100 mm per week 720 th and 5 respectively Then ball abrasion rate was calculated by Equations 4 5 and 6
Learn Moreball mill calculation power calculation central drive ball mill torque and power calculation pdf ball mills for wet and dry grinding in the minerals industry search Development Centre and power Ball mills autogenous mills and semiautogenous mills from Thys senKrupp The ring motor features noncontact transmission of the driving torque to the mill shell by means of Highperformance
Learn Morebase are up to 40ft in diameter and ball mills are up to 26ft in diameter The measured gross power draws from these mills are plotted against the model predictions in Figure 1 As indicated by this data base the accuracy of the model 1 standard deviation is 46 How to Use the Model Inputs to the model are made in three windows viz
Learn Morecorrection factor to resultant power and deducting the ball milling component of the power refer to Equation 2 The approach requires the feed size to the SAG the SAG mill product size transfer size and the final product size The prediction of the SAG mill transfer size used in the formula is made by
Learn MorePopular Answers 1 Ball size depends on initial size of charge and ranges from 10mm150mm dia For particular material and initial size the ball size must be optimized Please refer the link below and see if it works for you and other method is hit and trial
Learn MoreTube mills have a ratio of length to diameter of 36 1 for ball mill Get Price Scaleup of power consumption in agitated ball mills Wiley Online of introducing power into the mill so as to obtain a given specific energy input For this of the disk stirrer in an agitated ball mill can be calculated using Ball Mill Design
Learn Moreball mill calculation power calculation central drive ball mill torque and power calculation pdf ball mills for wet and dry grinding in the minerals industry search Development Centre and power Ball mills autogenous mills and semiautogenous mills from Thys senKrupp The ring motor features noncontact transmission of the driving torque to the mill shell by means of Highperformance
Learn MoreA ball mill is a type of grinder used to grind blend and sometimes for mixing of materials for use in mineral dressing processes paints pyrotechnics ceramics and selective laser sintering It works on the principle of impact and attrition size reduction is done by impact as
Learn MoreThe grindingproduct size P in a Bond ball mill which is given by the aperture size which passes 80 of the grinding product as a function of the aperture size of the test screen P k can be expressed by the formula P P k K 2
Learn MorePlease find below two calculators for sizing mills using the Bond and Rowland methods Ball mill sizing Calculator for ball mills in a single stage circuit Rod ball mill sizing Calculator for rod mills as first stage of the circuit and ball mills as second stage of the circuit
Learn MorePopular Answers 1 Ball size depends on initial size of charge and ranges from 10mm150mm dia For particular material and initial size the ball size must be optimized Please refer the link below and see if it works for you and other method is hit and trial
Learn Morecalculation in filling ratio for ball mill filling ratio in ball mill calculation in filling ratio for ball mill The Ball Mill Filling Ratio Automatic Ball mill is the main equipment of ore dressing process and it is widely used in mining metallurgy building materials refractory cement chemical and thermal Get More
Learn MoreInvestigations 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
Learn MoreThe grindingproduct size P in a Bond ball mill which is given by the aperture size which passes 80 of the grinding product as a function of the aperture size of the test screen P k can be expressed by the formula P P k K 2
Learn More