Ball Mill DesignPower Calculation
Dec 12 2016 · If P is less than 80 passing 70 microns power consumption will be Ball Mill Power Calculation Example A wet grinding ball mill in closed circuit is
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[email protected]Jan 01 2015 · This distribution affects the SAG mill load and the load affects directly the mill power and the efficiency of the mill operation Van Nierop and Moys 2001 If a SAG mill has been designed with a conventional power or specific energy model which do not consider the projected feed size distribution it is likely that this mill will reach the
Get PriceDec 12 2016 · If P is less than 80 passing 70 microns power consumption will be Ball Mill Power Calculation Example A wet grinding ball mill in closed circuit is
Enter the width of a mill shell liner Note this is not the width of a lifter You may use the Mill Liner Effective Width calculation to determine this value The mill critical speed will be calculated based on the diameter above less twice this shell liner width Mill Actual RPM Enter the measured mill rotation in revolutions per minute
Jan 01 2016 · the cost in power to run the mill if the power cost is 2778 per GJ 99 An SAG mill of diameter 90 m and width 60 m was charged to 40 of the mill volume with ore of SG 32 when the porosity was 38 With grinding time the ball load changed from 10 to 5 and the bed porosity to 12
Sag Mill Power Calculations livemarketcalls sag mill power calculations The sag power index spi test starkey dobby 1996 uses a benchscale sag mill test to determine the specific energy of an industrial sag mill the test is operated in closed circuit and the time required to grind the material to a p 80 of 17 mm is used to predict agsag
to include SAG and Ball milling The hardness of each sample was measured in terms of SAG power index SPI for SAG grinding and Bond Ball mill work index BWi for ball mill grinding A further measure the Minnovex crusher index Ci was also measured for use in the CEET program to determine SAG mill feed size Kosick and Bennett 2001
Outotec has delivered everything from small lowcost singlestage SAG mills to the largest mill in the world – with a 40foot diameter and 28 MW of motor power Ball mills Ball milling is the most common application for horizontal tumbling mills Outotec offers a full range of ball mills to
– Hourly Cost w Labor This is the final number to come from the calculation The numbers in the example were for a Haas Mini Mill that I just took the information of their web site for You can find the Machine Hourly Rate Calculator on the Machine Profile under the Setup Basics tab Each machine has an Hourly Rate field
to include SAG and Ball milling The hardness of each sample was measured in terms of SAG power index SPI for SAG grinding and Bond Ball mill work index BWi for ball mill grinding A further measure the Minnovex crusher index Ci was also measured for use in the CEET program to determine SAG mill feed size Kosick and Bennett 2001
Outotec has delivered everything from small lowcost singlestage SAG mills to the largest mill in the world – with a 40foot diameter and 28 MW of motor power Ball mills Ball milling is the most common application for horizontal tumbling mills Outotec offers a full range of ball mills to
The SAG mill pinion energy is determined from the SAGDesign testwork results as follows W SDT revs 16000 m s 4473 m s where W SDT AGSAG Specific Pinion Energy from a F 80 of 1524 mm to a T 80 of 17 mm kWhton ground revs Cumulative number of SAG test mill revolutions to 80 passing 17mm m s SAG mill feed sampleget
SAG mill 4 ball charge 90 Nc A cross between AG and SAG for average competency abrasive ores Typically operated in RSA on Witwatersrand Gold Ore Driefontein Underground Kloof Jacobina 6 SAG mill with recycle crusher 8 – 15 ball charge Competent ores better suited to coarse grind sizes High aspect mills are recommended to
Oct 12 2017 · SAG mill make use of steel balls included with some large and hard rocks for grinding These mills utilize the balls in making the large fragments of materials broken into pieces The ball charge of a SAG mill is about 9 to 20This process takes place inside the large rotating drum of SAG mill which is filled with balls partially
the SAG mill critical speed Pc SAG mill power consumption kW 600 100 of the fresh feed in the size range 152 25 mm M Silva A CasaliMinerals Engineering 70 2015 156–161 157 In fact the later can be modelled as a function of the others
It is the sound of rising costs by the hour both from the downtime itself and from maintenance costs Optimising the capacity of your SAG mill is crucial to avoiding downtime and liner wear and damage With variances in mill ore feed rate mill speed and slurry density critical impacts can occur in your SAG mill
Unlike Cadia and Sossego Phoenixs issues were only overcome with the addition of secondary crushing prior to SAG milling 67 64 EGL m 95 98 100 Power MW 9 16 7 Specific energy kWht 795 8
SAG mill continually pump the finer material out of the mill lowering over 75 of mill rated power A locked charge mitigating start procedure must be utilized if the consideration when mill sizing calculations are performed Many projects request a mill considerably
Figure 511 Power variation with mill speed for different media shapes J1586 Figure 512 Power variation with mill speed for different media shapes J2087 Figure 513 Power variation with mill speed for different media shapes J2587 Figure 514 Variation of mill power draw with mill filling J cylpebs media88
Safe and speedy replacement Thinner mill liners result in a larger volume inside the mill This means you can have a higher charge level Using composite liners also cuts the weight of the liners to about 50 percent of standard steel cast liners making it possible to work with a higher ball charge level without increasing the total weight of the mill