Processing capacity:238-471t/h
Feeding size:≤20mm
Appliable Materials: quartz,ore dressing of ferrous metal,iron ore,ore,construction rubbish,cement clinker etc. All grindable materials, various metal ores, non-metallic ores, non-flammable and explosive materials
Ball mill design requires a bond work index bwi for ball mills at the correct passing size sag mill design requires an appropriate sag test for example spi chapter 5 flotation design needs a valid measure of kinetics for each sample including the maximum attainable recovery and rate constants for each mineral chapter 12
Jun 06 2015 this grindability test or bond ball mill work index procedure is used to determine the bond work index of minus six mesh or finer feed ore samples these equation application methods are used to process 12 ore samples in a ball mill using a standard ball charge below describes in general terms the bond work index procedure used by a professional metallurgical testing laboratory
Jun 19 2015 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 f80 and maximum chunk size product size as p80 and maximum and finally the type of circuit openclosed
In the design of a grinding circuit the work index is used when determining the size of the mill and grinding power required to produce the required ore throughput in a ball mill 2 procedure 21 bond ball mill grindability the sample was crushed to 100 passing 6 mesh 335mm from this a 700 cc volume was measured and weighed to be used
The bond ball mill work index bbwi test is carried out in a standardised ball mill with a predefined media and ore charge the work index calculated from the testing can be used in the design and analysis of ball mill circuits the test requires a minimum of 10kg of sample that has been stagecrushed to 100 passing size of 335 mm
Mar 14 2015 use this online formula to calculate a ball mill rod mill or sag mill operating work index based on fred bonds work you can estimate the energy used into your grinding circuit this is the most accurate and informative method but much of the data necessary for its application is not yet available a total apparent volumetric charge filling including balls and excess slurry on top of the ball
Dec 12 2016 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
Ball mill design requires a bond work index bwi for ball mills at the correct passing size sag mill design requires an appropriate sag test for example spi chapter 5 flotation design needs a valid measure of kinetics for each sample including the maximum attainable recovery and rate constants for each mineral chapter 12
Jun 06 2015 this grindability test or bond ball mill work index procedure is used to determine the bond work index of minus six mesh or finer feed ore samples these equation application methods are used to process 12 ore samples in a ball mill using a standard ball charge below describes in general terms the bond work index procedure used by a professional metallurgical testing laboratory
Jun 19 2015 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 f80 and maximum chunk size product size as p80 and maximum and finally the type of circuit openclosed
In the design of a grinding circuit the work index is used when determining the size of the mill and grinding power required to produce the required ore throughput in a ball mill 2 procedure 21 bond ball mill grindability the sample was crushed to 100 passing 6 mesh 335mm from this a 700 cc volume was measured and weighed to be used
The bond ball mill work index bbwi test is carried out in a standardised ball mill with a predefined media and ore charge the work index calculated from the testing can be used in the design and analysis of ball mill circuits the test requires a minimum of 10kg of sample that has been stagecrushed to 100 passing size of 335 mm
Mar 14 2015 use this online formula to calculate a ball mill rod mill or sag mill operating work index based on fred bonds work you can estimate the energy used into your grinding circuit this is the most accurate and informative method but much of the data necessary for its application is not yet available a total apparent volumetric charge filling including balls and excess slurry on top of the ball
Dec 12 2016 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
Milling equipment bonds work index ball mill manufactuering design and bonds a class of machinery and equipment that can be used to meet the production requirements of coarse grinding fine grinding and super fine grinding in the field of industrial grindingthe finished product can be controlled freely from 0 to 3000 mesh
Bond ball mill 5 october 2015 labpilot plant equipment this 12 x 12 ball mill is universally used for grindability testing and determination of the bond work index mill comes complete with ball charge and control panel with automatic revolution counter
The work index depending on the grind size in this way work index values are usually obtained for some specific grind size that characterizes the grinding operation to design or under evaluation this study was carried out in a standard bond ball mill 305 mm x 305 mm size
Ball mill design requires a bond work index bwi for ball mills at the correct passing size sag mill design requires an appropriate sag test for example spi chapter 5 flotation design needs a valid measure of kinetics for each sample including the maximum attainable recovery and rate constants for each mineral chapter 12
Micrometers in size according to the bond standard procedure the work index is determined by simulating a dry grinding in a closed circuit in the bond ball mill to achieve 250 circulating load bond 1949 1952 1961 the test is performed on a raw material approximately weighing 10 kg which coarseness is 100 3327 mm
Bond ball mill index test jktech a bond ball mill work index may also be used in the simulation and optimisation of existing mills and the associated grinding circuits sample requirements a minimum of 8 kg of material crushed to nominally minus 10 mm is preferred jktech would stage crush the sample to minus 335 mm as required for the bond ball
First a jar mill grindability test requires a 5 lb 2 kg sample and produces a direct measured specific energy net hphrt to grind from the design feed size to the required product size the second test a bond work index determination results in a specific energy value net hphrt from an empirical formula
Bond s work index ball mill inner liners design ball mill designpower calculation linkedinoperating parameters of ball mill dec 12 2016 the basic parameters used in ball mill design power calculations rod mill or any tumbling mill sizing are material to be ground
Dec 10 2016 for the evaluation of laboratory and industrial experiments the work index can be determined as follows 1 bwi 445 p 1 023 g 082 10 p 10 f where bwi bonds work index kwhsh ton f 80 passing size of original feed m p 80 passing size of circuit product m p1 testsieve size m and g net grams of sieve undersize per mill revolution
W bonds work index kwht p 80 particle diameter of product 80 passing m f 80 particle diameter of feed 80 passing m o the bonds work index of a material which is commonly used in the british commonwealth as well as us is determined in a standard laboratory ball mill but the test is cumbersome to perform
The bond ball mill work index bwi data were used to determine the ball mill power requirement table 1 summarises the 75th percentile values for the various comminution parameters used to determine plant throughput and mill power draw a more complete list of comminution data is provided in appendix 1
Measured and the bond work index bwi is calculated as follows where p1 is the aperture of the closing screen in microns and f 80 and p 80 are the 80 passing sizes of the test feed and product the world relies widely on the ball mill work index for the design and analysis of ball mill
Mar 01 2020 two parameters can be used to represent intact rock properties for predicting the comminution efficiency tensile strength ts and bond work index bwi ts is fundamental to the crackopening stages of crushing and bwi is an intrinsic material characteristic for the fine grinding process these two parameters are inversely proportional to the energy efficiencies for crushing and grinding
The titan bond work index rod mill is onepiece cast construction with integral wave liners of a form described by bond this mill is used to perform labpilot plant equipment labpilot plant equipment mills
Sep 12 2019 however this requires a significant amount of ore samples a lot of labor and the pilot plants fred bond published an article in 1961 which described the procedure for testing ores for a bond ball index this parameter is still one of the most demanded tools in the design evaluation and optimization of ball grinding plants around the world
Ball mill grindability the test mesh used was 100 mesh p 1416 the bond work index w i was calculated from equation 2 w i 445p 1 023 x gbp 082 10p 80 05 05 10f 80 2 where f 80 is the size in m at which 80 percent of the new feed to ball mill passes
Jk bond ball mill test since its introduction in the 1960s the bond ball mill work index bbmwi parameter has been extensively used in predicting ball mill power draw use of work index along with comminution circuit design the work index parameter is widely used in tracking mill performance due to the age and lack of controls for the test
The proposed model combined with a model giving the ballmill power draw is used for the ballmill scale up comparisons with the bond procedure showed a good agreement for the prediction of the
21 conclusions continued in the present work equations were also derived giving zthe ballmill power drawp as a function of its dimensions internal mill diameter d and length l zthe ballmill power drawp as a function of the feed d f mm and the product size d mm the bond work index w i kwhshort ton and the mill throughput t short tonh zthe ballmill dimensions d and l when
Oct 24 2018 the work index can either be measured in the laboratory the bond ball mill work index determination is a common example or it can be calculated from the operating performance of a milling
Bond s work index ball mill inner liners design ball mill designpower calculation linkedinoperating parameters of ball mill dec 12 2016 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
Dec 10 2016 for the evaluation of laboratory and industrial experiments the work index can be determined as follows 1 bwi 445 p 1 023 g 082 10 p 10 f where bwi bonds work index kwhsh ton f 80 passing size of original feed m p 80 passing size of circuit product m p1 testsieve size m and g net grams of sieve undersize per mill revolution
The widespread occurrence of bonds theory is owing to bonds method of ore strength assessment that allows finding work indexes under laboratory conditions 4 theoretically the work index equals the amount of energy kwht consumed to comminute 1 t of infinite size material down to 80 content of 100 m size grade
Involve grinding with lloyds ball milling book having sold over 2000 copies there are probably over 1000 home built ball mills operating in just america alone this article borrows from lloyds research which was obtained from the commercial ball milling industry and explains some of the key design criteria for making your own ball mill
the bond ball mill work indices determinations gave reasonably reproducible results significant variation was observed in the measurement of the bond rod mill work index on at least one sample tested and large variations in abrasion index and crushing work index were due to variations in the test method across the laboratories
First a jar mill grindability test requires a 5 lb 2 kg sample and produces a direct measured specific energy net hphrt to grind from the design feed size to the required product size the second test a bond work index determination results in a specific energy value
The bond standard circuit work index used for circuit design specific energy requirement at the drive pinions which is equal to the ores combined laboratory test work index these are equal tothe expected or design work index of the bond standard circuit which is theconventional crushingrodball
Cycle test akin to the bond ball mill work index determination the first cycle starts with minus 6 mesh ore removed since it is believed that the fines content can fill most of the voids allowing little room for rock breakage and piston movement without adequate piston
Dec 12 2016 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
Simplified bond work index determination by r o jauregui kaiser engineers international inc 300 lakeside drive oakland ca 94623 usa to design grinding circuits or evaluate their performance the bond theory of comrninution is used equation 1 is the mathematical statement of the third theory where w the energy input to the mill kwht wi work ind x kwht p square sieve
The grinding jar for the bond index rod mill is 12 x 24 in size and has a waveshaped design at least 15 to 20 kg sample material is required to simulate a closed grinding circuit in a ball or rod mill the rod mill work index rwi is used for particle size determination in a size range from 25 mm down to 21 mm whereas ball mill work index bwi is used for the range from 21 mm down to 100 m adjustment of
Ball mill grindability the test mesh used was 100 mesh p 1416 the bond work index w i was calculated from equation 2 w i 445p 1 023 x gbp 082 10p 80 05 05 10f 80 2 where f 80 is the size in m at which 80 percent of the new feed to ball mill passes
Nov 01 1998 austin lg klimpel rr and luckie pt 1984 process engineering of size reduction ball milling sme chapter 4 p76 google scholar bond fc 1952
Zthe ballmill dimensions internal mill diameter d and length l for a given ld ratio for feed size d f and product size d mm for a known bond work index w i kwhshort ton and for desirable capacity t short tonh can be calculated from d d t d d l f 35 0106 0193 0962 1038 09180 1
Iv conclusions and recommendations a sample ore was given and was crushed then underwent a series of grinding to achieve a 250 circulating load the bond work index was determined to be equal to 4138 kwhtone it is recommended that future researchers carefully handle the samples and use equipment such as the rotap sieve shaker instead of manual labor to avoid decrease in sample ore
The bond work index is a measure of ore resistance to crushing and grinding and is determined using the bond grindability test its value constitutes ore characteristic and is used for industrial
Wibm is the bond ball mill work index unitless cfnet is an empirical adjustment to a ball mill circuit cfnet 235 029 lnp80 morrell mi model morrell 2008 published a twoparameter model based on two equations 3 amp 4 to describe a variety of comminution devices including singlestage sag and ag mills the cee
In conjunction with the bond ball mill work index they can be used to accurately predict the overall specific energy requirements of circuits containing ag and sag mills ball mills rod mills crushers high pressure grinding rolls hpgr
Ball mill wio bwio 86 circuit wio owio 146 bond ball mill work index bwi kwht 134 bond rod mill work index rwi kwht 181 table 1 example of agsag ball mill circuit wio calculations 1 2 abstract optimum use of power in grinding both in terms of grinding efficiency and use of installed capital can have a large effect on
Introduction the bond work index for ball mill is a special equipment for testing bond ball mill work index simple lab test can choose ball mill by power method or judge the effects of material properties change to the ball milling process or the operation condition of crusher by using this equipment
Labpilot plant equipment labpilot plant equipment mills bond work index rod mill the titan bond work index rod mill is onepiece cast construction with integral wave liners of a form described by bond
It is measured by a rule that to compute the work file ball plant in light of yield of every unrest of the factory after the material is ground to an adjusted state by the predetermined plan this work index ball mill additionally called plant for measuring bond work record is a
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