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work indices for the AGSAG mill and ball mill can be reorganised as 7 and 8 where BWio and AWio are the corrected operating work indices and WAGSAG WBM are the respective power draw of AGSAG and ball mills. Note that the ball mill operating work index is applied only on the portion that needs the additional grinding Q2
Read MoreThe materials of certain granularity and weight are placed in the ball mill and steel balls of a certain size and number are put into the ball mill. Then carry out dry grinding at specific rpm sieve and weigh products repeatedly and obtain the grinding work index kwht through calculation.
Read MoreDec 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 .
Read MoreIt provides the Bond Ball Mill Work Index which expresses the resistance of material to ball milling. This happens after 7–10 grinding cycles which shows that the procedure is a lengthy and .
Read MoreSep 17 2020 The Bond Ball Mill Work Index remains today as the only tool used for ball mill scaleup design. For an only nominally not at all materially modified update on its use for industrial mill sizing see Selection of Rod Mills Ball Mills Pebble Mills and Regrind Mills Rowland C. A. Jr. 1982 Chapter 23 Design and Installation of .
Read MoreKinetic grinding test approach to estimate the ball mill work index 345 Kinetic grinding Exactly 700 cm3 of 100 passing 3.35 mm material from each sample was progressively grounded in periods of 0.33 1 2 4 and 8 minutes. Our experience has shown that the required number of revolutions to achieve the circulating load of 250
Read MoreApr 01 2016 The amount of feed was set at 1175 g which was proportional to industrial scale.The ball mill speed was constantly set at 76.8 Cs.Experiments were conducted at different ball sizes between 20 and 40 mm grinding time 10–30 min solids content 65–80 and work index of copper sulphide ore 12–15.4.RSM and Box–Behnken design were used for the experimental design and modeling of .
Read More2 MODELLING THE SPECIFIC GRINDING ENERGY AND BALLMILL SCALEUP Ballmill scale up Bonds LawData zBond work index w i zFeed D f and product d size both 80 cumulative passing Result The specific grinding energy w Mill power draw P wT where T the mill capacity Mill dimensions from Tables or charts
Read MoreHowever in this situation the ball mill has to supply this energy and it has a different higher work index than the crusher ie the ball mill is less energy efficient than a crusher and has to input more energy to do the same amount of size reduction. Hence from equation 7 to crush to the ball mill
Read MoreFor example a grinding circuit is processing 450 th of dry feed with a mill drawing 3150 kW at the pinion. The circuit feed is 80 passing 2500 um and the circuit product is 80 passing 212 um. Then WIo the Operating Work Index of this circuit is calculated as follows So for this circuit on this ore
Read MoreBond Test WIs kWht Rod Mill Ball Mill 9.5 kWht.8 9 kWht . Bond Standard Circuit Work Index Assume the rod mill Work Index of 9.5 applies from the actual rod mill feed sizeof 19300 m although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16000 m to a rod
Read MoreThe Bonds BallMill Work Index is a measure of the resistance of the material to grinding in a ball mill. This Index is widely used in the industry for comparing the resistance of different materials to ball milling for estimating the energy required for grinding and for ball mill scaleup.
Read MoreLimestone grinding work inde for grinding the mill bond work index for limestone amp 39 s rod mill for work indexrockisland the bond ball mill work index is a measure of the resistance of the material to grinding in a ball mill bond mill work index of limestone smith bond e online. Online Chat Mill Limestone Mill Less Than 1 Mm
Read MoreThe 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 .
Read MoreThe ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100 passing 3.36 mm 6 mesh to product size in the range of 45150 m 325100 mesh thus determining the ball mill work index WiB or BWi.
Read Morea new app roach toward estimating the Bond ball mill work index BBWI b y applying a series of kinetic grinding tests with Bond standard mill. Establishin g a series of relationships between.
Read MoreThe Bonds BallMill Work Index is a measure of the resistance of the material to grinding in a ball mill. This Index is widely used in the industry for comparing the resistance of different materials to ball milling for estimating the energy required for grinding and for ball mill scaleup.
Read Morework indices for the AGSAG mill and ball mill can be reorganised as 7 and 8 where BWio and AWio are the corrected operating work indices and WAGSAG WBM are the respective power draw of AGSAG and ball mills. Note that the ball mill operating work index is applied only on the portion that needs the additional grinding Q2
Read MoreThe Bond ball mill grindability test is run in a laboratory until a circulating load of 250 is developed. It provides the Bond Ball Mill Work Index which expresses the resistance of material to.
Read MoreBond Ball Mill Grindability Test 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
Read MoreDear all Have a good day I am trying to determine ball mill work index for a very soft . If I follow bonds procedure to do experiment not able to determine. The following is the data of ore sample. F80 2300mic Mesh of grind 300mic 300mic in feed 47 In this case if the sample is gri
Read MoreThe Bonds BallMill Work Index is a measure of the resistance of the material to grinding in a ball mill. This Index is widely used in the industry for comparing the resistance of different materials to ball milling for estimating the energy required for grinding and for ball mill scaleup.
Read MoreEquations for power draft capacity and work input for predicting the performance of industrial grinding mills are derived based on torque measurements using a laboratory instrumented mill. These derivations are based on mechanical principles and on the firstorder kinetics of the grinding process. Rittingers Kicks and Bonds laws express work input as work index Wi times a particle .
Read MoreThe ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100 passing 3.36 mm 6 mesh to product size in the range of 45150 m 325100 mesh thus determining the ball mill work index Wi B or BWi.
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