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Get PriceCalculate a Mills Operating Work Index 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
bond index for vertical mills Bond Work Index FormulaEquation 911metallurgist Basic EquationsSize Distribution and Exposure RatioEquations For Work Index VariationsWork Index and Crack Energy The basic work index equation isW 10 WiP 10 WiF1where W is the work input required in kilowatt hours per short ton to grind from 80 passing F microns to 80 passing P microns and Wi
read the restThe Bond ball mill work index test is thought to be additive because of its units of energy nevertheless experimental blending results show a nonadditive behavior The SPIR value is known not to be an additive parameter however errors introduced by block kriging are not thought to be significant
read the restCalculate a Mills Operating Work Index 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
read the restzFrom the distribution of the points around the line of comparison the good agreement of the results received is obvious 0 200 400 600 Ball 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
read the restBall Mill Work Index Calculation For any circuit whether a crushing circuit a rod mill or a closed ball mill circuit the Work Index always means the equivalent amount of energy Get Price Procedure for determination of ball Bond work index in Details Application Of Operating Work Indices In Autogenous
read the restOct 03 2015 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 the necessary metallurgical testing to determine the grinding characteristics of ores and power requirements for operating productionsize rod mills
read the restMining Mill Product Size Calculation Rod ball mill sizing Calculator for rod mills as first stage of the circuit and ball mills as second stage of the ball size calculation for ball mill Laboratory Ball Mill For Bond Work Index Procedure And Method Xmgb Work in the ball mill and steel balls of a certain size and number are put into the
read the restJun 28 2019 Bond Work Index FormulaEquation See this useful summary Table of Bond Work Index by Minerals For any circuit whether a crushing circuit a rod mill or a closed ball mill circuit the Work Index always means the equivalent amount of energy to reduce one ton of the ore from a very large size to 100 um
read the restBond Rod Mill Index Test Measuring ore grindability in rod mills The Bond Rod Mill Work Index is a measure of the resistance of the material to grinding in a rod mill It can be used to determine the grinding power required for a given throughput of material under rod mill grinding conditions It is a locked cycle test conducted in closed
read the restThe test determines the Bond Rod Mill Work Index which is used with Bonds Third Theory of Comminution to calculate net power requirements when sizing ball mills Various correction factors may have to be applied The test is a closedcircuit dry grindability test performed in a standard rod mill
read the restBall 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 F80 and maximum chunk size product size as P80 and maximum and
read the restW is the work index measured in a laboratory ball mill kilowatthours per metric or short ton P 80 is the mill circuit product size in micrometers F 80 is the mill circuit feed size in micrometers Rod mill A rotating drum causes friction and attrition between steel rods and ore particles
read the restCapacity Calculation For Rod MillContinuous Mining Rod Mill grinding medium for grinding rods it is generally believed grinding rods should not be more thanmeters in length wound caused by the long grinding bar is easy therefore used in the rod mill the length is not too long grinding rod
read the restBasic EquationsSize Distribution and Exposure RatioEquations For Work Index VariationsWork Index and Crack Energy The basic work index equation isW 10 WiP 10 WiF1where W is the work input required in kilowatt hours per short ton to grind from 80 passing F microns to 80 passing P microns and Wi is the work index or the grinding resistance parameter
read the restcrushers and grinding mills is ores work index which is experimentally calculated The work index w i is a parameter which presents the ore grindability and is used in Bond fo
read the restThe mill product can either be finished size ready for processing or an intermediate size ready for final grinding in a rod mill ball mill or pebble mill AGSAG mills can accomplish the same size reduction work as two or three stages of crushing and screening a rod mill and some or all of the work of a ball mill
read the restBall 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 F80 and maximum chunk size product size as P80 and maximum and
read the restlaw for crushing mills Grinding Mill China bonds rod mill for work index India oxide type gold ore bonds rod mill for work index bonds law for Bond Work Index FormulaEquation See this useful summary Table of Bond Work Index by Minerals
read the restbond rod mill work index essa bond ball mill work index equation in wills Bond Work Index FormulaEquation See this useful summary Table of Bond Work Index by Minerals For any circuit whether a crushing circuit a rod mill or a closed ball mill circuit the Work Index always means the equivalent amount of energy to reduce one ton of the
read the restA 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 Mill Work Index test feed
read the restFor every Bond Rod Mill Work Index test carried out at JKTech a standard report is issued The report details the Bond test procedure method and presents the results including F80 P80 Grindability and Work Index Further interpretation of the results is available if required
read the restThe test work index of the feed to a rod mill was 101 kWht Eighty percent of the feed passed 2 mm and 80 of the product from the mill passed 40 m The mill diameter was 39 m and the LD ratio was 14 The formal loading factor initially was 035 but later altered to 045 Estimate the change in grinding capacity of the mill 88
read the restThe rod mill work index laboratory test is conducted by grinding an ore sample prepared to 80 passing 127 mm inch the original test being developed in imperial units to a product size of approximately 1 mm in the original and still the standard 14 mesh see Chapter 4 for definition of mesh thus determining the rod mill work index Wi R or RWi
read the restIndex BWi the Rod Mill Work Index RWi the Crusher Work Index CWi and the Abrasion Index Ai Over the years it has been determined that Efficiency Factors EF1 to EF9 should be applied to
read the restIndices It is also the Bond design Work Index for this circuit To avoid the introduction of any designinefficiency factors in the Bond reference standard circuit assume 8 foot 244 m diameter overflow mills and use a rod mill feed size F80 of 16000 m and a rod mill product size of 1000 m
read the restThe Bond rod mill work index is not as common as the Bond ball mill work index and there are two different variations on the mill models expect a mill with a wave liner and is not compatible with mills using smooth liners
read the restThe mill power is 225 Watts calculated by 6 Fi P nally the product is wet screened to find the size d80 24 Rod Mill Semi Continuous Process The same mill is used for the semi continuous grinding tests which is similar to the Bond test but with the exist ing mill of known power After time the mill product
read the restin 1 By rearranging the formula to 2 the operating work index Wio of an existing grinding circuit can be calculated given known mill power draw throughput feed and product size distributions kWht Power applied per ton of feed to the grinding unit Wi The standard Bond work index of the ore P 80 The 80 cumulative passing size
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