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May 01 2021 The Bond work index BWI is a wellknown method used when selecting comminution equipment to evaluate the grinding efficiency and to calculate the required grinding power Although considered an industry standard Bond did not fully define that procedure and therefore significant discrepancies in test results can sometimes be obtained due to

Bond Rod Mill Grindability Test Grinding Solutions can carry out Bond Rod Mill Work Index tests to determine the energy requirements for milling ore in a rod mill The test requires a minimum of 20kg of 125mm material Closing screen sizes typically range from 475mm to 212 m Abrasion Index Test

Bond Grinding Circuit Efficiency Meeting of Bond Efficiency Guideline Working Group of the Global Mining and Standards Group Salt lake City 2014 Based on Presentation to the 2008 Meeting of SME by CA Rowland Jr and RE McIvor Bond Grinding Circuit Efficiency The Bond Work Index equation Ore test WI Circuit operating WI

grindability well in advance of when ore are actually mined Traditional measurements of ore grindability are the Bond Work Index Wi values Bond 1952 divided into a low energy crushing work index Wi C for coarse rocks 7550 mm a rod mill work index Wi RM for intermediate sized particles 253 mm and a ball mill work index Wi

measure ore grindability is the bond work index wi 3Numerically the work index is the energy required in Kwhshort tones to reduce a given material from theoretical infinite size to 80 passing of 100microns 4 The earlier methods of grindability test were the simple open circuit batch test this

Iron Ore Crusher Bond Index In Kuwait Iron ore crusher bond index in kuwait the bond work index is not solely a material constant but is influenced by the grinding conditions for example the finer the grind size desired the higher is the kwht required to grind to that size magdalinovic 38 measured the bond work index of three ore types using different test screen sizes he produced

Jan 14 2021 standard Bond crushing and rod mill work indices abrasion indices and by Dawson for Bond Ball Mill Work Index tests using crushed feed and Standard Autogenous Grinding Design SAGDesign Tests patented by Outokumpu See reference 8 below The comparison of these results gives context to how the various measurements relate to each

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

Jan 01 2016 The Bond work index is not solely a material constant but is influenced by the grinding conditions For example the finer the grind size desired the higher is the kWht required to grind to that size Magdalinovic measured the Bond work index of three ore types

Dec 07 2018 The test work program was carried out on those five ore samples obtained from the copperporphyry orebodies Total of 38 Bond work index tests including duplicates were done Standard Bond ball mill test procedure were carried out on crushed

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jected to particle size distribution after grinding The recorded energy together with the P 80 from the PSDs were used to calculate the work index based on Bonds third theory equation 1 Bond 1961 Where is the work index kWht W energy input kWht while and are the 80 of mill 9 79 19 89 A9 O9 G9 X9 Y9 W9 799 9

Lastly substituting all the values in equation 1 the Bond work index of the ore was determined to have a value of 4138 kWhtone The Bond work index in addition to it as being the measure of the materials hardness or resistance to crushing and grinding gives an important indication of the efficiency of the machine being used The larger the Bond work index the larger the consumption of

The most widely used parameter to measure ore grindability is the Bond work index W i 6 Work index is the energy required in kWhshortton to reduce a given material from theoretically infinite size to 80 passing size 100 microns 7 The determination of work index using Bonds method can be compared to the method of

Bond Work Index an overview ScienceDirect Topics The ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100 passing 336 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

Jul 30 2020 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 circuit with a laboratory

Iron Ore Crusher Bond Inde Exodus Mining Machine Bond grinding work index of indian iron ore youtube 24 dec 2013 crushing news ilmenite bond work index in chennai india bond work index of iron grindability work index for iron ore cone crushers read more Get Price Customer case 240TH Granite Crushing Line In Russia

May 28 2020 Hence to determine the behavior of different ores raw ores are grounded in a Bonds Ball Mill BBM which adopts the standard grinding procedures which help in the grinding analysis The ore physical grindability characteristics are identified based on the Bond Work Index BWI 9 10 to approximate the energy necessary for ore breakage

Apr 20 2020 Bond index mill is used to grind crushers in Chinese mines Iron ore crushing work index service chat online iron ore crushing work index 511 rotary crusher receives iron ore from a 15 meter top mine The working index of MIH HPGR ore can be 305mm grinding machine and jaw crusher with 305mm bond ball mill working wear index

Rudarskogeolokonaftni Zbornik 20200101 STUDYING THE EFFECT OF ORE TEXTURE ON THE BOND WORK INDEX AT THE MAHD AD DAHAB GOLD MINE A CASE STUDY

Generally Bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required power In the current research a simple fast and accurate procedure is introduced to find the

Case 1 Only 2 kilograms of Chilean copper ore were available for work index de termination The ore ho d already been stagecrushed to 10 mesh to be used bEnch scale flotation tests Even under these restric ticHs it still possible to calculate a work index for

Jan 01 2013 To calculate Bond rodmill work indices the four samples were screened and the particle size distributions plotted in Fig 2The plot was used to find F 80 of the samples for calculations Fig 3 Fig 4 show the grinding kinetics of Pb Cu Fe and Mn ores in the Bond rodmill in different testsieves The slopes of all lines in the figures are equal to the k value of Eq

This paper investigates grinding of mineral mixtures with different grindabilities in the Bond ball mill Understanding the ore mixture grinding is of great importance in mineral processing The energy required for crushing and grinding is presented by the Bond work index and is determined by means of Bond grindability test This paper presents the experimental results of the Bond work index

correlation between the abrasion valueX2 and work index Wi is found to be Wi 18 Ln X2 115 with correlation coefficient of 080 KEYWORDS Bond work index Mechanical properties of rocks Grinding energy Crushing resistance 1 INTRODUCTION Comminution in a mineral processing plant or mill involves a sequence of crushi ng

Introduction of the Bond work index w i to the above equations Hard ore 180 1961 Medium ore 120 1290 Soft ore 65 0671 Coefficients k Bond work index w i kWhshort ton Denver orehardness Table Relationship between the Bond work index w i and the ore hardness designated by Denver

Bond Work Index FormulaEquation 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 is the work index or the grinding resistance

Grindability by Ames Ore grindabihty refers to the ease with which materials can be comminuted and data from grindability tests are used to evaluate crushing and grinding efficiencyProbably the most widely used parameter to measure ore grindability is the Bond work index W The work index Wi is calculated kWh per ton applied in reducing

LAARMANN321 1500 x 675 x 1200 mm 300 kgs only machine 230V50Hz60Hz Variable 080 rpm 075KW Bond Crushing Work Index CWI The Bond Crushing Work Index CWI describes the competency of the ore at larger particle sizes

Bond Work Index Energy equation Grinding You need a twostage solution first stage opencircuit mill and then second stage closedcircuit mill First stage will be broken into two parts as well you use a Bond rod mill work index for the coarse component of the ore 21 mm and the Bond ball mill work index for the fine component 21 mm

BOND WORK INDEX The Bond Work Index is a factor that measures the energy consumed in size reduction operation of the ore The Bonds Work Index equation is WWI 10P80 10F80 where W the energy input Work input per ton kwhmetric ton WI Work Index specific energy per ton kwhmetric ton characterizes the ore

The ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100 passing 336 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 The work index calculations across a narrow size range are conducted using the appropriate laboratory work index determination for the material size of interest or by chaining individual work index calculations using multiple laboratory work index

The Bond work index is a parameter which represents a measure of an ore resistance to grinding Numerically the work index represents the energy kWhsht required to reduce the material of one short ton from a theoretically infinite feed size to size at which 80 percent of material passes through sieve with square aperture100

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

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