### Wet bond mill testScienceDirect

The step bystep experimental wet procedure to determine the Bond ball mill work index is also described in the Appendix Test material A quartz sample was used for the tests DISCUSSION OF THE RESULTS Several modified procedures might be adopted when a fine closing screen is used The first approach would be screening in stages with

Get Price### Power based modelling of single stage AG and SAG mill

WiBM is the Bond ball mill work index unitless CFnet is an empirical adjustment to a ball mill circuit CFnet = 2.350.29 ln P80 Morrell Mi model Morrell 2008 published a two parameter model based on two equations 3 4 to describe a variety of comminution devices including single stage SAG and AG mills The CEE

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WiBM Bond Ball Mill Test Work Index kWh/t Wic Bond Impact Crushing Test Work Index kWh/t WioACT Actual Operating Bond Work Index determined from measurements on the circuit kWh/t WiRM Bond Rod Mill Test Work Index kWh/t WiSTD Standard Circuit Bond Work Index expected or designed used for circuit design Specific energy requirement at

Get Price### Standard Bond Ball Mill Grindability Test Method Procedure

Standard Bond Ball Mill Grindability Test Method Procedure Here is the old Allis Chalmers Bond Work Index Grindability Test Procedure The standard feed is prepared by stage crushing to all passing a 6 mesh sieve but finer feed can be used when necessary.

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grams per revolution Gbp is the ball mill grindability The ball mill work index Wi kWh/short ton is calculated from the following equation Bond 1961 1 The mill should be cleaned by either blowing air into it or wiping the interior with a cloth and or brush The FC Bond ball mill

Get Price### INTENSIFICATION OF BOND BALL MILL WORK INDEX TEST

INTENSIFICATION OF BOND BALL MILL WORK INDEX TEST THROUGH VARIOUS METHODS V Lvov J Sishchuk L Chitalov Tuesday 12 September 2017 by Libadmin2017 References 17th International Multidisciplinary Scientific GeoConference SGEM 2017 sgem SGEM2017 Conference Proceedings ISBN ISSN 29 June5 July

Get Price### Comparison of UCS to Bond Work Indices

FIGURE 8 ROD MILL/BALL MILL WORK INDEX RATIO v UNCONFINED COMPRESSIVE STRENGTH 100 200 300 400 UCS MPa 0 0.5 1 1.5 2 WiRM/WiBM metric Siddall et al 1996 identified the ratio of Bond rod mill Work Index and ball mill Work Index as being indicative of an ore s compentency Figure 8 plots this ratio versus UCS no trend is apparent

Get Price### Bond Work Index Energy equation Grinding

1 day ago 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 2.1 mm and the Bond ball mill work index for the fine component 2.1 mm It would look like this E prim = 10 Wi rm 2100 0.5F 80 0.5 10 Wi bm T 80 0.52100

Get Price### Why is the Bond Ball Mill Grindability Test done the

The Bond Ball Mill Grindability Test is a locked cycle laboratory grinding test It provides the Bond Ball Mill Work Index which expresses the resistance of a material to ball milling This Index is widely used in the mineral industry for comparing the resistance of different materials to ball milling for estimating the energy required for grinding and for ball mill scale up.

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Bond Ball Mill Work Index is used for determine the grindability of materials and help to choose the suitable grinding equip Position Home Page >>> Products >>> Laboratory Equipments >>> Lab Grinder Bond Ball Mill Work Index.

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Bond Ball Mill 5 October 2015 LAB/PILOT 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

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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 From 1980s the company developed the equipment and

Get Price### Procedure for determination of ball Bond work index in

The 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 ball milling This happens after 7–10 grinding cycles which shows that the procedure is a lengthy and complex one and is therefore susceptible to

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The laboratory procedure for running a Bond ball mill work index test requires that the operator choose a closing screen sieve size The instruction is to choose a sieve size that results in the

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Correlation between the Bond Work Indices calculated from three different method HGI Bond Ball Mill Work Index and Bond Rod Mill Work Index was established Appropriate correlation in the

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Table I shows the Bond ball mill work index obtained for the ore samples as well as the iron and silica content in concentrate and tail after LIMS The concentrate weight recovery was in the order of 50–60 Furthermore it may be observed that the Bond ball mill work indices for the ore Wi varies from 14.6 to 20.9 kWh/t.

Get Price### Bond Work Index TestsGrinding Solutions Ltd

The Bond Ball Mill Work Index BBWi test is carried out in a standardised ball mill with a pre defined 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 stage crushed to 100 passing size of <3.35 mm.

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Correction of Bond Ball Mill Work Index Test for Closing Mesh Sizes It is commonly known that one must run the Bond ball mill work index test such you pick a closing mesh

Get Price### Test Method For Bond Ball Mill Work Index ball Mill

Standard Bond Ball Mill Grindability Test Methodprocedure Here is the old allischalmers bond work index grindability test procedure the standard feed is prepared by stage crushing to all passing a 6 mesh sieve but finer feed can be used when necessary it is screen analyzed and packed by shaking in a 1000cc graduated cylinder and the weight of 700 cc is placed in the mill and ground dry at 250

Get Price### Procedure for determination of ball Bond work index in

The 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

Get Price### A new approach to the calculation of bond work index for

A Bond Work index mill ball charge and closing screen product size distributions for grinding crystalline grains Int J Miner Process 165 2017 pp 814 10.1016/j.minpro.2017.05.011

Get Price### Correction of Bond Ball Mill Work Index Test for Closing

The goal of this work is to create an equation to adjust a Bond ball mill work index from one P 80 basis to another The proposed model consists of two components the variable coefficient that is determined from a specific work index determination and a fixed exponent determined by a

Get Price### A Comparison of Test Procedures for Estimating the

Both procedures were conducted using a standard Bond test mill INTRODUCTION The Bond ball work index is widely used in the field of minerals processing as an indicator of ore grindability The work index is determined by means of a locked cycle test procedure that typically

Get Price### Table of Bond Work Index by Minerals

This Table of Ball Mill Bond Work Index of Minerals is a summary as tested on around the world sample You can find the SG of each mineral samples on the other table.

Get Price### Size Reduction and Energy RequirementScienceDirect

A Bond ball mill work index is then performed on the mill product for the design of SAG ball mill circuits This is important because it was found that there was a 1–1.5 kWh/t higher ball mill work index if the –3.35 mm ball mill test feed size is obtained by SAG mill grinding compared with crushing.

Get Price### COMPARISON OF HPGRBALL MILL AND HPGR

Bond ball mill work index C Wi Bond crusher work index D HPGR roll diameter m E sp net specific energy consumption kWh/t F HPGR hydraulic pressing force kN F 80 particle size at which 80 of particles pass in feed F SP 2HPGR specific pressing force N/mm L HPGR roll length m ṁ or m dot HPGR specific throughput constant ts/hm3

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Bond ball mill work index Figure 2 Ball mill for determining Bond ball mill work index 1 For the purists there were two models in existence at the time the Von Rittinger and Kick models Neither of these gave results that matched the observations of specific energy consumption from tumbling mills.

Get Price### Bond Efficiency GMG ICE v1 r04 Determining

WiBM Bond Ball Mill Test Work Index kWh/t Wic Bond Impact Crushing Test Work Index kWh/t WioACT Actual Operating Bond Work Index determined from measurements on the circuit kWh/t WiRM Bond Rod Mill Test Work Index kWh/t WiSTD Standard Circuit Bond Work Index expected or designed used for circuit design Specific energy requirement at

Get Price### Essa Bond Test Work EquipmentEssa North America

Essa Bond Test Work Equipment Internationally accepted mineral metallurgical standard test procedures to determine the physical properties of ores include the Bond ball mill work index and the Bond rod mill work index These are empirical indices determined by close circuit grindability tests developed by F.C.Bond in the mid 1930 s.

Get Price### The Effect of Circulating Load and Test Sieve Size on The

the Bond ball mill grindability Ght and work index W with natural amorphous silica 2 MATERIAL AND METHOD As a base for this study four natural amorphous silica samples were used for test The chemical properties of samples are presented in Table 1.

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The SAG mill pinion energy W SDT kWh/t and SAG discharge Bond ball mill work index S d BWI kWh/t are then used to calculate the total energy to grind the ore from 80 passing 152 mm to 80 passing the client specified final product size P 80.This information along with the ore specific gravity is used to calculate necessary mill sizes and motor power in industrial applications.

Get Price### Bond Work Index TestsGrinding Solutions Ltd

The Bond Ball Mill Work Index BBWi test is carried out in a standardised ball mill with a pre defined 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 stage crushed to 100 passing size of <3.35 mm.

Get Price### Comminution testingJKTechUniversity of Queensland

A Bond Ball Mill Work Index may also be used in the simulation and optimisation of existing mill s and the associated grinding circuit s 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 3.35 mm as required for the Bond Ball Mill Work Index test feed.

Get Price### Size Reduction and Energy RequirementScienceDirect

A Bond ball mill work index is then performed on the mill product for the design of SAG ball mill circuits This is important because it was found that there was a 1–1.5 kWh/t higher ball mill work index if the –3.35 mm ball mill test feed size is obtained by SAG mill grinding compared with crushing.

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Bond Ball Mill 5 October 2015 LAB/PILOT 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.

Get Price### Procedure for determination of ball Bond work index in

1. IntroductionA Bond Ball Mill Work Index test is a standard test for determining the ball mill work index of a sample of ore It was developed by Fred Bond in 1952 and modified in 1961 JKMRC CO 2006 .This index is widely used in the mineral industry for comparing the resistance of different materials to ball milling for estimating the energy required for grinding and for ball mill

Get Price### GMSG GUIDELINE DETERMINING THE BOND

rod mill Work Index test for these purposes Chose a o closing screen for the ball mill test one standard square root of 2 series mesh size coarser than the plant ball mill circuit P80 If between standard mesh sizes the finer of the chose two Results of Bond ball mill tests conducted with closing

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Bond Ball Mill Work Index is used for determine the grindability of materials and help to choose the suitable grinding equip Position Home Page >>> Products >>> Laboratory Equipments >>> Lab Grinder Bond Ball Mill.

Get Price### Bond Work Indexan overview ScienceDirect Topics

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 kWh/t required to grind to that size Magdalinovic measured the Bond work index of three ore types using different test screen sizes.

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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

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