### JKTech Laboratory ServicesJKTech JKTech

JKTech Laboratory Services Bond Ball Mill Index Test (BRMWI) A Bond Ball Mill Index Test (BBMWI) is a standard test for determining the Ball Mill Work Index of a sample of ore. The BBMWI is a measure of the resistance of the material to crushing and grinding. It can be used to determine

Get Price### MINE 331Bond Work Indexii MINE 331 Bond Work Index

1 Introduction Finding the bond work index of an ore type is crucial to determining the grinding energy required during comminution in a ball mill. The bond work index is a constant characteristic related to the hardness of a specific ore type. Bond work index is one of three different approaches that can be used to calculate the work index of an ore.

Get Price### Bond Work Index Formula-Equation

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

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### Investigation into the applicability of Bond Work Index

Bond Work Index (BWI) Hardgrove Grindability Index (HGI) tests for biomass coal. BWI can predict the potential for mill choking of biomass in a tube and ball mill. HGI is a poor method of predicting grindability of biomass in vertical spindle mills

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

In this study the effect of circulating load (CL) and test sieve size (P ) which are inaccuracies of Bond grindability on the Bond ball mill grindability (G hg) and work index (W ) are

Get Price### Insmart Bonds Work Index Ball MillYouTube

Aug 30 2017 · Insmart Bond s Work Index Ball Mill. Category People Blogs Show more Show less. Comments are turned off Autoplay When autoplay is enabled a suggested video will automatically play next.

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

This is because work index frequently changes as a function of the product size in comminution. If target grind size during a project is changed or if the test is run at the wrong product size then it is necessarily to provide a correction. The goal of this work is to create an equation to adjust a Bond ball mill work index from one P 80 basis

Get Price### QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE

The aim of this study was to develop a new method for assessing the Bond work index in a ball mill (BBWI) which is based on a first order kinetics present in the Bond ball mill for grinding mineral raw materials (Austin et al. 1981 Ahmadi and Shahsavari 2009). Theoretical basis of quick procedure

Get Price### Bond Work Index Procedure and Method

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 <1/2″ 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.

Get Price### Ball Mill Design/Power CalculationLinkedIn

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

Get Price### Bond Ball Mill Work Index DeterminationFTMLIE Heavy

We have bond ball mill work index determination The average useful work input to the standard ball mill is 65 joulesRev with 115 joulesRev to the rod mill The crack energy Ce of the sample tested is found by dividing joulesRev by CmRev The standard work index

Get Price### A New Approach to the Calculation of Work Index and the

A New Approach to the Calculation of Work Index and the Potential Energy of a Particulate Material factors have been adapted by Bond 5 . The present work is an effort to show that the devia- tion of the . W. i. a laboratory ball mill a labora-

Get Price### Bond s Work Index Ball Millsinsmart systems

Insmart Bond s Ball-Mill 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

Get Price### Bond Ball Mill Index Test JKTech

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### ball mill bond work index for limestone

Laporan Akhir Projek Penyelidikan Jangka Pendek Study of the The clinker samples collected also undergone standard Bond grindability test. The objective of the Bond ball mill test is to determine the so-called standard work index .. carbonate found in

Get Price### Operating work index is not the specific energy consumption

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

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

This is because work index frequently changes as a function of the product size in comminution. If target grind size during a project is changed or if the test is run at the wrong product size then it is necessarily to provide a correction. The goal of this work is to create an equation to adjust a Bond ball mill work index from one P 80 basis

Get Price### Correlations for the Grindability of the Ball Mill As a

In designing and optimizing a milling circuit using Bond Ball Mill Work Index 7 the following equations are used (Bond 1961). 80 80 1 1 10 P F W W i And P T W (5) Based on this equation it is possible to

Get Price### Testwork SAG grindability indexSAGMILLING

It is a power-based model that predicts E sag using the SAG grindability index (should be compatible with SPI™) and predicts E ball using the Bond ball mill work index with a manual calibration factor CF ball to account for effects like the phantom cyclone.

Get Price### GMSG GUIDELINE DETERMINING THE BOND EFFICIENCY OF

Bond Test WI s (kWh/t) Rod Mill Ball Mill 9.5 kWh/t.8 9 kWh/t . Bond Standard Circuit Work Index Assume the rod mill Work Index of 9.5 applies from the actual rod mill feed sizeof 19 300 mµ (although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16 000 m) to a rod µ

Get Price### A New Approach to the Calculation of Work Index and the

A New Approach to the Calculation of Work Index and the Potential Energy of a Particulate Material factors have been adapted by Bond 5 . The present work is an effort to show that the devia- tion of the . W. i. a laboratory ball mill a labora-

Get Price### Testwork SAG grindability indexSAGMILLING

It is a power-based model that predicts E sag using the SAG grindability index (should be compatible with SPI™) and predicts E ball using the Bond ball mill work index with a manual calibration factor CF ball

Get Price### COMMINUTION 10SAGDesign

from 1.4 to 34 kWh/t and Bond ball mill work index values vary from 6 to 24 kW/t for the same ores. Project design tonnages varied from 200 to 150 000 t/d SAG mill sizes varied from 10 ft to 40 ft diameter in multiple SAG mills and ball mill

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

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### Bond Tests Mining SGS

Bond F. C. "Crushing Tests by Pressure and Impact" Trans AIME Vol 169 1947 pp 58-66. Bond Rod Mill Grindability Test. The test determines the Bond Rod Mill Work Index which is used with Bond s Third Theory of Comminution to calculate net power requirements when sizing ball mills . Various correction factors may have to be applied.

Get Price### Morrell Method-GMG-ICE-v01-r01 Morrell method

and the Bond Ball Mill Test Work Index (WiBM GMG 2016a) and the Morrell equations and their application (see Annex B). A worked example is provided in Annex C. 5. SCOPE The Morrell method can be used to predict the specific energy of comminution circuits where such circuits include

Get Price### Application of Operating Work Indices in Autogenous

Ball Mill Wio BWio 8.6 Circuit Wio OWio 14.6 Bond Ball Mill Work Index BWi kWh/t 13.4 Bond Rod Mill Work Index RWi kWh/t 18.1 Table 1. Example of AG/SAG 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

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