### 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.

### 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.

### JKTech Laboratory Services

For every Bond Ball 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. Frequently Asked Questions - Bond Ball Mill Work Index

### (PDF) A quick method for bond work index …

A quick method for the Bond work index approximate value determination, ... due to the difficulties of the standard Bond Ball test. ... It provides the Bond Ball Mill Work Index which expresses ...

### QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE VALUE ...

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

### Bond Ball Mill Work Index (Grindability Tests) - …

19-5-2013 · Bond Ball Mill Work Index (Grindability Tests ... Ductility Test of Bitumen ... 12:31. JIUJITSU2000 Recommended for you. 12:31. Rebuilding older machines using the hand scraping method ...

### Procedure for determination of ball Bond work …

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.

### Bond Index Ball Mill / Rod Mill BT 100 XL - RETSCH

The grinding jar for the Bond Index Rod Mill is 12″ x 24″ in size and has a wave-shaped design. At least 15 to 20 kg sample material is required to simulate a closed grinding circuit in a ball or rod mill. The Rod Mill Work Index (RWI) is used for particle size determination in a size range from 25 mm down to 2.1 mm whereas Ball Mill Work ...

### Procedure for determination of ball Bond work …

The work index (Wi) is calculated in a laboratory-scale ball mill with Bond equation. The Bond work index has been widely used in designing full-scale mills but the Bond test is rather complex, lengthy susceptible to procedural errors and this is why attempts have been made to abbreviate and simplify Bond test procedure (Weiss, 1985). 2.

### Geometallurgy - Wikipedia

The Bond ball mill work index test is thought to be additive because of its units of energy; nevertheless, experimental blending results show a non-additive behavior. [18] The SPI(R) value is known not to be an additive parameter, however errors introduced by block kriging are not thought to be significant .

### Bond Tests | Mining | SGS

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. The test is a closed-circuit dry grindability test performed in a standard rod mill.

### SIMULATING THE BOND ROD MILL GRINDABILITY …

The Bond rod mill grindability test is a widely used tool to estimate the response of ores to rod milling. However, the mass of ore required to conduct the test, which can typically vary from ...

### procedure for wet ball mill test - ijsclubnibbixwoud.nl

The work index (Wi) is calculated in a laboratory scale ball mill with Bond equation The Bond work index has been widely used in designing full scale mills but the Bond test is rather complex lengthy susceptible to procedural errors and this is why attempts have been made to abbreviate and simplify Bond test procedure (Weiss 1985) 2 [Chat Online]

### Simulation studies on Energy Requirement, Work Input and ...

grindability is Bond’s work index which is defined as the resistance of the material to grinding. The standard equation used by them for the ball mill work index (Bond work index) is as follows. 230. 82 1 10 / 80 > 10 / 80 @ 44.5 1. P G P F W i bg i u (4) In designing and optimizing a milling circuit using Bond

### Orway Mineral Consultants Canada Ltd. Mississauga, ON ...

in a closed circuit dry grinding environment. The ground product for the laboratory SAG mill is then submitted to the Bond ball mill work index test. The number of SAG mill revolutions required to grind the material to a P 80 of 1.7 mm is used to predict AG/SAG specific energy using quation 4. Correction E

### sag mill and ratio of bond ball and rod work index

Testwork Bond ball mill work index SAGMILLINGCOM. the final product size The prediction of the SAG mill transfer size used in the formula is made by comparison with pilotplant data and operating plant data for similar ore types (Barratt 1989) The approach acknowledges grinding efficiency as the ratio of operating work index to that for a single stage ball mill

### A New Approach to the Calculation of Work Index and the ...

The work index . W. i. was defined by F. Bond as the specific energy ... using a novel ring mill, a laboratory ball mill, a labora- tory rod mill and the semi continuous process using the ... tests which is similar to the Bond test but with the exist- ing mill of known power.

### bond ball mill work index for pure quartz

Bond Ball Mill Index Test | JKTech. The Bond Ball Mill Work Index is a measure of the resistance of the material to grinding in a ball mill. It can be used to determine the grinding power required for a given throughput of material under ball mill grinding conditions. Get Price

### Testing method for ball mills - Outokumpu …

3-4-2007 · In the second step of the testing method, the test is based on the Bond ball mill. The product from the first step is then used for determination of the required ball mill energy for the secondary grinding stage to reach the target grinding size. The empirical formula to calculate Bond Mill Work Index (BWi) is presented in the equation (2)