### Bond Work Index Procedure and Method

Cleaning and Storing of Ball Mill Charge after the Bond Work Index Procedure is done: Add about 500 g of silica sand into the mill containing the ball charge. Seal the mill. Rotate for 20 revolutions to clean. Empty the mill charge and sand into the ball try once grinding is complete. Clean out the mill using a brush. Put the lid on the mill.

### Bond Work Index Tests - Grinding 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 test requires a minimum of 10kg of sample that has been stage-crushed to 100% passing size of <3.35 mm. Any screen size below 600µm can be used for the testwork depending on your requirements.

### JKTech Laboratory Services

The standard Bond Ball Mill Work Index test procedure is firstly to stage crush the feed to minus 3.35mm, and size a representative sample. The test then involves a series of batch grinds in a standard Bond mill. A Bond mill is 0.305m by 0.305m, with rounded corners, a smooth lining, and runs at 70rpm.

### Bond Work Index - an overview | ScienceDirect Topics

Ball mill design requires a Bond work index, BWi, for ball mills at the correct passing size; SAG mill design requires an appropriate SAG test, for example, SPI (Chapter 5). Flotation design needs a valid measure of kinetics for each sample, including the maximum attainable recovery and rate constants for each mineral ( Chapter 12 ).

### 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.

### Application of Operating Work Indices in Autogenous ...

Mill operators have long used operating work indices to evaluate grinding circuit efficiency, with great utility. Operating work indices can be used to evaluate individual units in a conventional circuit or the overall performance of an autogenous-semiautogenous (AG-SAG)/ball mill circuit, but they are of limited value in evaluating AG-SAG and ball mill sections separately.

### Comparison of UCS to Bond Work Indices

FIGURE 1: BOND CRUSHING WORK INDEX v. The scatter of the points in Figure 1 indicates no correlation between crushing work index and UCS. There is no generalised relationship between the two parameters over the global data set. FIGURE 2: BOND CRUSHING WORK INDEX v. Figure 2 displays the global data separated by mine.

### Bond Tests | Mining | SGS

The test requires calibration against the standard Bond Ball Mill Work Index test to estimate the Work Index. It is used to show the orebody hardness profile and to predict throughput in a ball mill circuit. SGS created the Modbond grindability test and has a large proprietary database.

### CORRELATION BETWEEN BOND WORK INDEX AND …

Figure 1: Uniaxial compression test machine. 3- STANDARD BOND TESTS. The Bonds standard ball mill is used to determine the work index value of differ ent samples. The Bond work index is defined as the kilowatt-hours per short ton required to break from infinite size to a …

### 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. The SPI(R) value is known not to be an additive parameter, however errors introduced by block kriging are not thought to be significant .

### Testwork: Bond ball mill work index - SAGMILLING.COM

The Bond ball mill work index is one of the most commonly used grindability tests in mining, and is often referred to as the Bond work index. The test is a locked-cycle test where ground product is removed from test cycles and replaced by fresh feed. The test much achieve a steady-state before completion.

### Bond Work Index Tables (Wi) - scribd.com

Here there are given tables from various sources for the Bond work index values of mining materials (ores, industrial minerals and rocks). These work indexes can be used for the determination of tumbling mills (rod, ball mills) power. Thus, the suitable mill dimensions can be effectively determined.

### (PDF) A quick method for bond work index approximate value ...

The Bond work index, Wi, is defined in a Bond ball mill on the samples of standard size − 3.327 + 0 mm.

### USING THE SMC TEST® TO PREDICT COMMINUTION CIRCUIT …

ball work index test, enable the prediction of the specific energy of comminution circuits where such circuits include combinations of any of the following equipment: AG and SAG mills Ball mills