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

The Bond Index conforming rod charge consists of: 6 rods of 1.25“ diameter and 21“ length. 2 rods of 1.75“ diameter and 21“ length. 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.

More### bond ball mill work index test standard pdf

SIMPLIFIED BOND WORK INDEX DETERMINATION By: R O . the rod mill and the ball mill The simplified test method described in this paper is an alternative procedure to the ball mill grindability test The work index is computed using the following empirical equation revised by Bond in 1960, where the sieve opening at which the test is made, (microns) 358 (2) Gb Bond's standard ball mill ...

More### Comminution testing - JKTech - University of Queensland

2020-7-30 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.

More### Ball Mill Design/Power Calculation - LinkedIn

2016-12-12 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 ...

More### cement ball mill design bond method

Cement ball mill design bond method Manufacturer Of High . Ball mill design calculations bbbrerait basic calculation formulas for cement ball mill 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 density, desired mill tonnage capacity DTPH, operating ...

More### How to Size a Ball Mill -Design Calculator Formula

2015-5-15 The parameter Wi, known as the work index of the ore, is obtained from batch bench tests first devised by Bond (1961). The power calculated on using equation 1, (Bond, 1961; Rowland and Kjos, 1978), relates to: 1) Rod milling – a rod mill with a

More### Application of Box-Behnken design and response surface ...

The Box–Behnken experimental design was used to provide data for modeling and the variables of model were Bond work index, grinding time and ball diameter of mill. Coal grinding tests were performed changing these three variables for three size fractions of coals (−3350 +

More### Operating work index is not the specific energy consumption

2018-10-24 However, Bond Work Indeces are related to the type of equipment to be used (rod mill, ball mill, SAG uses Drop Ball parameter-Kwhr/m3-, so it is more

More### Comparative value of work indices obtained by Bond's ...

Download Table Comparative value of work indices obtained by Bond's procedure and Simulation from publication: Review on Simulation of Work Index Determination The Bond grindability test ...

More### THE EFFECT OF BALL MILL OPERATING PARAMETERS ON

2021-1-6 Later work done by Hukki (1975) attempted to show the validity of each theory within a certain particle size range. This study illustrated that Kicks law was applicable in the crushing range (above 1 cm in diameter) . Bond's theory was more suited to the particle size ranges involved in conventional ball and rod mill grinding (5 to 250 mm).

More### SMC Test® Minerals Processing Comminution Testing -

2021-11-15 SMC Data Processing. The results from conducting the SMC Test® are used to determine the drop-weight index (DWi) which is a measure of the strength of the rock as well as the comminution indices Mia, Mih and Mic. In conjunction with the Bond ball mill work index they can be used to accurately predict the overall specific energy requirements of ...

More### A Method of C alculating Autogenous/ Semi

2018-2-20 rod mill work index has not been de ned as yet. The ball ﬁ mill work index is con rmed at 16 kWh/t. The operating ﬁ work index, though, is in the range of 21 kWh/t to 25 kWh/t showing high inefﬁ ciency. This raises the point that, in some cases, the Bond EF4 oversize factor calculation is not suf cient to compensate ﬁ

More### bond ball mill work index test standard pdf

SIMPLIFIED BOND WORK INDEX DETERMINATION By: R O . the rod mill and the ball mill The simplified test method described in this paper is an alternative procedure to the ball mill grindability test The work index is computed using the following empirical equation revised by Bond in 1960, where the sieve opening at which the test is made, (microns) 358 (2) Gb Bond's standard ball mill ...

More### Application of Box-Behnken design and response surface ...

The Box–Behnken experimental design was used to provide data for modeling and the variables of model were Bond work index, grinding time and ball diameter of mill. Coal grinding tests were performed changing these three variables for three size fractions of coals (−3350 +

More### THE EFFECT OF BALL MILL OPERATING PARAMETERS ON

2021-1-6 Later work done by Hukki (1975) attempted to show the validity of each theory within a certain particle size range. This study illustrated that Kicks law was applicable in the crushing range (above 1 cm in diameter) . Bond's theory was more suited to the particle size ranges involved in conventional ball and rod mill grinding (5 to 250 mm).

More### cement ball mill design bond method

cement ball mill design bond method seriouslaserde. cement ball mill design bond method The test then involves a series of batch grinds in a standard Bond mill A Bond mill is 0305m by 0305m, with rounded corners, a smooth lining, and runs at 70rpm A quick method for bond work index approximate value The Bond ball mill grindability test is run in a laboratory until a circulating load of 250

More### 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 ...

More### Metcom Training - metcomtech

4. Work Index Efficiency To determine the Work Index calculations for evaluating grinding circuit efficiency, as initially developed by Mr. Fred Bond. $199: none: 3.50: 5. Functional Performance of Ball Milling To determine ball mill circuit performance in terms of the elements of the functional performance equation. $199: none: 2.50: 6.

More### bond ball mill work index online application

Ball mill design requires a Bond work index, BWi, for ball mills at the correct passing size; S mill design requires an appropriate S 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

More### Energy Use of Fine Grinding in Mineral Processing ...

2013-12-18 For P80s finer than 75 μm, the Levin test, a modified Bond ball mill work index test, may be used to predict grinding performance. Signature Plots. No general work index formula governing energy use over a range of conditions, like the Bond

More### Comminution Consultants, Grinding Circuit Design - DJB ...

Definition of Specific Energy Requirements and Efficient Design of a Grinding Circuit (Simulation of Mill Sizing and Prediction of Mill Feed Rates by DJB’s “Millpower2000” Bond Work Index-based Methodology, Matching the Mill Drive to the Mill for Effective Operating Capability to the Desired Operating Criteria, Comparison with the Results ...

More### CONTRIBUTION TO DETERMINATION OF COAL

2008-10-30 results of tests by Bond. For the calculation of work index Wi from HGI values Bond (1954) proposed by the following formula: 88 . W. i = ———— HGI. 0,5 . In 1961 Bond specifies for W. i. calculation the following modified formula: 435 . Wi = ———— HGI0,91 . On the basis of research of grindability McIntyre and Plitt, 1980 ...

More### bond ball mill work index database jktech

bond ball mill work index database jktech. bond ball mill work index database jktech Jul 30 2020 A Bond Ball Mill Work Index may also be used in the simulation and optimisation of existing mills and the associated grinding circuits 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 335 mm as required for ...

More### Advances in Discrete Element Method Application to ...

2014-8-15 Grinding mill modeling has attracted the attention of a number of researchers ever since Bond published his method of energy calculation with an index called Bond work index (Bond 1961). In the 1970s, the population balance or selection and breakage function model was at the forefront of research (Fuerstenau et al. 1973).

More### bond ball mill work index test standard pdf

SIMPLIFIED BOND WORK INDEX DETERMINATION By: R O . the rod mill and the ball mill The simplified test method described in this paper is an alternative procedure to the ball mill grindability test The work index is computed using the following empirical equation revised by Bond in 1960, where the sieve opening at which the test is made, (microns) 358 (2) Gb Bond's standard ball mill ...

More### 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 ...

More### cement ball mill design bond method

Cement ball mill design bond method Manufacturer Of High . Ball mill design calculations bbbrerait basic calculation formulas for cement ball mill 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 density, desired mill tonnage capacity DTPH, operating ...

More### bond ball mill work index database jktech

bond ball mill work index database jktech. bond ball mill work index database jktech Jul 30 2020 A Bond Ball Mill Work Index may also be used in the simulation and optimisation of existing mills and the associated grinding circuits 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 335 mm as required for ...

More### bond ball mill work index online application

Ball mill design requires a Bond work index, BWi, for ball mills at the correct passing size; S mill design requires an appropriate S 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

More### Advances in Discrete Element Method Application to ...

2014-8-15 Grinding mill modeling has attracted the attention of a number of researchers ever since Bond published his method of energy calculation with an index called Bond work index (Bond 1961). In the 1970s, the population balance or selection and breakage function model was at the forefront of research (Fuerstenau et al. 1973).

More### Energy Use of Fine Grinding in Mineral Processing ...

2013-12-18 For P80s finer than 75 μm, the Levin test, a modified Bond ball mill work index test, may be used to predict grinding performance. Signature Plots. No general work index formula governing energy use over a range of conditions, like the Bond

More### Starkey Associates Inc. - Leaders in Comminution Design

SAGDesign testing provides SAG pinion energy grindability in kWh/t to within +/- 5% from 152 to 1.7 mm, and Bond Ball Mill Work Index on SAG ground ore, from the SAG test on the same sample. Starkey Associates uses the patented SAGDesign technology to calculate accurate mill sizes from measurements on a client’s own ore samples.

More### Ball Mill Used in Minerals Processing Plant Prominer ...

This ball mill is typically designed to grind mineral ores and other materials with different hardness, and it is widely used in different fields, such as ore dressing, building material field, chemical industry, etc. Due to the difference of its slurry discharging method, it is divided to

More### CONTRIBUTION TO DETERMINATION OF COAL

2008-10-30 results of tests by Bond. For the calculation of work index Wi from HGI values Bond (1954) proposed by the following formula: 88 . W. i = ———— HGI. 0,5 . In 1961 Bond specifies for W. i. calculation the following modified formula: 435 . Wi = ———— HGI0,91 . On the basis of research of grindability McIntyre and Plitt, 1980 ...

More### SciELO - Brasil - Comminution circuits for compact ...

1 - Bench scale test: 1.1 - Bond Work Index: Determination of Ball Mill Work Index using Bond methodology (BOND 1964 BOND, F.C. Lab equipment and tests help predict metal consumption in crushing and grinding units.Engineering Mining Journal, New York, v.165, n.6, p.169-176, 1964.

More### GUJARAT TECHNOLOGICAL UNIVERSITY

2020-9-11 To find mixing index. 5. To determine Critical index, Work Index, Bond’s Law, Rittinger’s Law and Kick’s Law for Ball mill. 6. To determine the scr een efficiency for the given sample. 7. To determine Rittinger’s constant, Bond’s constant, Kick’s constant and Work Index. To determine nip angle, Reduction Ratio, Ribbon Factor, 8.

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