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### Bond Work Index Procedure and Method - 911

2015-6-6 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

More### 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 ).

More### Table of Bond Work Index by Minerals - 911 Metallurgist

2015-6-19 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. Show. 10 25 50 100. entries. Source 1. Source 2. Source 3. Source 3.

More### Bond Work Index Report Matrix House - 911 Metallurgist

2017-1-7 Work index of 14.6 kWh/t, from the Bond Ball Mill is indicative of a hard ore. The hardness indexes are defined as follows: Property Soft Medium Hard Very Hard Bond WI (kWh/t) 7 - 9 9 - 14 14 -

More### Investigation into the applicability of Bond Work Index ...

2015-10-15 The Bond Work Index (BWI or Wi) is defined as the calculated specific energy (kW h/t) applied in reducing material of infinite particle size to 80% passing 100 μm. The higher the value for Wi, the more energy is required to grind a material in a ball mill,.

More### QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE

2016-12-27 According to the Bond standard procedure, the work index is determined by simulating a dry grinding in a closed circuit in the Bond ball mill to achieve

More### 20150505 Bond Efficiency-GMG-ICE-v1-r04 Determining

2020-9-24 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 the drive pinions. 3.KEYWORDS Work Index, Work Index Efficiency, Bond Work Index

More### SMC Test® Minerals Processing Comminution Testing

2 天前 In conjunction with the Bond ball mill work index they can be used to accurately predict the overall specific energy requirements of circuits containing: AG and SAG mills, Ball mills, Rod mills, Crushers, High Pressure Grinding Rolls (HPGR).

More### Procedure for determination of ball Bond work index

2009-1-1 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 ...

More### SIMPLIFIED BOND WORK INDEX DETERMINATION By: R.

2015-8-6 The work index of a particular material is determined in the laboratory by conducting the standard Bond grindability test. Bond developed separate tests for 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.

More### Determination Of The Bond Work Index Using An

Numerically, the work index is the energy required in kwh/t to reduce a given material from theoretically infinite feed size to 80% passing 100 microns. The work index of a particular material is determined in the laboratory by conducting the standard Bond grindability test. Bond developed separate tests for the rod mill and the ball mill.

More### Investigation into the applicability of Bond Work Index ...

2015-10-15 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. • Pellets should be composed of pre-densified particles close to the target size. •

More### A new approach to the calculation of bond work index

2021-5-1 A Bond Work index mill ball charge and closing screen product size distributions for grinding crystalline grains Int. J. Miner. Process. , 165 ( 2017 ) , pp. 8 - 14 , 10.1016/j.minpro.2017.05.011

More### QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE

2016-12-27 micrometers in size. According to the Bond standard procedure, the work index is determined by simulating a dry grinding in a closed circuit in the Bond ball mill to achieve 250% circulating load (Bond, 1949, 1952, 1961). The test is performed on a raw material approximately weighing 10 kg, which coarseness is 100% -3.327 mm.

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

2013-12-24 The work index . W. i. was defined by F. Bond as the specific energy (kWh/ton) required to reduce a particulate ... Ball Mill Batch Process The mill dimensions, (D × L), are 0.204 × 0.158 m and it is loaded with 6.5 kg steel balls between 25 and 32 mm in diameter. The 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### 20150505 Bond Efficiency-GMG-ICE-v1-r04 Determining

2020-9-24 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 ...

More### 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 ...

More### Procedure for determination of ball Bond work index

2009-1-1 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 ...

More### Procedure for determination of ball Bond work index

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 ...

More### INTENSIFICATION OF BOND BALL MILL WORK INDEX

2017-9-12 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.org, SGEM2017 Conference Proceedings, ISBN 978-619-7105-98-8 / ISSN 1314-2704, 29 June - 5 July ...

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

2013-12-24 The work index . W. i. was defined by F. Bond as the specific energy (kWh/ton) required to reduce a particulate ... Ball Mill Batch Process The mill dimensions, (D × L), are 0.204 × 0.158 m and it is loaded with 6.5 kg steel balls between 25 and 32 mm in diameter. The mill

More### A new approach to the calculation of bond work index

2021-5-1 A Bond Work index mill ball charge and closing screen product size distributions for grinding crystalline grains Int. J. Miner. Process. , 165 ( 2017 ) , pp. 8 - 14 , 10.1016/j.minpro.2017.05.011

More### THE BOND WORK INDEX OF LIMESTONE AND ANDESITE

2018-4-6 THE BOND WORK INDEX OF LIMESTONE AND ANDESITE MIXTURES** Abstract This paper investigates grinding of mineral mixtures with different grindabilities in the Bond ball mill. Understanding the ore mixture grinding is of great importance in mineral processing. The energy

More### C O N S U L T I N G L T D TECHNICAL MEMORANDUM

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.

More### GMSG GUIDELINE: DETERMINING THE BOND EFFICIENCY

2018-2-20 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

More### SMC Test® Minerals Processing Comminution Testing

2 天前 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### USING THE SMC TEST® TO PREDICT COMMINUTION

2020-3-24 work index covering grinding of fine particles is labelled M. ib (Morrell, 2008). M. ia. values are provided as a standard output from a SMC Test ® (Morrell, 2004. a) whilst M. ib. values can be determined using the data generated by a conventional Bond ball mill work index test (M. ib. is NOT the Bond ball work index). M. ic. and M. ih ...

More### Bond Work Index Ball Mill - studioverve

The Bond Work Index - So Crucial To Comminution Planning. the bond work index approach is the standard method of selecting ball mills to grind from about 3 mm to 25 µm provided that correction factors are used if necessary. the power prediction is fairly accurate for devices that produce a product with a size distribution parallel to that of the feed.,jk bond ball mill test,jk bond ball mill ...

More### Procedure for determination of ball Bond work index

2009-1-1 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 ...

More### work bond index for ball mill - Bussa Machinery

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

More### Procedure for determination of ball Bond work index

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 ...

More### INTENSIFICATION OF BOND BALL MILL WORK INDEX

2017-9-12 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.org, SGEM2017 Conference Proceedings, ISBN 978-619-7105-98-8 / ISSN 1314-2704, 29 June - 5 July ...

More### ball mill bond work index - medica-volla.pl

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.

More### CORRELATION BETWEEN BOND WORK INDEX AND

2014-6-27 The Bond's 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 product size of 80% passing 100 µm. If the breakage

More### JK Bond Ball Mill Test - University of Queensland

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,

More### Predicting Mill Feed Specific Energy from Bond Ball Mill ...

2021-6-19 1 Predicting Mill Feed Specific Energy from Bond Ball Mill Work Index Tests at Olympic Dam Y Li1, V Liebezeit2, K Ehrig3, M Smith4, B Pewkliang5 and E Macmillan6 1. MAusIMM, Senior Geometallurgist, BHP Olympic Dam, Adelaide, South Australia 5000.

More### C O N S U L T I N G L T D TECHNICAL MEMORANDUM

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.

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