### CORRELATION BETWEEN BOND WORK INDEX AND

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 characteristics of a material remain constant over all size ranges, the calcul ated work index would be expected to remain constant since

Get Price### CORRELATION BETWEEN BOND WORK INDEX AND

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 characteristics of a material remain constant over all size ranges, the calcul ated work index would be expected to remain constant since

Get Price### ASTM International - Standards Products

Standards Products. Browse ASTM standards, adjuncts, collections and purchasing options. More than 12,000+ ASTM standards are used worldwide to improve product quality, enhance safety and facilitate trade. You can purchase individual standards; a volume that groups like standards together; a section that's comprised of several volumes covering an industry segment; or the entire collection

Get Price### Standard Bond Ball Mill Grindability Test

Here is the old Allis-Chalmers Bond Work Index Grindability Test Procedure. The standard feed is prepared by stage crushing to all passing a 6 mesh sieve, but finer feed can be used when necessary. It is screen analyzed and packed by shaking in a 1000-cc graduated cylinder, and the weight of 700 cc is placed in the mill and ground dry at 250 per cent circulating load. The mill is 12 in. x 12

Get Price### Bond Tests | Mining | SGS

Similar to a Comparative Work Index, this test is an open circuit dry batch grindability test run in the standard Bond Ball Mill for a set time. It can be used at mesh sizes from 65 to 200 mesh (normally 100 mesh). 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

Get Price### Reproducibility Of Bond Work Index With

This is accomplished by the standardization of mill dimensions, tumbling speed, grinding ball charge weight and distribution, sample ore charge weight in the mill and operating practice. The results of this investigation reveal that the Bond work index grindability values may differ substantially with different standard Bond ball mills. This paper will review the results.

Get Price### 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 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 passing size of <3.35 mm. Any screen size below 600µm can be used for the testwork

Get Price### Bond Work Index Formula-Equation

Metallurgical ContentBasic EquationsSize Distribution and Exposure RatioEquations for Work Index VariationsWork Index and Crack Energy What is the Bond Work Index Formula-Equation? In case you had forgotten, here is a classic: You can read all the details of this now "Biblical" grinding power requirement calculation formula in Fred Bond's original paper. You can also review the step-by

Get Price### Bond Abrasion Index Tester - 911Metallurgist

The index can be used to calculate metal wear rates in crushers and ball consumption rates in ball mills. Category: Comminution Testing Equipment in Mineral Processing. Description Description Bond's Abrasion Test AKA Allis Chalmers Abrasion Test . Bond's abrasion test consists of a hardened Cr-Ni-Mo alloy steel paddle (hardness 500 Brinell). 7.62 cm X 2.54 cm X 0.64 cm with 2.54 cm of its

Get Price### Grindability - an overview | ScienceDirect Topics

As the HGI ball mill works on the same principle as pulverizing mills, the index obtained from this could give a fair assessment of the grinding capability of torrefied biomass. For biomass, one should use ( Agus and Waters, 1971; Joshi, 1979 Agus and Waters, 1971 Joshi, 1979 ) a standard volume of sample instead of mass to compare the grinding ease to coal and torrefied biomass.

Get Price### FALEX Four-Ball Extreme Pressure Test Machine

The Load-Wear Index (LWI) quantifies the wear protection at increasing loads. The Last Non-Seizure Load (LNSL) indicates the transition from elastohydrodynamic to boundary lubrication and metal to metal contact. The Falex Four-Ball EP is available in two configurations: Standard System, suitable for the ASTM and IP Standard Test Methods for Four Ball EP Testing High Performance System with

Get Price### List of ASTM International standards - Wikipedia

ASTM A377: Standard Index of Specifications for Ductile-Iron Pressure Pipe: ASTM A380/A380M: Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems : ASTM A381: Standard Specification for Metal-Arc-Welded Steel Pipe for Use With High-Pressure Transmission Systems: ASTM A384/A384M: Standard Practice for Safeguarding Against

Get Price### Bond Rod Mill Work Index Equipment &

Commentary on the apparatus of the Bond rod mill Work Index by Alex Doll December, 2015 [email protected] The Bond "Third Theory" of comminution was originally divided into three size classes reflecting the varieties of comminution equipment common during the time period when Bond (and his collaborators) were gathering the information to calibrate comminution models. The middle

Get Price### astm ball mill work index standard

A bond ball mill work index test is a standard test for determining the ball mill work index of a sample of oret was developed by fred bond in 1952 and modified in 1961 jkmrc co2006 this index is widely used in the mineral industry for comparing the resistance of different materials to ball milling

Get Price### Bond Tests | Mining | SGS

Similar to a Comparative Work Index, this test is an open circuit dry batch grindability test run in the standard Bond Ball Mill for a set time. It can be used at mesh sizes from 65 to 200 mesh (normally 100 mesh). 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

Get Price### Procedure for determination of ball Bond work

01.01.2009· In the determination of ball mill work index 15 kg of representative ore at + 3.35 mm is crushed to − 3.35 mm (Amtech, 2006). The first grinding test is started with an arbitrarily chosen number of mill revolutions. At the end of each grinding cycle, the entire product is discharged from the mill and is screened on a test sieve.

Get Price### Astm Ball Mill Standards - Henan Mining

astm ball mill work index standard – ironbeneficiation this test is an open circuit dry batch grindability test run in the standard Bond Ball Mill for a standard specifiSBMion sheet for ball mill ASTM E18 - 05 Standard Test Methods for Rockwell Hardness and

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. If you

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

closing screen for the ball mill test one (standard square root of 2 series) mesh size coarser than the plant ball mill circuit P80. If between standard mesh sizes, the finer of the chose two. Results of Bond ball mill tests conducted with closing screens of 75 µm or finer are to be treated with caution. The Bond Work Index relationship has been noted to apply down to approximately 70 m, and

Get Price### QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE VALUE

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 -3.327 mm. The first grinding test is performed on a 700 cm3 volume sample with an arbitrary number

Get Price### 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 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 passing size of <3.35 mm. Any screen size below 600µm can be used for the testwork

Get Price### Bond Ball Mill Work Index (Grindability Tests) -

19.05.2013· This video was put together by Joshua Wright and Aldo Vasquerizo as a supplemental lecture for University of Nevada Reno. If you have any questions, need adv

Get Price### Rod Mill - an overview | ScienceDirect Topics

Standard conditions for determining the work index of rod mills under laboratory conditions are: mill size = 305 mm (internal diameter) × 610 mm (internal length) with wave type lining . material dry mineral. size − reduced to < 13,200 μm. quantity − 1250 cm 3 (tapped down to give a reproducible bulk density) mill charge-steel rods − 6 × 38.1 mm dia × 0.53 m long steel rods plus

Get Price### Bond Work Index - an overview | ScienceDirect

The ball mill work index laboratory test is conducted by grinding an ore sample prepared to passing 3.36 mm (6 mesh) to product size in the range of 45-150 µm (325-100 mesh), thus determining the ball mill work index (WiB or BWi).

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

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 Index (BWI) is used for the range from 2.1 mm down to 100 µm. Adjustment of grinding parameters:

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