Comparison of UCS to Bond Work Indices
C) for coarse rocks (75-50 mm), a rod mill work index (Wi RM) for intermediate sized particles (25-3 mm), and a ball mill work index (Wi BM) for small particles (<3 mm) (Ammtec, 2000). Laboratory testwork is required to determine these Work Indices, and each test requires carefully collected samples of rock that is representative of future mill ...
Correlation of crushing work index and drop …
Ore hardness can be estimated using commercially available standard techniques such as the SAG Power Index (SPI), Bond Work Index (BWI), and JK Drop Weight (JKDW) tests (Bailey et al., 2009 ...
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Comparison of UCS to Bond Work Indices
Unconfined Compressive Strength (UCS) is a commonly used rockmass strength measurement used by rock mechanics practitioners. This paper examines potential relationships between …
Levin Grindability Index Test Method & Procedure
Grindability Index Test Method & Procedure. IsaMills. The Levin test appears to be underused for sizing regrind ball mills. Examples of the results are shown in Table 6. The requirement of 20-30 kg may be a prohibitive factor. …
Effect of core diameter on the Bond impact crushing …
The Bond low energy impact (crushing) work index test is specified to be performed on rock specimens between 50 mm and 75 mm in effective diameter. NQ-diameter drill core, frequently …
1 Comparison of measures of rock crushability
work index and fragmentation results from drop weight tests, as well as a traditional technical measures used in the aggregate industry, the Los Angeles abrasion index.
SAG mills selection methods. III. The F. Bond index …
The crushing work index (CWi) is an indicator characterizing the energy amount (kW * h / t) needed to destroy single pieces of material with a relatively large size range (-75 + 50mm). The impact on such material …
Bond Impact Crushing Work Index -Procedure
The test determines the Bond Impact Work Index which is used with Bond's Third Theory of Comminution to calculate net power requirements when sizing crushers*. It is also used to determine the required open-side …
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USING THE SMC TEST® TO PREDICT COMMINUTION …
the crusher is in open circuit, eg pebble crusher in a AG/SAG circuit, K. 2. takes the value of 1.19. x. 1 = P. 80. in microns of the circuit feed . x. 2 = P. 80. in microns of the circuit product . M. ic = Crushing ore work index and is provided directly by SMC Test ® The coarse ore hardness parameter (S) makes allowance for the decrease in ...
Bond Work Index Tests
The Bond Low-Energy Impact test can be used to determine the Crusher Work index (CWi), also known as the Impact Work Index. The test determines the impact energy at which a specimen …
(PDF) Impact work index prediction from …
The present work shows the application of a model that combines measurements of particle fracture energies and a parameter that characterizes material amenability to breakage by repeated impacts in...
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BOND IMPACT CRUSHING WORK INDEX TESTER
The Pendulum Tester / Bond Impact Crushing Work Index Tester. Working principle Crushing by impact. 76 mm maximum feed size. Test repetition: At …
Bond Work Index Tests
Bond Low Energy Impact Test. The Bond Low-Energy Impact test can be used to determine the Crusher Work index (CWi), also known as the Impact Work Index. The test determines the impact energy at which a specimen fails and allows approximation of …
Comparison of measures of rock crushability
The present work demonstrates that the outcomes of three of these tests, namely the Bond crushability index, the JK Drop Weight Test and the Los Angeles abrasion test, can be predicted from ...
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Testwork: Bond crushing work index
Similar to the ball mill work index, the rod mill work index is a tumbling test that includes both attrition and abrasion breakage mechanisms. Unlike the ball mill work index, the size of the feed to a rod mill test (10 mm–12 …