1 Comparison of measures of rock crushability
However, more recent measures, namely the point load index (or the particle strength), the A*b breakage index and the particle fracture energy, among others, are being increasingly used as...
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OneMine | THAT'S A BIG NUMBER
The properties looked at were Impact Crushing Work Index, Abrasion Index, Bond Rod Mill Work Index and Bond Ball Mill Work Index. A number of testing laboratories …
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Using the Bond work index to measure operating comminution …
Rowland, C.A., 1973, "Comparison of work indices calculated from operating data with those from laboratory test data," Proceedings Tenth International Minerals Processing Congress, The Institution of Mining and Metallurgy, London, UK, pp. 47–61. Google Scholar
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Benchmarking: Bond
The Bond (impact) crushing work index is given as 27.7 based on a laboratory determination. Use the circuit survey data to compare the operating work index to this laboratory determination. The reported power draws of these MP 1000 …
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A Statistical Comparison of Bond Ball Mill Grindability Work Index …
The commonly used grindability tests included in the database are the Bond work indices for ball milling, rod milling and crushing; the drop weight test results A, b, A×b, DWi, Mia, Mic, Mih and ...
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A public Database of tumbling mill grindability …
• WiC Max – The maximum crushing work index of a set of specimens, metric units. • Std Dev – The standard deviation of crushing work index of a set of specimens, metric units. • WiC density – The coarse particle density measured in a crushing work index test, t/m³. The `wirm` (rod mill work index) table includes the following fields:
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Bond Work Index Formula-Equation
When Erf/Erp is greater than 1.29, the work index increases as the product size decreases, and when Erf/Erp is less than 1.29 the work index decreases. Eq. (8) suggests that a standard work index Wi100, or the work index at 80% passing 100 microns calculated from the exposure ratios, can be found from the following Eq. (9):
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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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BENCHMARKING COMMINUTION CIRCUIT …
388 Hay Street Subiaco, Western Australia 6008 Abstract ... From these comparisons, empirical constants were applied to the laboratory test results so that the pilot ... (GMG, 2015), with the rod mill taking 25% and the crushing work index 5%. Newmont's operations cover the full range of the BWi energy curve, with Mine 7 the most competent ...
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Comparison of measures of rock crushability
The crushing work index (CWi), estimated on the basis of the twinpendulum test, has been proposed by Fred Bond and accumulates a long track record in predicting the performance of crushing...
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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 …
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A Statistical Comparison of Bond Ball Mill Grindability …
direct comparison of the actual testing apparatus used for Bond Work Index determinations. While the Bond Work Index and procedure have become a world standard for measuring the energy required to grind material and designing grinding circuits, the test is highly empirical and can vary significantly as a result. According to one isolated study ...
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BENCHMARKING COMMINUTION CIRCUIT …
The standard Bond method to define specific energy requirements requires crushing, rod, and ball work indices to be determined. Whereas, this dataset contained only the Bond ball milling work …
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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 least 10, preferably 20 test runs. Adjustable crushing angle; Repeatable crushing results; Safe two-hand operating buttons; The Bond Crushing Work Index (CWI) describes the competency of the ore at ...
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Crushing Work Index and UCS
It is not recommended to use UCS as a proxy for the Bond crushing work index, or vice versa. If you insist on doing so, there are several potential regression equations above that you may choose ...
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Distribution of impact (crushing) work index for selected …
The traditional Bond work index proposed by F.C. Bond over 60 years ago is still today a useful tool for characterizing material crushability and grindability in the minerals industry.
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Comminution testing
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.
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Relationship between A*b and Bond impact work index for …
The crushing work index (CWi), estimated on the basis of the twinpendulum test, has been proposed by Fred Bond and accumulates a long track record in predicting the performance of crushing ...
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The Importance of Work Index in Mineral …
The number of kittowatts consumed in a hour divided by the tonnes of rock gives you your work index. Remember, the higher the Work Index the more work required to crush the rock. This will impact the equipment chosen for your …
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Bond Work Index Tests
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 depending on your requirements.
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Bond Impact Crushing Work Index -Procedure
Sizing a crusher can be done reliably calculated thanks to the Impact/Crushing Work Index and the testwork research done by Fred Chester Bond and his 1952 paper.
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Compare and Understand Rod/Ball/Impact …
Three Bond work index tests are commonly used in the industry. This essay discusses some observations from SAGMILLING database of published grindability results about relationships, and lack thereof, between the Bond comminution tests. A further comment is made about the Bond abrasion index a…
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sbm/sbm crushing work index comparisons.md at master
sbm / sbm crushing work index comparisons.md. chengxinjia 2567a2622d sbm. 18:35:50 +08:00. 28 KiB Raw ...
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