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SAG mills selection methods. III. The F. Bond index calculation (crushing)
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 + …
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.
bond work index value for line crusher
The Bond work index most commonly referred to is the BBM work index. This value is obtained in a 12" 12" laboratory mill running at 70 rpm, with rounded inner edges and without lifters. The …
Equipment Sizing: Crusher or Grinding Mill
By referring to equipment manufacturer's bulletin on crushers, Fig. 1, a crusher producing 80% passing 3/4″ requires a close side setting of approximately 5/8″. Since the …
Relationship between A*b and Bond impact work index for …
Also, values of crushing work index (CWi) increased inversely with the A*b breakage index, as commonly observed (Napier-Munn et al., 1996; Tavares and Silveira, 2008). In order to …
1 Comparison of measures of rock crushability
6 L.M. Tavares & M.A.C.W. da Silveira The Bond work index has also been used, in conjunction with empirical relationships, to estimate capacity factors of jaw, cone and gyratory crushers
Impact Crushing vs. Cone; The Effect on Aggregate LA values …
As we can see in the chart below, taken from an extensive study completed by the technical university of Munich, the varying types of stone all have a significantly lower Si index …
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 …
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 …
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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 + …
Impact Work Index Procedure
Impact Work Index Procedure This is or was used by to acquire the Impact (AKA Crushing) Work Index for sizing crushers. Use this in complement to the Bond …
Bond Work Index Formula-Equation
For any circuit, whether a crushing circuit, a rod mill, or a closed ball mill circuit, the Work Index always means the equivalent amount of energy to reduce one ton of the ore from …
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CORRELATION BETWEEN BOND WORK INDEX AND …
The value of Bond work index of the above samples has shown a variation from 10.8 kwh ton-1 for bauxite (high abrasion value and low compressive strength) to 20.4 kwh ton- 1 ... Literature …
Summary of results from Bond crushability and impact load cell …
In the case of the Bond twin-pendulum device, data from 22 additional materials with widely variable values of crushability index, including copper and iron ores, bauxites, limestones, coals...
11 Crushing and classification
Work Index values, in kWh per short ton: i.e. 2000 lbs or 907 kg, roughly follow the Moh's scale of hardness, see Table 11.1. In Summary, Kick's law is better for larger particles and Rittinger's
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Crushing and Screening Handbook
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A Detailed Overview of Cone Crushers and What You Need …
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Compare and Understand Rod/Ball/Impact …
Relation of Bond rod mill work index and 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 …
Bond Work Index Formula-Equation
The basic work index equation is: W = 10 Wi/√P – 10 Wi/√F(1) where W is the work input required in kilowatt hours per short ton to grind from 80% passing F microns to 80% passing P microns, and Wi is the work index, or the grinding resistance parameter. It represents the energy input required in kilowatt hours to …