Rock Crushing Work Index

Rock Crushing Work Index

Bond Impact Crushing Work Index -Procedure and Table of ...

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. According to Bond’s Third Theory of Comminution, the work/energy input is proportional to the new crack tip length created during particle breakage and equivalent to the work represented by the product – the feed.

Bond Impact Crushing Work Index Testing Machine - Pendulum ...

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 larger particle sizes.

working index for crushing rocks

Crushers and Equipment Technology in Mining | Crushers ... Crushing is the first step of mineral processing where the ore/rocks from the mine .... Crushing Work Index test that determine the bond crushing work index that...

Compare and Understand Rod/Ball/Impact-Crushing/Abrasion ...

The Bond crushing (impact) work index (Wi C, CWi, LEIT or IWi) conducted on specimens of a nominal dimension between 50 mm and 75 mm. The product size is not relevant to this test; it is a determination of the energy to the “first fracture” that substantially breaks the rock.

Comparison of UCS to Bond Work Indices

The three rock types do show a mild correlation between crushing Work Index and UCS (R² values between 0.1 and 0.4). Unfortunately, the correlation observed does not make sense: the correlation is expected to be positive (increasing towards the right) rather than negative (decreasing towards the right).

Bond Impact Crushing Work Index Tester - YouTube

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Crushing work index Calculation - Crushing, Screening ...

As Alex told you: The crushing work index you calculated appears mostly correct. The only correction factor that might affect the calculation is to correct for the efficiency of the motor -- the work index is based on motor output (pinion) power, whereas the measurement of motor power is usually based on motor input power.


Hardgrove index and brittleness test can be carried out easily on only those ores or rocks or materials, which are soft, friable and brittle [1-3]. Indices with which the crushing resistance or the grindability in a wide meaning is expressed include the Rittinger number, crushing resistance, Hardgrove index and Bond work index.

Comparison of Ore Hardness Measurements for Grinding Mill ...

standard Bond crushing, and rod mill work indices, abrasion indices and by Dawson for Bond Ball Mill Work Index tests using crushed feed, and Standard Autogenous Grinding Design (SAGDesign) Tests, patented by Outokumpu. (See reference 8 below). The comparison of these results gives context to how the various measurements relate to each

Geometallurgy - Wikipedia

The Bond ball mill work index test is thought to be additive because of its units of energy; nevertheless, experimental blending results show a non-additive behavior. The SPI(R) value is known not to be an additive parameter, however errors introduced by block kriging are not thought to be significant.


USING THE SMC TEST® TO PREDICT COMMINUTION CIRCUIT PERFORMANCE ... = ®Crushing ore work index and is provided directly by SMC Test The coarse ore hardness parameter (S) makes allowance for the decrease in ore hardness that becomes significant in relatively coarse crushing applications such as primary and

Fred Chester Bond - Wikipedia

In the 1930s through early 1950s, Bond developed a new theory of comminution that introduced an index, called the Bond Work Index, which relates power consumption in crushing and grinding to the feed and product size distribution. His theory and index …

Crusher - Wikipedia

A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust.. Crushers may be used to reduce the size, or change the form, of waste materials so they can be more easily disposed of or recycled, or to reduce the size of a solid mix of raw materials (as in rock ore), so that pieces of different composition can be differentiated.

Testwork: Bond crushing work index - SAGMILLING.COM

Crushing mill work index is used in the SAGMILLING.COM Bond/Barratt specific energy consumption model. The work index is used to calculate the energy requirement to break rocks in the coarse size range, from >100 mm down to about 10 mm - 20 mm.

Size Reduction Equipment - for Bulk Materials Including:

AdLump Breakers, Pin Mills, Shredders, Knife Cutters, Hammer Mills, Attrition Mill

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