The test is a per-specimen test where individual specimens of prepared rock are hand-picked by the test operator and placed into the apparatus.Bond Work Index For Crushing Coal Delumper75 Lp Crusher A Bond Ball Mill Work Index test is a standard test for determining the ball mill index of a sample of ore It was developed by Fred Bond in 1952.
Standard size ranges and the related Bond work indexes Feed size F 80 μm Product size P 80 μm Work index 100000 10000 crushing CWI 10000 2100 rod milling RWI 2100 100 ball milling BWI Fig. 1.
Bond impact work index and abrasive Products. As a leading global manufacturer of crushing grinding and mining equipments we offer advanced reasonable solutions for any size-reduction requirements including Bond impact work index and abrasive quarry aggregate and different kinds of minerals.
where Wi is the Bond Work Index again in energy per unit mass terms. The index is defined as the energy required to crush from infinite size down to 100 m hence the 10 inside the brackets. Bonds Work Index values in kWh per short ton i.e. 2000 lbs or 907 kg roughly follow the Mohs scale of hardness see Table 11.1.
Characterization of rocks for selection of crusher can be done in different ways and the most commonly used is Bond work index Tavares and Carvalho 2007. Holmes 1957 proposed a modification.
The work index covering grinding in tumbling mills of coarse sizes is labelled M. ia. The work index covering grinding of fine particles is labelled M. ib Morrell 2008. M. ia. values are provided as a standard output from a SMC Test Morrell 2004. a whilst M. ib. values can be determined using the data generated by a conventional Bond.
Effect of core diameter on the Bond impact crushing work index test 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.
WORK INDEX •Work Index Wi is the gross energy requirement in kilowatt hour per ton of feed kWhton of feed to reduce a very large particle to such a size that 80 of the product will pass through a 10micrometer or 0.1 mm screen. •If Dp is in mm 𝑊𝑖𝐾 1 𝐷𝑝𝑝 𝐾 0.1𝑊𝑖0.3162𝑊𝑖 I 0.
The Bond Work Index is material specific and is obtained from laboratory crushing tests on the feed material. Hard and brittle materials have a work index in the range 4 10 4 − 8 10 4 Jkg. Bonds law holds reasonably well for a variety of materials undergoing coarse medium and fine size reduction. Eq. 14.
moving surface of a crusher roll or jaw plate and the stationary plate surface at which point the material will be pinched. Angle varies with machine size and material lump size. Bond Work Index BWI — Kilowatt hour kWh per short ton required to reduce the material to 80 passing 100 microns.
Apr 29 2013 crushing experiments show that the capacity of a jaw crusher is dependent.. they are empirically based laws that only fit experimental data over a limited range of.. free to pass through the crushing chamber at any time the breakage process the most utilized for jaw crushers compressive strength and the work index.
specimen Bond 1947 and then the crusher work index CWI or impact work index is calculated. The test is generally performed on 20 rocks in the -76.250.8mm size fraction.
Bond Work Index For Coal In Crusher- SPECIAL Mining machine. Coal crushing work index youtube 14 oct 2013 bond work index for coal in crusher crusher machinebauxite crushing bond work equation for jaw crusher get price mill grinding wikipedia with w as grinding work in kjkg w is the work index measured in a laboratory ball mill this type of mill uses the same principle as vsi crusher.
Aug 01 2005 The Bond work index is one of the most useful and interesting parameters used in designing grinding equipment. However it must be obtained under restrained conditions especially in regards to the Bond standard lab mill. The main objective of this study is to show how this index can be obtained using a Denver ball mill which is present in most mineral processing laboratories.
The test is a per-specimen test where individual specimens of prepared rock are hand-picked by the test operator and placed into the apparatus.Bond Work Index For Crushing Coal Delumper75 Lp Crusher A Bond Ball Mill Work Index test is a standard test for determining the ball mill index of a sample of ore It was developed by Fred Bond in 1952.
meaning is expressed include the Rittinger number crushing resistance Hardgrove index and Bond work index. The Bond work index is regarded as one of the crushing resistance; it can therefore be presumed that the Bond work index is correlated to the mechanical properties of materials 4.
FIGURE 1 BOND CRUSHING WORK INDEX v. UNCONFINED COMPRESSIVE STRENGTH 0 100 200 300 400 UCS MPa 10 20 30 40 50 WiC metric The scatter of the points in Figure 1 indicates no correlation between crushing work index and UCS.
Bond impact work index and abrasive Products. As a leading global manufacturer of crushing grinding and mining equipments we offer advanced reasonable solutions for any size-reduction requirements including Bond impact work index and abrasive quarry aggregate and different kinds of minerals.
Wic Bond Impact Crushing Test Work Index kWht WioACT Actual Operating Bond Work Index determined from measurements on the circuit kWht WiRM Bond Rod Mill Test Work Index kWht WiSTD Standard Circuit Bond Work Index expected or designed used for circuit design. Specific energy requirement at the drive pinions. 3.KEYWORDS Work Index.
Apr 07 2020 It is not recommended to use UCS as a proxy for the Bond crushing work index or vice versa.
The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. Its value constitutes ore characteristic and is used for industrial.