crusher were studied, and the results were discussed with respect to the fracture behaviour modelled by PFC3D software. Then, the determined work done by the jaws of the crusher were compared with those of the Bond crushing energies (estimated from the Bond crushability index) of the rocks. Also, the effect of the Bond crushability index on the
· The Bond work index of the unknown ore can then be estimated from the equality given in Equation . (3.49) W iU 1 P U − 1 F U ≈ W iREF 1 P REF − 1 F REF where. W iU = Bond work index of the unknown ore. W i REF = Bond work index of the reference ore. F U, P U = F 80 and P 80 of the unknown ore. F REF, P REF = F 80 and P 80 of the reference ore
· 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 …
Bond Work Index (BWI) — Kilowatt hour (kWh) per short ton required to reduce the material to 80% passing 100 microns. Breaker Block (Breaker Plate) — The steel anvil surface of a crusher against which material is crushed by impact or pressure. Bridging — Blocking of crusher opening by …
Lastly, substituting all the values in equation 1 the Bond work index of the ore was determined to have a value of 41.38 kWh/tone. The Bond work index, in addition to it as being the measure of the material''s hardness or resistance to crushing and grinding, gives an important indication of the efficiency of the machine being used. The larger the Bond work index, the larger the consumption of ...
Work Index, Work Index Efficiency, Bond Work Index testing 4 TRODUCTION AND BACKGROUND The Bond method allows for quantification and com-parison of relative energy efficiencies of most industrial comminution circuits. It is an essential tool for managing the important business (cost) of grinding. For early analyses of plant grinding ...
· The main influence on the Si index is from the material itself, however the impact crushing action causes the material to fragment along natural lines, rather than being sheared off in a cone crusher.
Bond Crusher Work Index Pendulum Test In Ethiopia. A New Size Distribution Model By Tfamily Curves For . Nov 01 2011 Bond Work Index Kw Ht P I Test Sieve Size At Which The Test Is Performed 106 M G Bg Twin Pendulum Test Relies On The Particle Being Broken Between An Input Pendulum Released From A Known Height And A Rebound Pendulum In Crusher ...
the Bond work indexes of crushing, rod milling and ball milling. The authors exemplify the described method application and compare the obtained estimates with the factual field test data. The article presents mathematical framework of a method used by RIVS to …
Bond''s approach consists of determining the ore hardness characteristics, or Work Index (Wi) via standardized laboratory testwork. The full suite of Bond comminution tests provide the Ball Mill Work Index (BWi), the Rod Mill Work Index (RWi), the Crusher Work Index (CWi) and the Abrasion Index …
Bond work index reduction In applications where the HPGR is followed by ball milling, the induced micro fractures generally result in a reduction of the Bond Work Index. For most ores this reduction ranges between 10-25%. Obviously this allows for grinding at either an …
· Bond Crusher Work Index operatie003 . Bond Work Index Formula-Equation. The Bond work index is not solely a material constant but is influenced by the grinding conditions. For example, the finer the grind size desired, the higher is the kWh/t required to grind to that size.
None of the individual Work Index versus UCS graphs displayed a correlation with Unconfined Compressive Strength. Figure 7 shows an attempt to relate the sum of all Bond Work Indices to the UCS. The Y-axis on this graph measures Wi C+Wi RM+Wi BM. The sum of the Bond Work Indices fails to show a relationship to UCS.
Bond Impact Crushing Work Index Testing Machine - Pendulum ...
Apr 23, 2020nbsp018332the bond work index of the rock. this number will be used to calculate the power required to produce the final product. calcpower usedpower calc the calculated power to produce the crusher product. power 10.0 sq bwi 1.0sqrtp 80 - 1.0sqrtf 80 where sq is the solid mass flowrate bwi is the bond work index p80 and f80 are in m.
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.
Bond Work Index For Coal In Crusher- SPECIAL Mining machine. Coal crushing work index 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.
The Bond work index (Bond, 1960) ... The gape was 813 mm and the width of hopper 1067 mm. 90% of the ore commenced crushing 200 mm from the bottom of the crusher. The Bond index was estimated as 15 kWh/t. Assuming that the density of the limestone was 2.6 t/m 3, determine 1.
· In addition, in crusher selection was played an important role of the standard the Bond grindability and work index values. The t-curves are the family of size distribution curves which can be used to describe the product size distribution of the breakage …
Bond Indices Cost For Crushing Machine Products . ... Irajin Design And Fabrication Of Crusher. ... Crusher Plant Lignite. Crushing Work Index Calculation Crushing Screening. I have a question about CWi have an existing plant and I want to calculate the CWi based on Bond formulation and pare it with lab tests the existing plant the data ...
BOND WORK INDEX (KWH/T) LOS ANGELES VALUE UCS (MPa) Very Easy 50+ 0 - 7 27+ 0 - 90 Medium 40 - 50 7 - 10 22 - 27 90 - 150 Difficult 20 - 30 14 - 18 12 - 17 220 - 300 Very Difficult 10 - 20 18 + 5 - 12 300 + Abrasiveness CLASSIFICATION FRENCH ABRASIVENESS ( G/TON) ABRASION INDEX Non Abrasive 0 - 100 0.0 - 0.1 Slightly Abrasive 100 - 600 0.1 - 0.4
The Bond Work Index of a material is defined as the required energy to reduce one ton of that material from a notional infinite size to a P80 size of 100 µm, the Bond grindability test is conducted to determine the Bond work index (Wi) via Standard Bond Ball Mill which having the dimensions
bond 26 2339 3 s rod mill for work index. 19.0 MINERAL RESOURCE AND …. Table 18.3: Bond Crushing work index Results . power calculation of impact coal crusher based on bond work ...
· Source 1: Table of materials reported by Fred Bond Source 2: Outokumpu, The science of comminution Source 3: Equipment and pipelines Source 4: Tenova Bateman mills (AG/SAG, Rod, Ball Mills) Source 5: Doering international Source 6: SME handbook of mineral processing, N.L Weiss Editor, NY 1985. Bond Work Index Tester
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 net power requirements for sizing crushers.
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 -76.2/+50.8mm size fraction. One of the strengths of the test is its ability to measure the natural dispersion in the
· SAMPLING REQUIREMENTS Information Gained • Preliminary drill core for resource definition and split for bond work indices • Whole core for Autogenous Media Competency Index, Impact crusher work indices and fracture frequency • Bulk Sample, large diameter drill core, open pit or underground for pilot plant testing Effect on Circuit ...
The Bond work index is not solely a material constant but is influenced by the grinding conditions. For example, the finer the grind size desired, the higher is the kWh/t required to grind to that size. Magdalinovic [38] measured the Bond work index of three ore types using different test screen sizes. He produced a correlation between the mass of test screen undersize per revolution, G, and ...
Bond crushing (impact) work index In general, the impact or crushing work indices (CWi) calculated from test work carried out on machines conforming to Bond''s Comparison between bond crushing energy and fracture energy of ...
The Bond crushing work index test (sometimes called the "impact work index" test) is noisy, and the difference you observed is perfectly reasonable. The paper by Angove & Dunne (1997) reports a standard deviation in crushing work index tests across laboratories as 4.5.