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ThisGrindability Test or Bond Ball Mill Work Index Procedureis used to determine theBond Work Index of minus six mesh or finer feed ore samples. These equation application methods are used to process <1/2″ ore samples in a Ball Mill using a standard ball charge. Below describes in general terms the Bond Work Index Procedure used by a Professional Metallurgical Testing Laboratory.
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Bond Ball MillGrindability Test. TheBond Ball MillWorkIndex(BBWi) test is carried out in a standardisedball millwith a pre-defined media and ore charge. The WorkIndexcalculated from the testing can be used in the design and analysis ofball millcircuits.
Testwork:Bond ball millworkindexSAGMILLING.COM. TheBond ball millworkindexis one of the most commonly used grindability tests in mining, and is often referred to as theBondworkindex.. The test is a 'locked-cycle' test where ground product is removed from test cycles and replaced by fresh feed.
The Bond Index conforming ball charge consists of:43 x 1.45” balls;67 x 1.17” balls;10 x 1” balls; 71 x 0.75” balls ; 94 x 0.61” balls; The optimum number of grinding balls is285. However, the ball diameters vary due to wear. Therefore, the total ball number should be adjusted from time to time to ensure a total mass of 20.125 grams. The grinding jar of the Bond Index Ball Mill measures 12″ x 12″ and has well …
3Index Bond Ball MillGruppo Interforce Area Jonica . Labtech 3index bond ball mill bondfor 50 mm d 005 mm w is the workindexmeasured in a laboratoryball millkilowatthours per metric or short ton p 80 is themillcircuit product size in micrometers f 80 is themilllabtech 3index bond ball mill. More Details
The ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100% passing 3.36 mm (6 mesh) to product size in the range of45-150 µm(325-100 mesh), thus determining the ball mill work index (WiB or BWi).
This Table of Ball Mill BondWork Index of Mineralsis asummary as tested on ‘around the world sample’. You can find the SG of each mineral samples on the other table.
ABond Ball MillWorkIndexmay also be used in the simulation and optimisation of existingmill(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 theBond Ball MillWorkIndextest feed.
For overflowball mills, the charge should not exceed 45% of themillvolume . For grate dischargemills, the charge should occupy about 50% of themillvolume .Bonddeveloped a relationship that can be used to determine the percent charge by volume as a function of the vertical height above the charge, He, and the radius of themill, R, i.e.,
XMGQΦ305 Grinding WorkIndex Ball(Rod)Mill. Description; XMGQΦ305 GrindingBond Ball(Rod)Millis mainly applied for testing the grinding workindexof the material of every kinds of ores, slag, etc. Under the specific rotation speed for dry grinding, then screening the products, weighing, repeat operation several times, getting the ...
When F is the size in microns which 30 per cent of the new ball mill feed passes, P is the microns which 80 per cent of the last cycle sieve undersize product passes, and P1 is the opening in microns of the sieve size tested, then ball mill work index Wi is calculated from the following revised (1960) equation:
Bond/Rowland Single StageBall MillModel. This is a multi-stage crushing plant feeding aball millmodel that estimates the specific energy consumption (E BM) using the Rowland interpretation of the classicalBondworkindexequation including Rowland efficiency factors.. Testwork Required
Dec 12, 2016· The basic parameters used inball milldesign (power calculations), rodmillor any tumblingmillsizing are; material to be ground, characteristics,BondWorkIndex, bulk density, specific ...
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