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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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The standardbond ball millworkindextest procedure is firstly to stage crush the feed to minus 335mm and size a representative sample the test then involves a series of batch grinds in a standardbond millabond millis 0305m by 0305m with rounded corners a smooth lining and runs at 70rpm the charge consists of 285 balls weighing a.
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.
TheBondworkindex, Wi, is defined in aBond ball millon the samples of standard size − 3.327 + 0 mm. In practice, it is possible to find materials of non-standard size that are finer than 3 ...
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.
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.
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
BondWorkIndex(BWI) & Hardgrove GrindabilityIndex(HGI) tests for biomass & coal. • BWI can predict the potential formillchoking of biomass in a tube andball mill. • HGI is a poor method of predicting grindability of biomass in vertical spindlemills. • Pellets should be composed of pre-densified particles close to the target size. •
Dec 12, 2016· The basic parameters used inball milldesign (power calculations), rodmillor any tumblingmillsizing are; material to be ground, characteristics,BondWorkIndex, bulk density, specific ...
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 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 …
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 ...
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