This Grindability Test orBond Ball MillWorkIndex Procedureis used to determine theBondWorkIndexof minus six mesh or finer feed ore samples. These equation application methods are used to process <1/2″ ore samples in aBall Millusing a standardballcharge. Below describes in general terms theBondWorkIndex Procedureused by a Professional Metallurgical Testing Laboratory.Get Price
TheBond Ball MillWorkIndexis a measure of the resistance of the material to grinding in aball mill. It can be used to determine the grinding power required for a given throughput of material underball millgrinding conditions. It is a 'locked cycle' test conducted in closed circuit with a laboratory screen.
First, a JarMillgrindability test requires a 5 lb. (2 kg) sample and produces a direct measured specific energy (net Hp-hr/t) to grind from the design feed size to the required product size. The second test, aBondWorkIndexdetermination, results in a specific energy value (net Hp-hr/t) from an empirical formula.
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.
TheBond Index Ball Millis supplied standard with a barrel and rotating yoke assembly and the electric motor drive with a standalone bench, funnel and screen. Safety is a prime consideration for all Alsto equipment and theBond Index Ball Millis supplied equipped with acoustic enclosure.
BondWorkIndexProcedure and Method. 2020-05-18· Cleaning and Storing ofBall MillCharge after theBondWorkIndexProcedure is done: Add about 500 g of silica sand into themillcontaining theballcharge. Seal themill. Rotate for 20 revolutions to clean. Empty themillcharge and sand into theballtry once grinding is complete.
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
Quick method forbond work index approximate value determination. 331. ... TheBondworkindex, Wi, is defined in aBond ball millon the samples of standard size − 3.327 + 0 mm. In practice, it ...
TheBond Indexconformingball chargeconsists 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 grindingballsis 285. However, theballdiameters vary due to wear. Therefore, the totalball numbershould 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 …
BondRodMillGrindability Test. The test determines theBondRodMillWorkIndexwhich is used withBond’s Third Theory of Comminution to calculate net power requirements when sizingball mills*. Various correction factors may have to be applied. The test is a closed-circuit dry grindability test performed in a standard rodmill. Contact Us
Here is the old Allis-Chalmers Bond Work Index Grindability Test Procedure. The standard feed is prepared by stage crushing to all passing a 6 mesh sieve, but finer feed can be used when necessary. It is screen analyzed and packed by shaking in a 1000-cc graduated cylinder, and the weight of 700 cc is placed in the mill and ground dry at 250 per cent circulating load.