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Get PriceThe FC Bond ball Mill comes with table stand pictured motor clutch revolution counter motor starter and controls 12 machined steel drum 4412 pounds of steel balls Bond Index test receiving pan and hand screen pan
bond ball mill work index testwork providers bond ball mill work index testwork providers 11 Jun 2012 Gulin supply Mining and construction equipment for mineral handling The crushing screening washing
Get PriceBall mill design requires a Bond work index BWi for ball mills at the correct passing size SAG mill design requires an appropriate SAG test for example SPI Chapter 5 Flotation design needs a valid measure of kinetics for each sample including the maximum attainable recovery and rate constants for
Get Price2 MODELLING THE SPECIFIC GRINDING ENERGY AND BALLMILL SCALEUP Ballmill scale up Bonds LawData zBond work index w i zFeed D f and product d size both 80 cumulative passing Result The specific grinding energy w Mill power draw P wT where T the mill capacity Mill dimensions from Tables or charts
Get PriceHowever in this situation the ball mill has to supply this energy and it has a different higher work index than the crusher ie the ball mill is less energy efficient than a crusher and has to input more energy to do the same amount of size reduction Hence from equation 7 to crush to the ball mill circuit feed size x 2
Get PriceThe ball mill work index is con rmed at 16 kWht The operating work index though is in the range of 21 kWht to 25 kWht showing high inef ciency This raises the point that in some cases the Bond EF4 oversize factor calculation is not suf cient to compensate for the milling inef ciencies that arise
Get PriceBond ball mill and grind for an arbitrary number of mill revolutions N 1 50 100 or 150 revolutions After grinding screen the sample on the comparative sieve and determine
Get PriceMeasuring ore grindability in rod mills The Bond Rod Mill Work Index is a measure of the resistance of the material to grinding in a rod mill It can be used to determine the grinding power required for a given throughput of material under rod mill grinding conditions It is a locked cycle test conducted in closed circuit with a laboratory screen
Get PriceBecause of the difficulty in determination of this index alternatives to the standard method have been developed by many researchers Vedat and Huseyin 2003 In the determination of ball mill work index 15 kg of representative ore at 100 335 mm is crushed to 100 335 mm Amtech 2006
Get PriceOct 15 2015 Bond Work Index BWI Hardgrove Grindability Index HGI tests for biomass coal BWI can predict the potential for mill choking of biomass in a tube and ball mill HGI is a poor method of predicting grindability of biomass in vertical spindle mills Pellets should be composed of predensified particles close to the target size
Get PriceBond Ball Mill Laboratory Scrubbing testwork Batchlaboratoryscrubbingtestworkareconductedusinga scrubber having a diameter of 1 m The variable speed unit is Bond Rod Mill Point load test ThePointloadtestinghasbeenusedformany yearstodeterminerockstrengthingeotechnical neratedcanbeusedinvariability studiestoclassifyoresindifferentdomains
Get PriceOct 19 2017 Lets sum up The grinding balls diameter determined by the Bond formula has a recommendatory character and serves as a starting point for calculating the necessary proportion grinding media feeding a new mill More precisely adjust the ball load in
Get PriceWork Index Ball Mill alluding to the grind ability list of Metals is utilized to demonstrate the granulating trouble of the material It is measured by a rule that to compute the work file ball plant in light of yield of every unrest of the factory after the material is ground to an adjusted state by the predetermined plan
Get Priceball mill can be reorganised as 7 and 8 where BWio and AWio are the corrected operating work indices and WAGSAG WBM are the respective power draw of AGSAG and ball mills Note that the ball mill operating work index is applied only on the portion that needs the additional grinding Q2 which renders to the AGSAG mill the
Get PriceJKTech Laboratory Services Bond Ball Mill Index Test BRMWI A Bond Ball Mill Index Test BBMWI is a standard test for determining the Ball Mill Work Index of a sample of ore The BBMWI is a measure of the resistance of the material to crushing and grinding
Get Priceare the Bond Work Index Wi values Bond 1952 divided into a low energy crushing work index Wi C for coarse rocks 7550 mm a rod mill work index Wi RM for intermediate sized particles 253 mm and a ball mill work index Wi BM for small particles 3 mm Ammtec 2000 Laboratory
Get PriceThe 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 Mill grinding Wikipedia 20190619 W is the work index measured in a laboratory ball mill kilowatthours per metric or short ton P 80 is the mill circuit product size in
Get Pricestandard Bond crushing and rod mill work indices abrasion indices and by Dawson for Bond Ball Mill Work Index tests using crushed feed and Standard Autogenous Grinding Design SAGDesign Tests patented by Outokumpu
Get PriceThe Bond ball mill work index test is thought to be additive because of its units of energy nevertheless experimental blending results show a nonadditive behavior The SPIR value is known not to be an additive parameter however errors introduced by block kriging are not thought to be significant
Get PriceHere is the old AllisChalmers 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 1000cc graduated cylinder and the weight of 700 cc is placed in the mill and ground dry at 250 per cent circulating load
Get PriceThe Bond ball mill work index is one of the most commonly used grindability tests in mining and is often referred to as the Bond work index The test is a lockedcycle test where ground product is removed from test cycles and replaced by fresh feed
Get PriceMeasuring ore grindability in balls mills The Bond Ball Mill Work Index is a measure of the resistance of the material to grinding in a ball mill It can be used to determine the grinding power required for a given throughput of material under ball mill grinding conditions
Get PriceA Bond Ball Mill 12 x 12 of fabricated construction comes with electric motor and gear reducer drive digital counter jogging button to provide positioning of drum for loading and unloading emergency stop button 44 lb ball charge stand and receiving pan
Get PriceThe Bond Index conforming ball charge consists of 43 x 145 balls 67 x 117 balls 10 x 1 balls 71 x 075 balls 94 x 061 balls The optimum number of grinding balls is 285 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 20125 grams The grinding jar of the Bond Index Ball Mill measures 12 x 12 and has well
Get PriceFor overflow ball mills the charge should not exceed 45 of the mill volume For grate discharge mills the charge should occupy about 50 of the mill volume Bond developed 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 the mill R ie
Get PriceBond ball mill of DL 0304803048 m dimensions at the speed of 70 rpm The mill is loaded with 21125 kg standard sized balls and 700 cm3 of grinded materials to under 335 mm The test procedure takes from 7 to 10 grinding cycles with the required amount of material for whole procedure being approximately 10 kg Once
Get Pricegrindability is Bonds work index which is defined as the resistance of the material to grinding The standard equation used by them for the ball mill work index Bond work index is as follows 230 82 1 10 80 10 80 445 1 P G P F W i bg i u 4 In designing and optimizing a milling circuit using Bond
Get PriceThe grindingproduct size P in a Bond ball mill which is given by the aperture size which passes 80 of the grinding product as a function of the aperture size of the test screen P k can be expressed by the formula P P k K 2
Get PriceBond Ball Mill Index Test JKTech A Bond Ball Mill Work Index may also be used in the simulation and optimisation of existing mills and the associated grinding circuits Sample Requirements A minimum of 10 kg of material crushed to nominally minus 10 mm is preferred
Get PriceBond Ball Mill Work Index Crushed Feed Specific Gravity part of the SAGDesign test The results from this work are presented below and are discussed in this paper
Get PriceCharge Height Generally For overflow ball mills the charge should not exceed 45 of the mill volume For grate discharge mills the charge should occupy about 50 of the mill volume Bond developed a relationship that can be used to determine the percent charge by volume as a function of the vertical height above the charge He
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