Cleaning and Storing of Ball Mill Charge after the Bond Work Index Procedure is done Add about 500 g of silica sand into the mill containing the ball charge Seal the mill Rotate for 20 revolutions to clean Empty the mill charge and sand into the ball try once grinding is complete
The ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100 passing 336 mm 6 mesh to product size in the range of 45150 µm 325100 mesh thus determining the ball mill work index Wi B or BWi The work index calculations across a narrow size range are conducted using the appropriate laboratory work index determination for the material size of interest or by
Get DetailsThe Bond Ball Mill Work Index BBWi test is carried out in a standardised ball mill with a predefined media and ore charge The test requires a minimum of 10kg of sample that has been stagecrushed to 100 passing size of 335 mm
Get DetailsThe 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 The test much achieve a
Get DetailsThe 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 It is a locked cycle test conducted in closed circuit with a laboratory screen
Get DetailsThe grinding jar of the Bond Index Ball Mill measures 12″ x 12″ and has wellrounded corners The grinding jar for the Bond Index Rod Mill is 12″ x 24″ in size and has a waveshaped design At least 15 to 20 kg sample material is required to simulate a closed grinding circuit in a ball or rod mill
Get DetailsSimilar to a Comparative Work Index this test is an open circuit dry batch grindability test run in the standard Bond Ball Mill for a set time It can be used at mesh sizes from 65 to 200 mesh normally 100 mesh The test requires calibration against the standard
Get DetailsThe corrected ball mill operating work index using this method is 133kWht which is close to the Bond ball mill work index of the ore 134kWht which can be backcalculated from the corrected ball mill operating work index by rearranging the Bond formula 11
Get DetailsThe standard Bond Ball Mill Work Index test 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 standard Bond mill A Bond mill is 0305m by 0305m with rounded corners a smooth lining and runs at 70rpm
Get DetailsInsmart make Bonds work index ball mills are manufactured strictly as per the standard of Dr F C Bond Both the mills are supplied with recommended grinding media and assorted sizes of balls The Work Index ball bill is supplied with software
Get DetailsThe 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 DetailsA Bond Ball Mill Work Index test is a standard test for determining the ball mill work index of a sample of ore It was developed by Fred Bond in 1952 and modified in 1961 JKMRC CO 2006 This index is widely used in the mineral industry for comparing the resistance of different materials to ball milling for estimating the energy required
Get Detailsare 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 DetailsBond Index Ball MillRod Mill BT 100 XLRETSCH The 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
Get DetailsThe Bond work index W i is widely used in the mineral industry for comparing the resistance of different ores to ball milling and can be used to estimate the energy re quired for grinding
Get DetailsIt 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 This Work Index Ball Mill additionally called plant for measuring bond work record is a key gadget for measuring granulating work
Get DetailsAccording to the Bond standard procedure the work index is determined by simulating a dry grinding in a closed circuit in the Bond ball mill to achieve 250 circulating load Bond 1949 1952 1961 The test is performed on a raw material approximately weighing 10 kg which coarseness is 100 3327 mm
Get DetailsThe Bond work index Wi is defined in a Bond ball mill on the samples of standard size − 3327 0 mm
Get DetailsThe test work involved Bond ball mill testing rod milling low intensity magnetic separation LIMS and batch ball milling down to product sizes of around P8025 microns A total of 18 Bond tests and over 150 batch grinding tests and sieve sizing were carried out Throughout the grinding tests power draw was continuously monitored
Get Details2 MODELLING THE SPECIFIC GRINDING ENERGY AND BALLMILL SCALEUP Ballmill scale up Bond’s 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 DetailsWork Bond Index For Ball Mill HOME Work Bond Index For Ball Mill Stationary Crushers Grinding Mill Mobile Crushers Mining Machine European Type Jaw Crusher European Type Jaw Crusher is a new crushing machine the jaw LEARN MORE Jaw Crusher As a
Get Detailsthe work index depending on the grind size In this way work index values are usually obtained for some specific grind size that characterizes the grinding operation to design or under evaluation This study was carried out in a standard bond ball mill 305 mm x 305 mm size
Get DetailsThe Bond Ball Mill Work Index BBWi test is carried out in a standardised ball mill with a predefined media and ore charge The test requires a minimum of 10kg of sample that has been stagecrushed to 100 passing size of 335 mm Any screen size below 600µm can be used for the testwork depending on your requirements Learn More
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