Dec 07 2018 the test work program was carried out on those five ore samples obtained from the copperporphyry orebodies total of 38 bond work index tests including duplicates were done standard bond ball mill test procedure were carried out on

Dec 07 2018 the test work program was carried out on those five ore samples obtained from the copperporphyry orebodies total of 38 bond work index tests including duplicates were done standard bond ball mill test procedure were carried out on

Where wioactis the actual operating bond work index kwht w is the specific energy input kwht p80 is the 80 passing size of product m and f80 is the 80 passing size of circuit feed m 2 calculate the standard circuit bond work index wistd for

Grinding equations in roller mills pdf 4ft standard cone ball mill capacity calculation 4ft standard cone crusher we are a largescale manufacturer specializing in producing various mining machines including different types of sand and gravel equipment milling equipment mineral processing equipment and building materials equipment

3 standard bond tests the bonds standard ball mill is used to determine the work index value of differ ent samples the bond work index is defined as the kilowatthours per short ton required to break from infinite size to a product size of 80 passing 100 m if the breakage

Ball mill sizing with bond method work index base a simple yet practical alternative for the standard bond methodkeywords work index bond method kinetic grinding test grindability ball mill introduction the standard bond 1952 1961 method is widely used in the course of design selection scale up energy email customersinoftmcom

Procedure for determination of ball bond work index in the 20090101a 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

May 01 2021 a bond work index mill ball charge and closing screen product size distributions for grinding crystalline grains int j miner process 165 2017 pp 8 14 101016jminpro201705011

The bond index conforming rod charge consists of 6 rods of 125 diameter and 21 length 2 rods of 175 diameter and 21 length 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

Dec 12 2016 ball mill power calculation example a wet grinding ball mill in closed circuit is to be fed 100 tph of a material with a work index of 15 and a size inquire now ball mill parameter selection amp calculationpower aug 30 2019 1 calculation of ball mill capacity the production capacity of the ball mill is determined by the

Comminution circuits featured projects antapaccay southern peru 20092013 108000 tpd 80000 tpd predictions of mill throughput from a porphyry copper open pit based on comminution test results of 22 composites and the available motor power of a standard sag millball mill circuit consisting of one 40 ft dia x 22 ft egl sag mill rated at 24 mw gmd and two ball mills each 26

For the circuit design a bo nd ball mill work index of 181kwh t was used with design contingency to increase to a maximum of 191kwht design comminution data is summarised in table 4

A comparison of sag mill power models cone allowance results in a 148 kw of power generated in the cone for a total of 3113 kw power draw at the mill shell the measured power is 3190 kw so the modified model predicts low by 78 kw or 2

The work index wi was defined by f bond as the specific energy kwhton required to reduce a using a novel ring mill a laboratory ball mill a labora read more the effect of processing parameters on energy consumption of ball

Jan 01 2013 to calculate the bond work index wi in a standard laboratory scale rodmill bond derived the following equation 1 w i 62 p i 023 g i 0625 10 p 10 f kw h sh t where f is 80 passing size of original feed p is 80 passing size of circuit product and pi is the testsieve size in m 1 the standard procedure to determine all bond

How to calculate mill bond or work index 2015729grindability 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 follows302 1 10 80 10 80 441 g p f w i bg i u 4 in designing and optimizing a milling circuit using bond

Laboratory ball mill for bond work index procedure and method xmgb work index ball mill find complete details about laboratory ball mill for bond work index procedure and method xmgb work index ball milllab ball millxmbg work index ball millball grinding mill from mine mill supplier or manufacturerganzhou gelin mining machinery co ltd

Infinite size to a p80 size of 100 m the bond grindability test is conducted to determine the bond work index wi via standard bond ball mill which having the dimensions d l305 305 mm and a speed revolution of 70 min1 4 5 hardness values of crystalline minerals has strongly

Bond index ball mill rod mill bt 100 xl retsch 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 the rod mill work index rwi is used for particle size determination in a size range from 25 mm down to 21 mm whereas ball mill work

Standard bond ball mill grindability test methodprocedure here 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

Mill ball mill closed circuit crushing to 16 mm open circuit 8 dia rod mill to 1 mm closed circuit 8 dia ball mill to p80 um the ore test work index circuit operating work index 9 the standard bond circuit coarse ore bins fine ore bins screen crushing screen classification rod mill ball mill this is the reference basis for all work

Gtek bond ball mill work index is used for determine the grindability of materials and help to choose the most suitable type and model of grinding equipment ask for quote donwload find more details in the options below

Mar 11 2020 bond ball mill work index test standard pdf 1 introduction a 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 2006this index is widely used in the mineral industry for comparing the resistance of different materials to ball milling for estimating the

Ball mill wio bwio 86 circuit wio owio 146 bond ball mill work index bwi kwht 134 bond rod mill work index rwi kwht 181 table 1 example of agsag ball mill circuit wio calculations 1 2 abstract optimum use of power in grinding both in terms of grinding efficiency and use of installed capital can have a large effect on

Bond ball mill work index database jktech the 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

Agsag mills 6 ft x 2 ft crushers jaw cone and roll mills rod ball and pebble 12 in x 12 in to 30 in x 60 in available tests sagdesign starkey bond work indices abrasion work index ai ball mill work index wib rod mill work index wir levin work index

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 8 kg of material crushed to nominally minus 10 mm is preferred jktech would stage crush the sample to minus 335 mm as required for the bond ball mill work index test feed

The bond work index test obtained high work index 5260 kwht and consumed power 1172 kwht to grind one ton of low grade iron ore and this attributed to the high concentration and hardness of

The above confirms that the design bwi for the primary ball mill is between 15 kwht and 182 kwht as will be shown later for sizing the primary mill motor the bond method is used the design bond work indices for the primary and secondary ball mills are 165 kwht and 205 kwht respectively

How to calculate mills and crushers power requirement starting inertia in power requirements in crusher ball mills ball mill designpower calculation the basic parameters used in ball mill design power calculations rod mill or any tumbling mill sizing are material to be ground characteristics bond work index bulk density specific density desired mill tonnage capacity dtph operating solids or

The ball mill discharge product was 33585 m for lead ore 74037 m for quartz and 78278 m for granite using bond energy method 514kwht was required to grind 1000kg of test ore to 80 passing sieve size of 100 m keywords discharge feed particle size work index samples

Home iron ore plant work index for iron ball mill 2 grinding machines 21 ball mill 22 rod mill photos of ball mill in cement plants cms crusher machine relation between frequency and mesh size in ball mill machine dressing index in ball mill randome posting hassan green quarry photos

How to process crushed ore from rod mill 4ft standard cone mill grinding the inside of the mill is lined with lifting plates to lift the material inside the mill where it then falls off the plates onto the rest of the ore chargeag mills are primarily used at gold copper and platinum mines with applications also in the lead zinc silver

Apr 01 2001 it has proven its ability to compare bond and spi methods in rating sag and ball mill capacities and hence to compare the limitations of each more on bond and spi the value of using the bond work index and spi at kinross remote kubaka gold project in russia was reported by john starkey of starkey amp associates as the temperature in

Shahsavari procedure for determination of bond ball work the grindability experiments was carried out on the four typical index in the commercial operations min eng 22 2009 104106 samples of copper leadzinc manganese and iron ore in specified 13 l tavares r carvalho j guerrero simulating the bond rodmill grindability

Hard gold ores with average bond ball mill work indices bwi of 151 and 166 kwht bond rod mill work indices rwi of 228 and 242 kwht and jk axb values of 279 and 255 the circuit is comprised of five 746 kw cone crushers four 24 m diameter d x 165 m lengthl 55 mw hpgrs and four 79

Bond work asindex ball mill musikschule bad the 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 indexthe test is a lockedcycle test where ground product is removed from test cycles and replaced by fresh feedthe test much achieve a steadystate before completion

One is the hardgrove grindability index and the other the bond work index the hardgrove index is determined using the astm method d 40971 it involves grinding 50g of the material eg coal of specified size 1630 mesh cut in a specified ballandrace mill for 60 revolutions

Ball mill bond work indeand for limestone ball mill work index sand limestone grinding media ball mill wikipedia the ball mill is a key piece of equipment for grinding crushed materials and it is widely used in production lines for powders such as cement silicates refractory material fertilizer glass ceramics etc as well as for ore dressing of both ferrous and

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