Bond Work Index Procedure and Method Attached file is the Bond index test template Bond Work Index Procedure Step by Step While performing the test we gothrough steps 0 1 2 3 4in sequence Fill the data as neededguided by each step The Ball Mill Charge Clean the Ball Mill and
Jaw crusher is the vital equipment in crushing industry.
Jaw crusher is the vital equipment in crushing industry.
Jaw crusher is the vital equipment in crushing industry.
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 per cent circulating load
Click to viewA 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
Click to viewBond Ball Mill Grindability Test The Bond Ball Mill Work Index BBWi test is carried out in a standardised ball mill with a predefined media and ore charge The Work Index calculated from the testing can be used in the design and analysis of ball mill circuits The test requires a minimum of 10kg of sample that has been stagecrushed to 100 passing size of 335 mm
Click to viewThe 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
Click to viewIt is commonly known that one must run the Bond ball mill work index test such you pick a closing mesh to give a P 80 close to desired grind size This is because work index frequently changes as a function of the product size in comminution
Click to viewThe 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
Click to viewThe 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
Click to viewBond Ball Mill Grindability Test The test determines the Bond Ball Mill Work Index which is used with Bond’s Third Theory of Comminution to calculate net power requirements Various correction factors may have to be applied W Wi 10√P – 10√F Where W Net power consumption in kWht Wi Bond work index either Imperial or Metric units
Click to viewThe 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
Click to viewThe 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 crushed 335 mm 6 mesh material at different
Click to viewA 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 for grinding and for ball mill scaleup
Click to viewBond Method For Ball Mill Work Index Test Bond developed a standard laboratory test for the determination of the work index for ball and rod mills in 1952 and modified it in 1961 The standard Bond ball mill grindability test is a closed circuit dry grinding test with a 250 circulating load The standard procedural outline of the test is stated in Bond 1961 The work index for a
Click to viewcan be determined using the data generated by a conventional Bond ball mill work index test M ib is NOT the Bond ball work index M ic and M ih values are also provided as a standard output from a SMC Test Morrell 2009 The general size reduction equation is as follows Morrell 2004b 2 x 1x 4 2 1 xf W i M i x 1 where M i
Click to viewThis Ball Mill can be used for units of time hours minutes or it can be used for any number of revolutions according to the type of grind desired THE TEST The standard Bond test the feed is prepared by stage crushing to pass a 6 US mesh 336 mm screen Eighty per cent 80 of the ore to be tested should pass 6 mesh but be
Click to viewThe 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
Click to viewThe standard Bond ball mill grindability test determines the ore grindability g rev−1 and work index on an ore which gives the ball mill power consumption
Click to viewComparison of Ore Hardness Measurements for Grinding Mill Design for the Tenke Project John Starkey1 to obtain the JK parameters using the JK Drop Weight Test standard 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
Click to viewBond test does not exceed 26 The aim of this study was to develop a new method for assessing the Bond work index in a ball mill BBWI which is based on a first order kinetics present in the Bond ball mill for grinding mineral raw materials Austin et al 1981 Ahmadi and
Click to viewThe Bond ball mill grindability test is run in a laboratory until a circulating load of 250 is developed It provides the Bond Ball Mill Work Index which expresses the resistance of material to
Click to viewBond rod mill work index results from Australian laboratories with smooth liners should not be used in the models The test is a lockedcycle test where ground product is removed from test cycles and replaced by fresh feed The test must achieve a steadystate before completion
Click to vieware 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
Click to viewThe standard Bond grindability test is a closedcycle dry grinding in a standard ball mill 305x305 cm and screening process which is carried out until steady state condition is obtained
Click to viewThe Bond Ball Work Index Test determines the resistance of ore to grinding in a ball mill expressed as a work index kilo Watt hour per ton kWht The work index is then used to calculate the specific energy requirements for sizing ball mills or determining their throughput for a target grind
Click to viewAre You Looking for A Consultant?