Processing capacity:207-430t/h
Feeding size:≤20mm
Appliable Materials: cement,refractory material,fertilizer,glass ceramics,copper mine,ore etc. All grindable materials, various metal ores, non-metallic ores, non-flammable and explosive materials
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Ball mill is a horizontal grinding mill and key equipment for grinding materials, widely used in ore flotation processing plant and powder-making production line. According to different materials and discharging methods, there are dry ball mills and wet ball mills for choice. Dry ball mill is mainly for producing mineral powder used in cement, silicate product, new building material, refractory, fertilizer, black and non-ferrous metals and glass ceramic industry; Wet ball mill is a kind of continuous ball mill used in ore beneficiation plant. ...Learn More
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The rod mill work index laboratory test is conducted by grinding an ore sample prepared to 80 passing 127 mm inch the original test being developed in imperial units to a product size of approximately 1 mm in the original and still the standard 14 mesh see chapter 4 for definition of mesh thus determining the rod mill work index
A bond rod mill work index is to be determined in an apparatus with a wave liner the author is aware of four laboratories that offer a rod mill work index test where the lining of the mill is either smooth or smooth with a small number of primitive
Bond rod mill grindability test grinding solutions can carry out bond rod mill work index tests to determine the energy requirements for milling ore in a rod mill the test requires a minimum of 20kg of 125mm material closing screen sizes typically range from 475mm to 212 m abrasion index test
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
The titan bond work index rod mill is onepiece cast construction with integral wave liners of a form described by bond this mill is used to perform the necessary metallurgical testing to determine the grinding characteristics of ores and power requirements for operating productionsize rod mills
Generally bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required power in the current research a simple fast and accurate procedure is introduced to find the rodmill work index based on the conventional bond work index
Jul 30 2020 measuring 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
Bond test wis kwht rod mill ball mill 95 kwht8 9 kwht bond standard circuit work index assume the rod mill work index of 95 applies from the actual rod mill feed sizeof 19300 m although some of this work might ideally be done by crushers to achieve a rod mill f80 of 16000 m to a rod
The bond rod mill work index is used to calculate the power requirement at intermediate size ie from 125mm to about 1mm the test has been mainly used for the design of rod mills or primary ball mills but it can also be used along with the other bond tests bwi and cwi for sag mill design using semiempirical relationship 6 bond low
the bond ball mill work indices determinations gave reasonably reproducible results significant variation was observed in the measurement of the bond rod mill work index on at least one sample tested and large variations in abrasion index and crushing work index were due to variations in the test method across the laboratories
The macperson autogenous grindability test determines the macpherson correlated autogenous work index this can be used in conjunction with the bond rod and ball mill work indices to determine power requirements and to suggest circuit configurations for autogenous grinding ag and semiautogenous grinding sag circuits
Bonds approach consists of determining the ore hardness characteristics or work index wi via standardized laboratory testwork the 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 ai
Jan 01 1992 simulating the calculation of the bond rodmill work index afterthe parameterskl n 1 k and n are obtainedthe mathematical models of simulating the calculation of the bond rodmill work index can be written as followsin the firstcycle where c is the ratio of the circulating loadin the ith cycle i a 2 with the ending conditions 150
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
Rapid determination of bond rodmill work index by modeling the nov 7 2012 generally bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and
The bond work index for rod mill is a special equipment for testing bond rod mill work index simple lab test can choose rod mill by power method or judge the effects of material properties change to the rod milling process or the operation condition of rod mill by using this equipment from 1980s the company developed the equipment and
Generally bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating
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
The bond rod mill work index is used to calculate the power requirement to grind from to about 14 mesh the test has been mainly used for the design of rod mills or primary ball mills but it can also be used along with the other bond tests bwi and cwi for sag mill design
The mill power is 225 watts calculated by 6 fi p nally the product is wet screened to find the size d80 24 rod mill semi continuous process the same mill is used for the semi continuous grinding tests which is similar to the bond test but with the exist ing mill of known power after time the mill product is t
The bond work index equation is indeed a process engineering tool for the ages this bulletin describes its form and basic uses another bulletin will describe how bond used it to prescribe mill power requirements for new projects by measuring the work index of the ore and subsequently how to use it to calculate and compare circuit efficiencies
The macperson autogenous grindability test determines the macpherson correlated autogenous work index this can be used in conjunction with the bond rod and ball mill work indices to determine power requirements and to suggest circuit configurations for autogenous grinding ag and semiautogenous grinding sag circuits
Magdalinovic n trumic m trumic g magdalinovic s trumic m 2012 determination of the bond work index on samples of nonstandard size int j miner process 1141174850 google scholar 13 tavares lm de carvalho rm guerrero jc 2012 simulating the bond rod mill grindability test miner eng 2699101
An error analysis of the bond rod mill work index is performed a first source of error is the representativity of the sample used for the test estim
Rod mill power is dependent on mill capacity and work index mill power increases with increasing rod charge increasing mill speed increasing mill length rowland and kjos 1980 provided an expression to quantify power draw at the pinion shaft per unit mass of rods p m m r 1752 d 033 63 54j r
The crushed feed sample is subject to a grinding by a standard ball mill the bbwi is calculated after achieving a consistent ipp of 28 bond rod work index brwi
Generally bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required power in the current research a simple fast and accurate procedure is introduced to find the rodmill work index based on the conventional bond work index
The titan bond work index rod mill is onepiece cast construction with integral wave liners of a form described by bond this mill is used to perform the necessary metallurgical testing to determine the grinding characteristics of ores and power requirements for operating productionsize rod mills
Jan 01 1992 simulating the calculation of the bond rodmill work index afterthe parameterskl n 1 k and n are obtainedthe mathematical models of simulating the calculation of the bond rodmill work index can be written as followsin the firstcycle where c is the ratio of the circulating loadin the ith cycle i a 2 with the ending conditions 150
Generally bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required power in the current research a simple fast and accurate procedure is introduced to find the rodmill work index based on the conventional bond work index
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
Generally bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating
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
Bond test wis kwht rod mill ball mill 95 kwht8 9 kwht bond standard circuit work index assume the rod mill work index of 95 applies from the actual rod mill feed sizeof 19300 m although some of this work might ideally be done by crushers to achieve a rod mill f80 of 16000 m to a rod
The macperson autogenous grindability test determines the macpherson correlated autogenous work index this can be used in conjunction with the bond rod and ball mill work indices to determine power requirements and to suggest circuit configurations for autogenous grinding ag and semiautogenous grinding sag circuits
In conjunction with the bond ball mill work index they can be used to accurately predict the overall specific energy requirements of circuits containing ag and sag mills ball mills rod mills crushers high pressure grinding rolls hpgr
Rod mill power is dependent on mill capacity and work index mill power increases with increasing rod charge increasing mill speed increasing mill length rowland and kjos 1980 provided an expression to quantify power draw at the pinion shaft per unit mass of rods p m m r 1752 d 033 63 54j r
Testwork bond ball mill work index 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 the test much achieve a steadystate before completion
The model was validated for four materials showing that it can predict the bond rod mill work index with deviations below 10 requiring only 153kg of sample the procedure is demonstrated to
Rod 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
Mar 31 2016 a bond rod mill work index is to be determined in an apparatus with a wave liner the author is aware of four laboratories that offer a rod mill work index test where the lining of the mill is either smooth or smooth with a small number of primitive lifters that do not constitute a wave liner one of the four laboratories is known to be investigating replacing the liner with a
Rod mill work index is used in the sagmillingcom bondbarratt specific energy consumption model the work index is used to calculate the energy requirement to grind rocks in the medium size range from 10 mm 20 mm down to about 2 mm
Jan 01 2013 the bond rodmill work index is used in conjunction with bonds third theory of comminution to merely calculate net energy requirements for sizing rodmills this test was originally developed in the mid 1930s by fc bond though it was altered in succeeding years it has essentially remained unchanged since 1961
The rod mill work index laboratory test is conducted by grinding an ore sample prepared to 80 passing 127 mm inch the original test being developed in imperial units to a product size of approximately 1 mm in the original and still the standard 14 mesh see chapter 4 for definition of mesh thus determining the rod mill work index wir or rwi
Jun 19 2015 here is a list presented in table form of rod mill work index as testedpresented by sme handbook of mineral processing nl weiss editor ny 1985 rapid determination of bond rodmill work index by craig taylor on scribd
The procedure for the shortened method the fact that shortening grinding cycles causes negligible rela tive error the weight of oversize and undersize samples will the procedure for determining the bond rodmill work index be approximately equal to m m2 contrasting with standard based on the shortened method is as follows bond work index method in which the weight of
Jun 06 2015 this grindability test or bond ball mill work index procedure is used to determine the bond work index of minus six mesh or finer feed ore samples these equation application methods are used to process 12 ore samples in a ball mill using a standard ball charge
Bond rod mill grindability test the test determines the bond rod mill work index which is used with bonds third theory of comminution to calculate net power requirements when sizing ball mills various correction factors may have to be applied the test is a closedcircuit dry grindability test performed in a standard rod mill
Jul 30 2020 it is a locked cycle test conducted in closed circuit with a laboratory screen sample requirements a minimum of 20 kg of material crushed to nominally minus 19 mm is preferred jktech would stage crush the sample to minus 125 mm as required for the bond rod mill work index test feed
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