Rod Mill Work Index Table Previous Next 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
Get PriceIndices It is also the Bond ‘design’ Work Index for this circuit To avoid the introduction of any designinefficiency factors in the Bond reference standard circuit assume 8 foot 244 m diameter overflow mills and use a rod mill feed size F80 of 16000 m and a rod mill µ product size of 1000 m
The work index covering grinding in tumbling mills of coarse sizes is labelled M ia The work index covering grinding of fine particles is labelled M ib Morrell 2008 M ia values are provided as a standard output from a SMC Test Morrell 2004a whilst M ib values can be determined using the data generated by a conventional Bond ball mill work index
The 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
Bond Rod Mill Grindability Test The test determines the Bond Rod Mill Work Index which is used with Bond’s 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
The test determines the Bond Rod Mill Work Index which is used with Bond strategically loed to service the growing needs of the exploration and mining bond 26 2339 s rod mill for work index Bond Rod Mill Work Index Equipment Apparatus Review Insurance Bonds All Forms Phone MA 52137 Line Up With Bear Asheboro 20 Index to Advertisers 6
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
Question The Ore Fed To A Rod Mill Has A Bond Work Index Of 175 KWht1 The P80 Of Feed To The Mill Is 425 Cm And The P80 Of The Product From The Mill Is 0185mm Calculate The Work Required To Grind The Ore To The Product Size As Well As The Reduction Ratio
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
Upon obtaining a consistent IPP the undersize product of the final cycle is sized to obtain a work index Bond Ball Work Index BBWi The sample is staged crushed to 100 passing 335 mm
grindability is Bond’s 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
Geostatistics The 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 SPI R value is known not to be an additive parameter however errors introduced by
the 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
Index BWi the Rod Mill Work Index RWi the Crusher Work Index CWi and the Abrasion Index Ai Over the years it has been determined that Efficiency Factors EF1 to EF9 should be applied to
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
Kinetic grinding test approach to estimate the ball mill work index 343 The W i parameter is obtained from Bond’s ball mill grindability test Bond 1961 This test is performed according to the standard Bond procedure which proposed model is presented in Eq
Mill dimensions Ø17m x 06m length Typical throughput 05 35 th depending on ore characteristics and circuit Accurate instrumentation for feed rate charge mass and mill power Incorporation of pebble crusher possible qBall Rod Pebble Pilot Milling Mills of different dimensions ranging from Ø094m x 15m length to Ø 04m SAMPLE PREPARATION
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
Bond rod and ball mill work indices are readily converted to pinion energy for rod and ball mills but not for SAG mills Reproducibility while not studied in this paper is
rod mill work index has not been de ned as yet The ball ﬁ mill work index is con rmed at 16 kWht The operating ﬁ work index though is in the range of 21 kWht to 25 kWht showing high inefﬁ ciency This raises the point that in some cases the Bond EF4 oversize factor calculation is
work index series ball mill rod mill and MacPherson autogenous and pilot plant tests require relatively more weight for a given top size because they are run until a steadystate is achieved which involves replacing the mill charge several times throughout the test The
tory rod mill and the semi continuous process using the same rod mill as described below In all cases the min eral sample is crushed and screened to pass a predeter A New Approach to the Calculation of Work Index and the Potential Energy of a Particulate Material
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 testwork is required to determine these Work Indices and each test requires carefully collected samples of rock that is representative of future mill feed
As in ball mills the power draft of a rod mill is the product of capacity and work index which is the energy required to break a mineral of a given size to the required size The mill power is also increased by increasing the rod charge and the mill speed while the mill power and capacity are both increased with increasing mill length
PDF Rapid determination of Bond rodmill work index by modeling the grinding kinetics Stefano Ordoiza Campanella Generally Bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required power
Bond Rod Mill Grindability Test The test determines the Bond Rod Mill Work Index which is used with Bond’s 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
Their proposed model against the traditional Bond rodmill work index had a standard deviation below 10 The objective of this study was to conduct a rapid determination of Bond work index by considering grinding kinetics of the particles in standard Bond rodmill
Oct 03 2015 · 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
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 micrometers F 80 is the mill circuit feed size in micrometers Rod mill edit