FRED C. BOND AND WALTER L. MAXSON,3 63 found, since considerable judgment may be required in correlating such diverse factors as size uf feed, varying circulating loads, stage grinding, presence of natural grain
DetailsOther than the test mineral ore (t), Berry and Bruce [28] modified Bond's method however requires the usage of a reference mineral (r) with a grindability/work index which is known. The test mineral sample, Rayfield-Jos alluvial ferro-columbite tailings, of which the work index is to be determined, was collected from dumps in somewhat fine ...
DetailsA detailed description of Barruecopardo ore can be found in recent publications [32,33]. In the case of Mittersill, an ore description can be found in [34]. The third W ore was Wolframite from the Panasqueira Mine (Portugal), and a detailed de‐ scription of this ore can be found in [35].
DetailsThe work index Wi can be determined from plant operations and from laboratory ball mill grindability, rod mill grindability, and impact crushing tests. The laboratory test results …
DetailsBond work index is an index to evaluate the difficulty of ore grinding. The theoretical basis of Bond work index to measure ore grindability is Bond's ore crushing crack theory [24,25,26]. According to the standard Bond test requirements, the bond work index test of raw materials and pre-enriched adopted a Φ305 × 305 mm standard work …
DetailsThe Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. Its value constitutes ore characteristic and is used for industrial ...
DetailsIt is a well-known fact that the value of the Bond work index (wi) for a given ore varies along with the grinding size. In this study, a variability bysis is carried out with the Bond standard ...
DetailsWork index, kW.h/st ore Iron ore Minus 48 Minus 65 Minus 100 _____ mesh mesh mesh Michigan magnetite: As-received ..... .16.36 15.08 14.74 ... Grindability and Work Index of Iron Ores Average Grindability, Work index,f Decrease Iron ore microwave g per mill kW~h/st ore in work ...
DetailsIn this study, a process of magnetizing roasting followed by low-intensity magnetic separation (MR-LMS), which is used to separate and recover iron from a low-grade carbonate-bearing iron ore ...
DetailsThe present investigation involves the identify the physical properties of three different types of iron ores by using Bond ball mill. The result shows that the maximum Bond work …
DetailsSamples of Itakpe Iron Ore waste dump (tailings) were collected using random sampling method from different locations at the tailings dump sites of National Iron Ore Mining Company (NIOMCO) in ...
DetailsThe grindability and abrasive properties of a representative cross-section of South African coals have been determined using the Hardgrove grindability machine2 and an abrasiveness tester described by Yancey, Geer and Price3. An attempt has also been made to relate the grindability and abrasive pro
DetailsFor design purposes, you need an estimation or prediction of your SAG Mill's tonnage; well, there are 3 ways to generate good rock "ore" hardness testing data for SAG and ball mill circuit grindability …
DetailsIron ore samples Iron ore was taken from Joda mines, Keonjhar (India) for this work. The hematite used in this study was a naturally occurring hematite ore averaging iron content of 62% and a density of 4.63 gm/cm3.
DetailsThe test requires at least 10 particles of -75 +50 mm ore, however for more representative results it is recommended that over 20 particles are tested. ... Bond Ball Mill Grindability Test. The Bond Ball Mill Work Index (BBWi) test is carried out in a standardised ball mill with a pre-defined media and ore charge. The Work Index calculated from ...
DetailsGrindability is normally measured by determining the number of revolutions in a pulverizer that are required to achieve a given size reduction. This is an indirect measure of the amount of work required for that size reduction. Grindability increases slowly to a maximum at ∼90% carbon and decreases rapidly beyond this point.
DetailsSection snippets Iron ore samples. Iron ore was taken from Joda mines, Keonjhar (India) for this work. The hematite used in this study was a naturally occurring hematite ore averaging iron content of 62% and a density of 4.63 gm/cm 3.The sample contained alumina and silica of 4.65% and 2.56%, respectively.
DetailsFrom the grindability trials, the rod mill work index of iron ore material may be reduced by up to 46% after 2 minutes of microwave treatment in a 1000 kW multimode microwave unit.
DetailsGrindability of granite and Iron‐ore was investigated in this work. Samples were collected from Julius Berger Quarry and National Iron‐Ore Mining Company (NIOMCO), Itakpe.
DetailsSemantic Scholar extracted view of "Determination of grindability and work index of Itakpe iron ore." by O. Ojo et al. Skip to search form Skip to main content ... @article{Ojo2000DeterminationOG, title={Determination of grindability and work index of Itakpe iron ore.}, author={Olatunji Oladimeji Ojo and B. M. Olaleye}, journal={Global …
DetailsBond's work index is one of the mostly widely used metrics of mineral grindability. In spite of its ubiquity, users are often not aware of the nuances of the work index family: what …
DetailsIt is a well-known fact that the value of the Bond work index ( w) for a given ore varies along with the grinding size. In this study, a variability bysis is carried out with the Bond …
DetailsThe pulsed power is a potential means for energy saving and presents an alternative to the conventional mechanical communication for minerals. The effect of magnetic pulse treatment on grindability of a magnetite ore was investigated by grindability tests. The results of the investigation show that the pulsed treatment has …
DetailsThree iron ore mixtures with different grindability index (low, medium, and high) were used in order to verify the influence in the operational parameters such as production rate, discharge density, and pump pressure. Through Design of Experiments (DOE), nine experiments over each iron ore mixture were done, varying the minimum and maximum ...
DetailsGrindability and Work Index of Iron Ores Average Grindability, Work index,f Decrease Iron ore microwave g per mill kW~h/st ore in work temperature, revolution index, pct Michigan magnetite: As-received ..... - 1.41 14.74 21.4 Microwaved ..... 840 1.89 11.59 Martitic hematite: ...
DetailsGrindability of granite and Iron-ore was investigated in this work. Samples were collected from Julius Berger Quarry and National Iron-Ore Mining Company (NIOMCO), Itakpe. Particle size distribution of the samples by means of sieve shaker and grindability of samples were also determined. The results obtained show that weight …
DetailsComminution, grindability, grinding, SAG mill, AG mill, milling, HPGR, work index, pilot plant INTRODUCTION The resistance of ore samples to breakage (or hardness) is measured through grindability testing. Several grindability tests have been developed over the years for different applications and each test has its own strengths and …
DetailsStandard Bond grindability tests showed that microwave heating reduced the work index of iron ores by 9.9 to 23.7 pct. Preliminary studies using a continuous feed belt in a …
DetailsThis Table of Ball Mill Bond Work Index of Minerals is a summary as tested on 'around the world sample'. You can find the SG of each mineral samples on the other table.
DetailsThe Bureau of Mines, U.S. Department of the Interior, has conducted studies to utilize rapid microwave heating to stress fracture ore samples. Iron ores containing hematite, magnetite, and goethite were subjected to microwave energy in batch operations at 3 kW and heated to average temperatures between 840° and 940° C. Scanning electron microscope …
DetailsThe results obtained show that weight retained varies from 36.71 g to 183.1 g for granite while that of iron-ore vary from 9.65 g to 87.78 g. In addition, it was observed that granite and iron-ore have grindability values of 0.061 g/rev and 0.926 g/rev respectively. This confirmed that granite requires more energy to be grinded.
DetailsThis work is licensed under the creative commons Attribution 4.0 International license. Main Article Content Determination of grindability and work index of Itakpe iron ore.
DetailsThe work index of Muro iron ore was determined using the modified Bond's method also known as Berry and Bruce method. This study used iron ore obtained from Muro town, a community in Toto LGA ...
Details1.. IntroductionA 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 …
DetailsThe work index of Muro iron ore was determined using the modified Bond's method also known as Berry and Bruce method. This study used iron ore obtained from Muro town, a community in Toto LGA ...
DetailsThe standard work index Wi100 values calculated from Eq. (9) for each ore at each mesh size are included in Table I. Comparison for each ore shows a reasonable agreement among the tests made at various mesh sizes, and indicates that Eq. ... and the rod mill grindability work index at any product size P is found from:
DetailsBond's work index is one of the mostly widely used metrics of mineral grindability. In spite of its ubiquity, users are often not aware of the nuances of the work index family: what are its strengths and weaknesses. Moreover, the operating work index frequently gets confused for a specific energy (SEC) consumption in documents such
DetailsThis 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 …
DetailsPE series jaw crusher is usually used as primary crusher in quarry production lines, mineral ore crushing plants and powder making plants.
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