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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 µm If the breakage
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A quick method for the Bond work index approximate value determination which is based on the first order grinding kinetics is presented in this paper due to the difficulties of the standard
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a simple yet practical alternative for the standard Bond method Keywords 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
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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
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Outotec Mergan method is faster than the Bond ball mill test and requires less sample material However the Mergan method gives grinding energy consumption which can be used to calculate Mergan work index but this Mergan work index differs from the Bond work index
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Bond Ball Mill Index Test JKTech 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
WhatsApp rod mill Work Index test for these purposes Chose a o closing screen for the ball mill test one standard square root of 2 series mesh size coarser than the plant ball mill circuit P80 If between standard mesh sizes the finer of the chose two Results of Bond ball mill tests conducted with closing
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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
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Numerically the work index is the energy required in kwht to reduce a given material from theoretically infinite feed size to 80 passing 100 micronshe work index of a particular material is determined in the laboratory by conducting the standard bond grindability test bond developed separate tests for the rod mill and the ball mill
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Outotec Mergan method is faster than the Bond ball mill test and requires less sample material However the Mergan method gives grinding energy consumption which can be used to calculate Mergan work index but this Mergan work index differs from the Bond work index Therefore it is needed to analyze if the Mergan work index correlates
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A clear definition of the required crushing capacities and the desired product quality can be precisely determined by using the Bond Index test methods Using the Bond Index test procedures it is possible to calculate crushing abrasion behavior of mineral samples This knowledge is essential to define the required ball mill layout and
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Bond Work Index Procedure and Method 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 2006 This index is widely used in the mineral industry for comparing the resistance of different materials to ball
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The 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
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The 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
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The work index W i was defined by F Bond as the specific energy kWhton required to reduce a particulate using a novel ring mill a laboratory ball mill a labora tory rod mill and the semi continuous process using the tests which is similar to the Bond test but with the exist ing mill
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Determination of Bond Index of Wasagu Manganese Ore in Kebbi State Nigeria Alabi Oladunni Oyelola Shehu Aliyu Yaro Binta Hassan ABSTRACT In this study the work index of Wasagu Manganese Ore deposit in Kebbi State of Nigeria was determined using the modified Bond''s Method of determining work index also known as Berry and Bruce method
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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 madi and Shsavari 2009 Theoretical basis of quick procedure
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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
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Improved method using less mass compared to the BBMWi Test Development and Initial Validation Use of Work Index Since its introduction in the 1960s the Bond Ball Mill Work Index BBMWi parameter has been extensively used in predicting ball mill power draw
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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 Company Limited
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An improved method using less mass compared to the Bond Ball Mill Work Index test The JK Bond Ball Mill JKBBM test is a locked cycle grindability test conducted using a standard laboratory Bond Ball Mill with the same steel ball charge and material feed size 100 passing 335 mm as the Bond Ball Mill Work Index test
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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
WhatsApp ization data generated from the SMC Test see Annex A and the Bond Ball Mill Test Work Index WiBM GMG 2016a and the Morrell equations and their application see Annex B A worked example is provided in Annex C 5 SCOPE The Morrell method can be used to predict the specific energy of comminution circuits where such circuits include
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Oct 18 2018 · Celtest have the capability to carry out the Bond Work Index BWI Test in accordance with EPRI Report CS3612 FGD Chemistry and Analytical Method Handbook Volume 2 The BWI is used to estimate the required mill power per ton of product
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