SIMPLIFIED BOND WORK INDEX DETERMINATION By: R. O. Jauregui Kaiser Engineers International, Inc. 300 Lakeside Drive, Oakland, Ca. 94623, USA To design grinding circuits or evaluate their performance the Bond Theory of comrninution is used. Equation (1) is the mathematical statement of the Third Theory: where

MoreNumerically, the work index is the energy required in kwh/t to reduce a given material from theoretically infinite feed size to 80% passing 100 microns. The 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.

MoreDetermination of Bond Work Index of Lucky Cement Limestone Pakistan Niaz Muhammad Shahani, Zhijun Wan, Abdullah Rasheed Qureshi, Muhammad Ali, Naseem Ali Abstract—The Bond work index is a research methodology, which is widely used for the estimation of power required to grind the materials.

MoreA quick procedure with two grinding cycles for the determination of the Bond. work index approximate value is exactly the same as in the first two grinding cycles of. the standard Bond test and ...

MoreDetermination of Bond Work Index of Lucky Cement Limestone Pakistan Niaz Muhammad Shahani, Zhijun Wan, Abdullah Rasheed Qureshi, Muhammad Ali, Naseem Ali Abstract—The Bond work index is a research methodology, which is widely used for the estimation of power required to grind the materials.

MoreJan 01, 2009 1.. 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 the energy required for grinding, and for ball mill ...

MoreA quick method for bond work index approximate value determination 323 This method, by using mathematical algorithms, simulates the Bond test on the basis of the results from the first two milling cycles. Magdalinovic (1989) proposed a shortened method for determining the Bond work index, which includes two milling.

More3.2 Bond work index determination: Table 2.Calculated bulk densities. Revaluation Sample name Bulk density g/cm3 A 2.86 B 2.86 C 2.50 D 2.86 Average 2.77 Table.3 shows the results of bond work index test. It can be concluded that the value of grindability of iron ore in study area is 1.42 g/rev because this value repeated two times ...

Moreand its correlation. As a fast method, the determination of the Bond index from the Hardgrove index (by calculation) is almost matching with measured Bond’s work index. The Bond’s work index of the above rock samples calculated from the Hardgrove index value has shown a

MoreThe bond work index test obtained high work index 52.60 kw.h/t and consumed power 11.72 kw.h/t to grind one ton of low grade iron ore and this attributed to the high concentration and hardness of ...

MoreJul 15, 2013 Bond-Work-Index-Test-Example-Determination by David Michaud April 18, 2018 July 15, 2013 Categories Grinding , Laboratory Procedures , Tools of a Metallurgist Tags Bond's Equation , Grindability , Hardness Post navigation

MoreBond Work Index Determinacion. Bond work index determinacion bond work index determination with a sepor batch ball mill the work index is very important but its determination is time attempts have been made to correlate bond tests to classical batch grinding tests grinding in a closed circuit at 250 circulating load in a bond. Online Chat

MoreAug 01, 2005 The Bond work index is one of the most useful and interesting parameters used in designing grinding equipment. However, it must be obtained under restrained conditions, especially in regards to the Bond standard lab mill. The main objective of this study is to show how this index can be obtained using a Denver ball mill, which is present in most mineral processing laboratories. The

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MoreThe Bond work index, W i , is defined in a Bond ball mill on the samples of standard size −3.327 + 0 mm. In practice, it is possible to find materials of non-standard size that are finer than 3.327 mm. In this work, a procedure for the calculation of

MoreA summary of the Bond’s Work Indexes and Work Input for the different sets are summarized below in Table 7 after making the necessary computations using equations 1 and 2 (sample calculations can be found in the appendix). W = 10Wi (1 √ P 80 − 1 √ F 80) (3) Table 7. Bond’s Work Index and Work Input Values for the different Samples per ...

MoreThe 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 comminution plants designing. Determining the Bond work index value is quite complicated, timeconsuming and requires trained operating personnel and therefore is subjected to errors.

MoreDescripcion del metodo para determinar el indice de trabajo de un mineral.

MoreAug 01, 2005 The Bond work index is one of the most useful and interesting parameters used in designing grinding equipment. However, it must be obtained under restrained conditions, especially in regards to the Bond standard lab mill. The main objective of this study is to show how this index can be obtained using a Denver ball mill, which is present in most mineral processing laboratories. The

MoreDetermination Of Bond Ball Mill Work Index Of Limestone. determination of bond ball mill work index of limestone,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 ...

Morelocked cycle HPi, similar to the Bond Work Index value, where: E = 10 * HPi * (√(1/P 80) - √(1/F 80)) Bond is preferred to the Rittinger equation proposed by others (Klymowsky, 1997) since the use of the square root (0.5 exponent) for the product goes some way in accounting for the additional energy consumed in generating more fine material ...

MoreDetermination of the Bond work index using an ordinary. Read more. A New Model on Breakage Behaviour of A Laboratory Impact Mill. developed by t-family value evaluation and Bond work index approach, and this model is tested. As a result it is determined that the limestone properties are important in crushing and the validity of the model is ...

Morematerial to crushing and grinding is known as Work index., numerically, it is the kilowatt hour per short ton required to reduce the material from theoretically infinite size to 80% passing 100 micron [3], work index determination using modified Bond's method can

MoreTrabajo (Work Index) o Índice de Bond, para molino de bolas. El índice de trabajo, entrega la potencia requerida para moler un material desde un tamaño teóricamente infinito hasta un tamaño tal que pase un 80% los 100 micrones, permitiendo así hacer una buena estimación de

MoreBond Work Index Determinacion. Bond work index determinacion bond work index determination with a sepor batch ball mill the work index is very important but its determination is time attempts have been made to correlate bond tests to classical batch grinding tests grinding in a closed circuit at 250 circulating load in a bond. Online Chat

Moredetermination of grindability using Hardgrove method consists in simple test performance. Especially for these reasons mutual correlation between the results obtained using Hardgrove method and results of tests by Bond. For the calculation of work index Wi from HGI values Bond (1954) proposed by the following formula: 88 . W. i ...

MoreOct 12, 2020 work index molino de bolas laboratorio ترجمة هذه الصفحة. Indice de Trabajo de Bond y su Procedimiento. El índice de trabajo de Bond se ha usado por muchos años para indicar el consumo de energía de un molino de bolas para obtener un tamaño de partícula deseado, usualmente expresada como el pasante bajo una malla especifica como la 150 o la 200.el valor del índice de trabajo ...

MoreThe Bond work index (BWI) is a well-known method used when selecting comminution equipment, to evaluate the grinding efficiency and to calculate the required grinding power.

MoreAs a fast method, the determination of the Bond index from the Hardgrove index (by calculation) is almost matching with measured Bond’s work index. The Bond’s work index of the above rock samples calculated from the Hardgrove index value has shown a variation from 7.7 to 10.3 kWh/sh.t. A correlation is found between the friability value and ...

MoreWork index industrial. W Wi= 10 10 ( 2 −2 √ P80 √ F 80 ) Work index de laboratorio. 44,5 Wi ,= 10 10 p0,83∗G 0,82 (pb ∗ 2 −2 √ P80 √ F80 ) Equipo. Molino de bolas de 12 x 12 pulgadas, tipo de molienda batch o molienda discontinua. Distribución de la carga de bolas para el molino bond: Diametro en Nro.

MoreLa técnica de F.C Bond, para la determinación de Work lndex es usada con frecuencia en este estudio. A pesar de ser muy antigua, su aplicación continua vigente, válida y aceptada. El equipo utilizado fue un molino de modelo BICO con dimensiones de 12" diam x 12" largo. Otras metodologías se presentan como alternativas.

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