The Bond work index (Bond, 1960) is based on Bond’s law, which states that the energy consumed is proportional to the 1.5 power of particle size rather than the square of Rittinger’s law. Accordingly, the energy consumed in reducing the particle size from x F
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Work index is the relation between the SEC and the amount of breakage in an ore. The most common form of this relationship is given as Equation 1, and is often referred to as
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2021.6.17 Study of Bond Work Index and Grindability Index on Various Critical 1. Introduction Metal Ores. Metals 2021, 11, 970. doi/10.3390/met11060970
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2007.12.1 The present paper shows that the impact work index actually reflects two properties that characterize material fracture: the particle fracture energy and the
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2017.1.1 The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test.
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2021.10.28 They evaluated different rock mechanical tests including UCS test, PLS test, BTS test, hardness test, and grindability test methods such as Bond ball mill work
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Bond'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...
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The crushing work index (CWi), estimated on the basis of the twinpendulum test, has been proposed by Fred Bond and accumulates a long track record in predicting the
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2021.5.1 The Bond work index (BWI) is a well-known method used when selecting comminution equipment, to evaluate the grinding efficiency and to calculate the required
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The Bond Work Index (Wi) is a common technique for the estimation of hardness and energy requirement for comminution using ball mills. However, this technique is time-consuming (close to 5 hours ...
Read More2015.11.22 The Bond rod mill work index (Wi RM, or RWi) conducted from a feed size of approximately 10 mm to a product size on the order of 1 mm. The Bond crushing (impact) work index (Wi C, CWi, LEIT or IWi)
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2021.6.17 It 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 grindability tests on
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2022.11.11 The work index equation for a ball mill test was generated by Fred Bond to empirically predict the operating work index of an industrial ball mill (8 ft dia by 8 ft effective grinding length ...
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2009.1.1 Section snippets Grinding kinetics in the Bond ball mill. Tests of grinding kinetics in the Bond ball mill (Fig. 1, Fig. 2) has shown that over a shorter grinding period, the process follows the law of first order kinetics R = R 0 e-kt where R = test-sieve oversize at the time (t); R 0 = test sieve at the beginning of grinding (t = 0); k: grinding rate
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2017.1.1 work index approximate value is exactly the same as in the first two grinding cycles of. Prepare a sample, the same as for the standard Bond test (grind to 100%. -3.327 mm). Determine the starting ...
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Bond’s work index model of quantifying mineral grindability was born out of the desire for a better way of scaling up laboratory grindability test results to industrial-scale grinding mills (Lynch Rowland, 2005). ... given as Equation 1, and is often referred to as “Bond’s equation” or “Bond’s law.” ...
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2012.12.1 In this research work, a high grade copper sample from Miduk copper concentrator was prepared, and its work index values were experimentally estimated, using different control screens, 600, 425 ...
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The Bond Work Index is material specific and is obtained from laboratory crushing tests on the feed material. Hard and brittle materials have a work index in the range 4 × 10 4 − 8 × 10 4 J/kg. Bond’s law holds reasonably well for a variety of materials undergoing coarse, medium and fine size reduction. (Eq. 14.3a) can also be reduced to
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2020.11.1 The Bond work index of the ore has been determined. (This result closely matches the reference value for hematite given in Table 1.) It remains to compute the work required for the second set of conditions, The energy required to grind two tons of the ore in question is. References • ANDERSON, C., DUNNE, R., and UHRIE, J. (Eds.) (2014).
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2007.12.1 The traditional Bond work index proposed by F.C. Bond over 60 years ago is still today a useful tool for characterizing material crushability and grindability in the minerals industry.
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2007.12.1 Bond (1947) defined the impact energy per unit of thickness C B by dividing the impact energy by the thickness of each particle w, so that (1) C B = 117 (1-cos ϕ) / w where ϕ is the angle, w is given in mm and C B in J/mm. From this and the material specific gravity ρ s (in g/cm 3) Bond proposed to estimate the crushing work index using
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2023.7.20 In the expression, W is the energy consumed by crushing unit mass material; F and P are the particle size of the material before and after crushing (the sieving particle size corresponding to the yield under the sieve of 80%, μm). In a given crushing process, the work index calculated according to the W, F, and P values of the actual
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2005.8.5 Determination of work index in a common laboratory mill. Juan M Menendez-Aguado. B. R. Dzioba. A. L. Coello-Valazquez. The Bond work index is one of the most useful and interesting parameters used ...
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2021.5.1 The 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. ... Bond, F.C., 1961. Crushing and grinding calculation part I and II. Brit. Chem. Eng. 6 (6 and 8). 378–385 543–548. Google Scholar. Chandar et al., 2016. R.K ...
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The crushing work index (CWi), estimated on the basis of the twinpendulum test, has been proposed by Fred Bond and accumulates a long track record in predicting the performance of crushing ...
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2020.9.24 Work Index, Work Index Efficiency, Bond Work Index testing 4.INTRODUCTION AND BACKGROUND The Bond method allows for quantification and com-parison of relative energy efficiencies of most industrial comminution circuits. It is an essential tool for managing the important business (cost) of grinding. For early analyses
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2007.12.1 Perhaps the most traditional is the one proposed by F.C. Bond over 60 years ago (Bond, 1947, Bergstrom, 1985), which is still used today for characterizing material crushability in the minerals industry. The Bond crushing work index is a measure of material strength and is determined using a simple twin pendulum apparatus and a
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Contribute to luoruoping/id development by creating an account on GitHub.
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