Singh, Nitesh Kumar and Mohanta, M K and Rath, R K (2012) Determination of Shatter Index, Tumbler Index and Bond work Index of Limestone. Training Report (TR). CSIR -NML, Jamshedpur. (Unpublished) PDF Restricted to Repository staff only 518Kb: Abstract. The fragility of ore depends upon its strength. In a crushed product or mining product, …
It is important to establish a relationship between the Hardgrove grindability index (HGI) and the Bond work index (W i) or the Bond grindability (G bg). It has been demonstrated by many researchers (Bond and Maxson, 1943, Haese et al., 1975, McIntyre and ... For each limestone, the samples with three different volumetric powder fillings …
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 ...
Among all seven samples collected from the different faces of quarry, Bond work index of limestone Face-4A results less than 20kwh/t, remaining 6 samples are marked as hard rock because of high ...
The computation of a Bond ball mill work index was empirically calibrated by Fred Bond using a short ton basis. The modern (metric tonne) basis is the following equation: Derived values composed from Wi BM results. Morrell Mib value is calculated for a sample if the following are available: umClosing, F80, P80, gpr.
The test determines the Bond Impact Work Index which is used with Bond's Third Theory of Comminution to calculate net power requirements when sizing crushers*. It is also used to determine the …
The Bond work index of limestone and andesite mixtures (naslov ne postoji na srpskom) Todorović Dejan, Bartulović Zoran, Jovanović Vladimir, Ivošević Branislav. Institut za tehnologiju nuklearnih i drugih mineralnih sirovina - ITNMS, Beograd, Srbija ...
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'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). The Allis-Chalmers company (now ) collected a great deal of operating and laboratory data during the 1930s
4.1.1. Mixture of 75–25% limestone–corundum. The first mixture contains 75% limestone and 25% corundum in weight, the results of these measurements can be seen in Fig. 1.. It is observed that in the first and second grinding cycles the initial 75% limestone content increased significantly to the rate of 86–89%.
Friability of rocks and ores can be determined by brittleness tests. A test apparatus to determine friability value has been designed to suit limestone strength characteristics used in cement production.The friability values of barite, marble, limestone and bauxite have been determined and compared with the corresponding Bond work …
Relationship between Bond's work index (W i) and uniformity constant (n) of grinding kinetics on Tower mill milling limestone. ... This mill was filled with 64 kg of limestone ore sizing −5+0 mm, and the rotation of the screw was settled at 85 rpm. Samples for particle size distribution analysis and evaluation of related parameters were …
The Bond work indices of the admixtures containing a softer component (kaolin) were found to be greater than the weighted average of the work indices of the individual components in the...
Bond work index value of these components mixtures is greater than the Bond work in-dex of harder components, clinker. Oner (2000) have conducted a research of clinker and blast furnace slag mixture Bond Work Index in different mass propor-tions. He found out that these values are always lower than the Bond Index obtained
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 ...
The high work index of limestone could be due to its strong interlocking matrix and micro-crystalline structure, whereas marble has larger crystals. The friability …
The bonding index for iron ore, low grade and high grade limestone and pozzolan were calculated to be 14.75, 11.61, 11.87 and 10.80 Kwh/t, respectively. In order to investigate the relationship ...
The energy required for crushing and grinding is presented by the Bond work index and is determined by means of Bond grindability test. This paper presents the experimental results of the Bond work index values obtained by the standard method on limestone and andesite samples, as well as composite samples… Expand
the different faces of quarry, Bond work index of limestone Face-4A results less than 20kwh/t, remaining 6 samples are marked as hard rock because of high energy consumption and low grindability rate.
No. 3-4, 2017 Mining & Metallurgy Engineering Bor26 It can be seen in Figures 4,5 and 6 that during the execution of all Bond tests on samples with varying mass portion of mix-
Fig. 4. A test result of a limestone sample on KM-5 Tower mill. 85 S. Nitta et al. / Int. J. Miner. Process. 66 (2002) 79–87 3. Validation of the relationship between Wi and n through experiment 3.1. Measurement of the Bond's work index Wi In Japan, the Bond's work index (Wi) measurement abides, basically, by the JIS M-4002 regulations.
In the oolitic limestone experiment, three-dimensional source location is demonstrated. The best-matched point search method successfully determines the lo …
The grindability of an ore in the process of mineral dressing can be determined by use of the Bond work index (Wi). This index is determined on a laboratory-scale using a Bond ball-mill and by ...
This paper presents the experimental results of the Bond work index values obtained by the standard method on limestone and andesite samples, as well as composite samples made up from these ore in …
By Bond grinding, the Bond Work Index of the limestone sample was 14.45 kWh/t. During the determination of the Hardgrove Grindability Index (HGI), 50–50 g limestone samples from the 0.63–1.25 mm and 50–100 μm particle size fractions were ground to 60 mill speeds, and then the ground material was divided into 0.071 mm sieve …
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 …
This paper presents the experimental results of the Bond work index values ob- tained by the standard method on limestone and andesite samples, as well as composite samples …
The friability values of barite, marble, limestone and bauxite have been determined and compared with the corresponding Bond work index (Wi) and grindability index (G) of these materials.
International Journal of Mineral Processing, 27 ( 1989} 125-132 125 Elsevier Science Publishers B.V., Amsterdam -- Printed in The Netherlands A Procedure for Rapid Determination of the Bond Work Index N. MAGDALINOVIC University of Belgrade, Technical Faculty at Bor, 19210 Bor (Yugoslavia) (Received November 24, 1987; …
HGI test results were compared with the PSD results. A new method for the prediction of HGI of limestone samples from both of the quarries (Quarry-1 and Quarry-2) was proposed. Significant correlation (R 2 = 0.84) was obtained with D 90 size parameter. In terms of grinding energy calculations, Bond Work Index (BWI) was taken into …
Deniz (2004) [22], presented the relationship between Bond's grindability and breakage parameters of grinding kinetic. He conducted grindability test on 6 limestone samples taken from different regions of Turkey and found the following relation between breakage parameter (S i, a T, β and γ) with correlation coefficients of 0.96, 0.92, 0.90 …
Figure 5 The limestone content in circulating load during the standard Bond test on samples with the composition limestone : andesite = 50: 50 - "The Bond work index of limestone and andesite mixtures"
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