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 (Unpublished) PDF Restricted to Repository staff only 518Kb: Abstract.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, the ...

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 …

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.

The Bond work index that is considered as a research methodology widely used for the estimation of power required to grind the materials. This book highlights the importance of grindability and calculation of energy requirements for the effective production of ultra-fine particle of limestone.

Table 1 The Bond work index values obtained by standard the Bond procedure and values calculated according to the mass fraction of the sample components Test sieve, Wi, Wi calcul., Difference, Sample µm kWh/t kWh/t % 74 13.90 / / Limestone : andesite 105 12.77 / / 100 : 0 150 12.63 / / 74 14.51 14.95 3.02 Limestone : andesite 105 13.91 13.81 ...

Section snippets Apparatus and methods. Traditional Bond ball mill (Ø305 × 305 mm) and Hardgrove mill were used for the measurements.The traditional Hardgrove Grindability Index (HGI) was determined by using the following equation: HGI = 13 + 6.93 m P where m P means the mass of product particles finer 75 μm in grams. From this …

The study is focused on comminuting behavior of limestone and calculation of energy requirements for the effective production of ultra-fine particle up to mesh liberation at …

The initial sample volume is 207 cm3 instead of 700 cm3; accordingly, the test can be performed on 3 kg instead of 10 kg. The procedure involves dry grinding in a closed cycle until a 250% circulating load is reached. The Bond work index is …

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 …

Avg Bond Work Index: kWh/t: kWh/t: kWh/sh.t: kWh/t: kWh/t: kWh/t: kWh/t: Range: No of Tests: Alumina: 17.9: 7-34: 6: Andesite: 20.1: 18.3: 20.1: 19.5: Barite: 6.3: 4.7: 5.2: 5.0: 5.8: 4-9: 7: Basalt: 18.9: 17.1: 18.8: 19.0: 19.0: Bauxite: 9.7: …

The friability values of barite, marble, limestone and bauxite have been determined and compared with the corresponding Bond work index ( Wi) and …

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. Although considered an industry standard, Bond did not fully define that procedure, and therefore significant discrepancies in test results can sometimes be …

The Bond work index is a research methodology, which is widely used for the estimation of power required to grind the materials. ... 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. Index Terms— Ball mill, Bond Work Index ...

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 index (W i) and grindability index (G) of these materials. The …

limestone : andesite = 75 : 25. The Bond work index determination according to the standard Bond's test is done on all these samples with compara-tive sieve size of 74, 105 …

The Bond work index of the mixture is 16.3 kW h/t. Furthermore, the Bond work index was estimated using the Karra algorithm using the first two cycles of the Bond measurement, the value is found to be 14.5 kW h/t. The difference from the standard Bond-work index is 11.0%. 4.1.2.

No. 3-4, 2017 Mining & Metallurgy Engineering Bor24 Figure 2 The limestone content in grinding product during the standard Bond test on samples with the composition limestone : andesite = 50: 50 ...

The Bond work index of limestone and andesite mixtures. by Zoran Bartulovic. 2017, Mining and Metallurgy Engineering Bor. See Full PDF. Download PDF. Create a free …

The derived eqs. 9, 15 and 16 make it possible to abbreviate the Bond test to only two grinding tests. The abbreviated procedure for finding the work index is as follows: (1) The work index is determined from feed crushed to minus 3.327 mm (the same as for the standard Bond test). (2) The feed is screened to determine its size distribution ...

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.

2.2 Bond Ball/Rod Mill Work Index. Bond ball mill work index (BBMWI) test is a standard test used to measure the ball mill work, which is calculated in accordance with the procedure proposed by the Bond [21]. The BBMWI determines how much energy is needed to grind a sample of ore in a ball mill [22].

PDF | On Jan 1, 2017, Dejan Todorović and others published The Bond work index of limestone and andesite mixtures | Find, read and cite all …

The Bond work index that is considered as a research methodology widely used for the estimation of power required to grind the materials. This book highlights the importance of grindability and calculation of energy requirements for the effective production of ultra-fine particle of limestone. Limestone is widely used in the Cement Industries ...

The Bond Work Index (Wi) is a common technique for the estimation of hardness and energy requirement for comminution using ball mills. ... Fine and ultrafine grinding of limestone are frequently ...

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.

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.

The 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 …

The Bond work index is defined as the specific energy required to reduce a particulate material from infinite grain size to a size of 100 microns (Stamboliadis, et al., 2011). Simply put, work ...

Bond's work index one of the most acceptable approach to calculate the grindability index. What is bond index? A bond index is a way of measuring the value of a portion of the bond market.

The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. …