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The 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 ...
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In this study, the Bond work index of Birnin-Gwari iron ore in northern Nigeria is determined using modified Bond's method using 'reference …
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determination of the work index of BirninGwari iron ore in Nigeria. - A reference ore is ground for a certain time period and the power consumption recorded. An identical weight of the test ore is then ground for a length of time such that the power consumed is identical with that of the reference ore. Equation 1 gives the work index of the ...
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The results showed that the ore is hematitic ore with Goethite and quartz minerals. The ore is low grade containing 41.41 % Fe2O3 and 50.88 SiO2. The 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 ...
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The work index of reference minerals; marble and granite were used to calculate the work index of iron ore. The value of 28.66 Kwh/short ton and 24.92 Kwh/short ton were obtained. ... Determination of Bond index of Birnin- Gwari Iron Ore in Nigeria HTML Download as PDF (Size: 109KB), PP. 635-642 DOI: 10.4236/jmmce.2010.97045 ...
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Based on the defined first-order grinding kinetics in the Bond ball mill, a procedure has been developed for the rapid determination of the work index (Wi) by means of just two …
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Rapid Determination of Bond Rod-mill Work Index - Free download as PDF File (.pdf), Text File (.txt) or read online for free. The document describes a new method for rapidly determining the Bond rod-mill work index through modeling grinding kinetics and mass balance equations. Experiments were conducted grinding four ore samples in a rod mill with three test sieves to …
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Rapid determination of Bond rod-mill work index by … In this paper, iron ore sample from the Chadormalu was investigated to determine some comminution properties. Chadormalu deposit is one of the largest iron ore mine in Iran, which is located in Yazd province. ... The objective of this study was to conduct a rapid determination of Bond work ...
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The objective of this study was to conduct a rapid determination of Bond work index by considering grinding kinetics of the particles in standard Bond rod-mill as well as size-mass balance equations in the mill. ... a material generated from mechanical degradation of coke during handling which is used as solid combustible in iron ore sintering ...
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Bond work index of Birnin- Gwari iron ore in northern Nigeria is determined using modified Bond's method using 'reference ore'. Samples of iron ore were sourced using random method,
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Bond index is useful in designing of grinding system in mineral processing. In this study, the Bond work index of Birnin-Gwari iron ore in northern Nigeria is determined using modified Bond's ...
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Bond index is useful in designing of grinding system in mineral processing. In this study, the Bond work index of Birnin- Gwari iron ore in northern Nigeria is determined using modified Bond's method using 'reference ore'. Samples of iron ore were sourced using random method, reference minerals; marble and granite of known weight and iron ore of known weight were ground using …
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Olatunji and Durojaye (2010) adopted the comparative grindability test for the determination of the work index of Birnin-Gwari iron ore in Nigeria. A reference ore is ground for a certain time …
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The recommendations are given for selecting the Bond mill revolutions in the first milling cycle for apatite–nepheline, copper–nickel and iron ore for the sieve size 106 μm.
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The grindability of an ore in the process of mineral dressing can be determined by use of the Bond work index (W i). This index is determined on a laboratory-scale using a Bond …
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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. ... sulphured ore with high iron content and ore D (31.5% Si ...
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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 ...
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The determination of work index of Enyigba Lead Ore, Ebony State using the modified bond energy (Berry & Bruce) method was investigated. The test sample was obtained from Enyigba village in Ebonyi ...
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The work index of Muro iron ore was determined using the modified Bond's method also known as Berry and Bruce method. This study used iron ore obtained from Muro town, a community in …
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for beneficiation of low-grade iron ore consisting of goethite T. Umadevi*, K ... Bond work index (Standard FC Bond work index). The ... the test sieve used for the determination of the Bond work index was 75 µm for close size parameter. The ball mill size was 305 × 305 mm, the speed was 70 rpm, and the ball load was 285 balls with weight of ...
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Bond work index of Birnin- Gwari iron ore in northern Nigeria is determined using modified Bond's method using 'reference ore'. Samples of iron ore were sourced using random method, ... The determination of work index using modified Bond's method can be compared to method of determining it by Berry and Bruce (1966). This method requires ...
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To calculate Bond rod-mill work indices, the four samples were screened and the particle size distributions plotted in Fig. 2.The plot was used to find F 80 of the samples for calculations. Fig. 3, Fig. 4 show the grinding kinetics of Pb, Cu, Fe, and Mn ores in the Bond rod-mill in different test-sieves. The slopes of all lines in the figures are equal to the k value of Eq.
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The work index of Muro iron ore was determined using the modified Bond's method also known as Berry and Bruce method. This study used iron ore obtained from Muro town, a community in Toto LGA, Nasarawa state as the test ore. Marble and Granite which was separately used as the reference ores were obtained from Muro environs. 100 g each of the …
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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 milling, for estimating the energy required ...
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In this study, the Bond work index of Birnin-Gwari iron ore in northern Nigeria is determined using modified Bond's method using 'reference ore'.
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Bond Tests. The most widely used parameter to measure ore hardness is the Bond work index Wi.Calculations involving Bond's work index are generally divided into steps with a different Wi determination for each size class. The low energy crushing work index laboratory test is conducted on ore specimens larger than 50 mm, determining the crushing work index (Wi C, …
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The ore resistance to grinding and energy consumption can be expressed using the work index and Bond's Third Theory. The Bond Third Theory method is widely used in the design of the grinding cycle, selection of grinding equipment, determination of required grinding power, and performance evaluation of the process. ... This paper describes the ...
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TL;DR: In this paper, the authors used the calculated retention time of the iron ores as a standard grinding reference time to the laboratory ball mill for optimizing the grinding time of each ore, and obtained a desired P80 (150μm) with an acceptable range of hematite liberation (> 75%) after reducing 6min from the total retention time taken in the Bond ball mill.
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Download scientific diagram | X-ray diffraction (XRD) pattern of iron sample. from publication: Characterization and Bond Work Index Determination of Low Grade Sudanese iron Ore: a case study | In ...
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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. ... TRUMIC M., 2012, Determination of the Bond work index on samples of non-standard size, International Journal of ...
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