Work Index | SpringerLink
The self-grinding work index is an extension of the concept of Bond work index. It generally refers to the work index calculated by using Bond's fracture theory on the principle of ore crushing energy consumption according to the W, F, and P data of a small or semi-industrial or industrial self-grinding test. In this kind of test, McPherson …
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Article Variability Study of Bond Work Index and …
Dry grinding cycles are performed with circulating load in a laboratory rod mill 12" × 24" with a wave‐type lining, running at 46 rpm. The grinding charge consists of six 1.25" diameter and two 1.75" diameter steel rods 21" long, weighing 33.380 kg.
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A meaningful expression between bond work index, grindability index …
A linear relationship between grindability index, G, and friability value was found as given in Eq. (2). The correlation coefficient is very high, at 0.99. (2) G = 0. 171 + 0. 021 (S 20) The relationship between friability value (S 20) and Bond work index (W i) also has a high correlation of 0.97 and this relationship is given in Eq. (3). (3) W ...
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Bond Work Index Procedure and Method
Bond Work Index Procedure and Method. This Grindability Test or Bond Ball Mill Work Index Procedure is used to determine the Bond Work Index of minus six …
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Compare and Understand Rod/Ball/Impact …
The three tests are: The Bond ball mill work index (Wi BM, or BWi) conducted from a feed size of approximately 2 mm to a product size on the order of 100 µm. The Bond rod mill work index (Wi RM, or RWi) …
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crushing index and abrasion index of li ne ore
Table of Bond Work Index by Minerals 911 Metallurgist. WebJun 19, 2015 This Table of Ball Mill Bond Work Index of Minerals is a summary as tested on around the world sample. You can find the SG of each mineral samples on the other table. Source 1. Source 2. Source 3. Source 3. Source 4. Read More
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Determining the Bond Efficiency of industrial grinding …
The metal Bond ball mill is 30.5 cm inside diameter and. 30.5 cm inside length, with rounded corners. It is smooth except for the door hole used for charging. The grinding charge consists of 285 iron or steel balls (43 @ 36.8 mm diameter, 67 @ 29.7 mm diameter, 10 @. 25.4 mm diameter, 71 @ 19.1 mm diameter, and 94 @.
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Bond Rod Mill Work Index Equipment & Apparatus Review
Commentary on the apparatus of the Bond rod mill Work Index by Alex Doll December, 2015 alex.doll@sagmilling The Bond "Third Theory" of comminution was originally divided into three size classes reflecting the varieties of comminution equipment common during the time period when Bond (and his collaborators) were gathering the …
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li ne bond ball mill work feb
Li ne bond ball mill work feb.Coconstruction and working of ball mill.Randpic ball mill wikipedia 2019827 a ball mill is a type of grinder used to grind blend and sometimes for mixing of materials for use in mineral dressing processes paints pyrotechnics ceramics and selective laser sinter. Read More
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Comminution testing
A Bond Ball Mill Work Index may also be used in the simulation and optimisation of existing mill(s) and the associated grinding circuit(s). Sample requirements: A minimum of 8 kg of material crushed to nominally minus 10 mm is preferred. JKTech would stage crush the sample to minus 3.35 mm, as required for the Bond Ball Mill Work Index test feed.
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Determination of the Bond work index on samples of non …
The Bond work index, Wi, 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 the Bond work index is suggested for cases when the Bond grindability test is conducted on ...
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bond grindability index of li ne
· Grindability roller mill li ne. Bond grindability index of li ne . here is the old allischalmers bond work index grindability test procedure the standard feed is prepared by stage crushing to all passing a 6 mesh sieve but finer feed can be used when necessary it is screen analyzed and packed by shaking in a 1000cc graduated cylinder and the ...
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A new methodology to obtain a corrected Bond ball mill work index …
(5): (5) W = 10 ∙ W i ∙ 1 P 80-1 F 80 where: W is the energy input (work) in kilowatt-hours per metric ton; W i is the work index (or Bond work index) in kilowatt-hours per metric ton; and P 80 and F 80 are the 80% product and feed passing sizes, in micrometers. All three comminution theories can be derived from the basic differential Eq.
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Relationship between the Bond work index (w i ) …
Reduced surface area Si-Ti alloy anode materials for Li-ion batteries were prepared by ball milling. Using a high Ti content of 40 atomic % results in low surface area (23 m²/ml) alloy, but also ...
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Bond Work Index
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 …
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Determination of the Bond work index of binary mixtures by different
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 …
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A new approach to the calculation of bond work index for …
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 …
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Prediction of Bond's work index from field measurable rock …
For the evaluation of laboratory and industrial experiments, the work index can be determined as follows: BWI = 44.5 P 1 0.23 × G 0.82 10 P − 10 F where BWI = Bond's work index (kWh/sh. Ton), F = 80% passing size of original feed (μm), P = 80% passing size of circuit product (μm), P1 = Test-sieve size (μm) and G = Net grams of …
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A new approach to the calculation of bond work index for …
A quick method for Bond work index approximate value determination. D. Todorović Maja Trumić L. Andric V. Milošević Milan Trumić. Engineering, Materials Science. 2016. 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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sbm/sbm work index for grinding the li ne.md at main
Contribute to changjiangsx/sbm development by creating an account on GitHub.
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Table of Bond Work Index by Minerals
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: 9.5: 8.8: 9.7: 10.0: …
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Bond Work Index Tests | GSL
The Bond Ball Mill Work Index (BBWi) test is carried out in a standardised ball mill with a pre-defined media and ore charge. The Work Index calculated from the testing can be used in the design and analysis of ball mill circuits. The test requires a minimum of 10kg of sample that has been stage-crushed to passing size of <3.35 mm.
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THE BOND WORK INDEX OF LIMESTONE AND ANDESITE …
THE BOND WORK INDEX OF LIMESTONE AND ANDESITE MIXTURES** Abstract. This paper investigates grinding of mineral mixtures with different grindabilities in the Bond …
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GMSG GUIDELINE: DETERMINING THE BOND …
Bond Work Index testing equipment and methods are also provided. The next steps are: (1) to establish standard reference testing materials and one or more laboratories toserve as bases for reference testing; (2) to establish the accuracy of relative circuit Work Index Efficiency determinations; and (3), to develop and provide a public data base ...
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Bond Work Index (Energy equation)
BOND WORK INDEX. The Bond Work Index is a factor that measures the energy consumed in size reduction operation of the ore. The Bond's Work Index equation is: W=WI* (10/√P80 -10/√F80) where. W= the energy input (Work input) per ton, kwh/metric ton. WI= Work Index= specific energy per ton, kwh/metric ton (characterizes the ore)
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A new approach to the calculation of bond work index for …
Abstract. The Bond work index (BWI) is a well-known method used when selecting comminution equipment, to evaluate the grinding efficiency and to calculate the …
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bond grindability of li ne
T05:08:25+00:00 18th Relationships Between Bond's Grindability (G ) and . Bond's grindability associated with tumbling mills (PrasherJ987) Bond's grindability can be empirically related to the energy required for comminution and thus is useful for the design and selection of crushing and grinding equipment (Deniz et al, 1996) İn the recent …
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THE BOND WORK INDEX OF LIMESTONE AND …
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 and 150 microns. The Bond Work Index is calculated using the formula (Bond, 1961): (√ √) (1) where: W i – Bond work index (kWh/t); P c – test sieve mesh size (µm);
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A Review of Alternative Procedures to the Bond Ball Mill …
Keywords: grindability; comminution; Bond work index . 1. Introduction . Determining the Bond index using the Fred Bond method [1,2] is considered the state‐of‐the‐art …
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