A meaningful expression between bond work index, grindability index …
The average value of the last three cycles is taken as the standard Bond grindability (G), which is the net grams of undersize produced per mill revolution. "Work Index, W i " is given by the following empirical equation: (1) W i = 44. 5 / P 0. 23 · G 0. 82 · (10 / P 80-10 / F 80) 4. Brittleness test for the determination of friability value
Prediction of Bond's work index from field measurable rock …
DOI: 10.1016/J.MINPRO.2016.10.006 Corpus ID: 99402495; Prediction of Bond's work index from field measurable rock properties @article{Chandar2016PredictionOB, title={Prediction of Bond's work index from field measurable rock properties}, author={Karra Ram Chandar and S. N. Deo and Ashwin J. …
Determination of Abrasiveness in Copper-Gold Sulfide …
The geological context of this study is established in the iron oxide-copper-gold (IOCG) deposit of Sossego (Canaã dos Carajás, Brazil), where hydrothermal alterations in shear zones concentrated the metals …
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 mesh or finer …
Characterization and Bond Work Index Determination of Low …
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 quartz mineral which is considered the main gangue of the ore in study area.
(PDF) COMPARISON OF THE DIFFERENT WAYS OF THE BALL BOND WORK INDEX
The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. ... Most of the iron ore deposits in Russian Federation are known for showing comparatively low grade ores and are consequently subjects for a necessity of ore dressing that requires obligatory intense grinding ...
Determination of Bond index of Birnin- Gwari Iron Ore in Nigeria
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 ...
Bond Work Index Formula-Equation
Basic Equations The basic work index equation is: W = 10 Wi/√P – 10 Wi/√F………………………………………………………………………… (1) where W is the …
Comparison of Ore Hardness Measurements for Grinding Mill …
The results from this work are presented below and are discussed in this paper. The SAGDesign results were compared to JK Drop Weight analysis of results by analyzing the SAGDesign Database for all tests done to date for SAG Pinion Energy (to T80 1.7 mm) and Bond Work Index on SAG ground ore.
A developed approach based on grinding time to determine ore
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 representative ore sample contained 57%Fe, 0.9%P and 0.17%S. The sample was crushed; afterward, it was ground in …
Development of process for beneficiation of low-grade iron …
work, 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 20,125 g. The particle size of the sample used for the test work was smaller than 3.35 mm — smaller than 6 mesh. TG-DTA.
Simulating breakage tests using the discrete element method with
Bond crushability work index has been calculated on the basis of impact load cell test results and through correlations with rock mechanical properties . Breakage models imbedded in simulations using the discrete element method (DEM) have evolved significantly in recent years, becoming powerful tools to predict breakage of rock in …
Determination of Bond index of Birnin- Gwari Iron Ore in Nigeria
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 the use of a reference ore of
Determination of Bond index of Birnin- Gwari Iron Ore in Nigeria
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. The value of 20.39 Kwh/short ton was selected as it is within the range indicated by previous research work on iron ore in Nigeria.
Procedure for determination of ball Bond work index in
Fig. 1 (a) shows the ore used in the determination of the Work Index with the standard methodology (Bond, 1961), the reduced methodology (Ahmadi et al., 2009), and with the use of standard and ...
Determination of Bond index of Birnin- Gwari Iron Ore in Nigeria
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 the laboratory ball mill grinding ...
The Importance of Work Index in Mineral Processing
13. Limestone. 16. Gold Ores. The kilowatt-hours per tone (kWh/t) will work out your work index. The number of kittowatts consumed in a hour divided by the tonnes of rock gives you your work index. Remember, the higher the Work Index the more work required to crush the rock. This will impact the equipment chosen for your project.
Table of Bond Work Index by Minerals
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.
Table of Bond Work Index by Minerals
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 …
The product of Test ore of the ball mill. | Download …
The Bond's equation was then used to calculate the work index of the Muro iron ore which was found to be 24.84 kWh/ t when marble was used as reference ore and 27.41 kWh/ t when granite was used ...
Comparison of the Different Ways of the Ball Bond Work Index
Semi-industrial tests ensure the most reliable information for calculating loads for equipment. However, this requires a significant amount of ore samples, a lot of labor and the pilot plants. Fred Bond published an article in 1961, which, described the procedure for testing ores for a Bond Ball Index.
Correction of Bond Ball Mill Work Index Tests for Closing Sizes
The test work program was carried out on those five ore samples obtained from the copper-porphyry orebodies. Total of 38 Bond work index tests, including duplicates, were done. Standard Bond ball mill test procedure were carried out on crushed (-3.35 mm / 6 mesh) material at different
Correlation of crushing work index and drop-weight index.
Comminution testing indicated that A*b values may be reduced by up to 7-14% and that the Bond Ball Mill Work Index may be reduced by up to 3-9% depending on the ore type under investigation.
Comparison of the Different Ways of the Ball Bond Work Index
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. Its value constitutes ore characteristic and is used for industrial….
Rapid determination of Bond rod-mill work index by modeling the
To calculate the Bond work index ( Wi) in a standard laboratory scale rod-mill, Bond derived the following equation: W i = 62 P i 0.23 G i 0.625 10 P - 10 F kw h sh t where F is 80% passing size of original feed, P is 80% passing size of circuit product and Pi is the test-sieve size in μm [1]. The standard procedure to determine all Bond work ...
Determination of Abrasiveness in Copper-Gold Sulfide Ores: …
the Bond [1] test method, the preferred alternative among the various abrasion tests avail-able [2,4–7,11]. The outcome of this test is the Bond abrasion index (Bond Ai), which finds widespread use among metallurgists and suppliers of consumables for crushers and mills as a parameter to estimate the expected wear of such …
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 …
Investigation of iron ores based on the bond grindability test
The Bond work index for 'B' and 'C' type iron ore sample are of 11 and 10 KWh/mt. The variation of BWI of three iron ore sample may be varied during the …
Physical, mechanical and metallurgical characteristics of banded
X-ray diffraction analysis indicated that silica and iron are the major phases whereas alumina and goethite are the gangue mineral. Thermo-gravimetric analysis revealed it to be oxy-hydrated with iron in hematite phase. Vickers hardness test and bond work index revealed hard and compact nature of the ore.
Metals | Free Full-Text | Variability Study of Bond Work Index and
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 …