As well as, the Bond Work Index (BWI) and consumed power to grind one tone of iron ore were determined via standard Bond mill. The results showed that the ore is hematitic ore with …
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 ...
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.
Bond index is useful in designing of grinding system in mineral processing. In this study, the Bond work index of a low grade iron ore is determined using modified Bond's method. Samples of …
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 ... Bond work index which is also known as ore grindability
Bond work index and the consumed energy [6]. Berry and Bruce (1966) discovered new method for determining the work index, the concept of this method depended on the use of a reference ore of known work index[7]. Iron ore is one of the important industrial minerals used in steel industrials. Magnetite, hematite and goethite are considered the ...
grindability well in advance of when ore are actually mined. Traditional measurements of ore grindability are the Bond Work Index (Wi) values (Bond, 1952), divided into a low energy crushing work index (Wi C) for coarse rocks (75-50 mm), a rod mill work index (Wi RM) for intermediate sized particles (25-3 mm), and a ball mill work index (Wi
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 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 geological formation of each iron ore sample. The output product of three iron ore sample composed of three different size fractions when ground in Bonds ball mill. Based on the BWI and output ...
Bond´s equation have evidenced quite reliable for different grinding designs and reached an extensive acceptance to nowadays. Table 4 shows the Bond work indices for some minerals …
The goal of this work is to create an equation to adjust a Bond ball mill work index from one P 80 basis to another. The proposed model consists of two components, the variable coefficient that is determined from a specific work index determination and a fixed exponent determined by a calibration procedure.
The result shows that the maximum Bond work index of 14 KWh/mt was obtained for 'A' type iron ore sample. The Bond work index for 'B' and 'C' type iron ore sample are of 11 and 10 KWh/mt.
The Bond work index (Wit) of the Muro iron ore using granite as the reference ore is calculated as follows: Wir = work index of reference sample (Granite) is 11 kWh/t Pr = 80% passing size of product of ball mill for the reference sample is 198.4 µm Fr = 80% passing size of feed to ball mill for the reference sample is 752.3 µm Pt = 80% ...
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 quartz mineral which is considered the main gangue of the ore in study area .
20.39 Kwh/short ton was selected as it is within the range indicated by previous research work on iron ore in Nigeria. Keywords: Bond index, Birnin-Gwari iron ore, modified, reference minerals, mineral processing. 1. INTRODUCTION Iron ore deposits are usually present as iron oxides (magnetite, Fe3O4; haematite, Fe2O3),
Bond Rod Mill Grindability Test. GSL can carry out Bond Rod Mill Work Index tests to determine the energy requirements for milling ore in a rod mill. The test requires a minimum of 20kg of -12.5mm material. Closing screen sizes typically range from 4.75mm to 212µm. Abrasion Index Test. The Abrasion Index is a recognised procedure to quantify ...
The Bond Work Index (Wi) is a common technique for the estimation of hardness and energy requirement for comminution using ball mills. ... g/cm 3) is a ma ssive, sulphured ore with high iron ...
The test is designed to give a reasonable indication of the grinding work index of an ore material relative to one or more known standards. It is not 911 Metallurgist is a trusted resource for practical insights, solutions, and support in mineral processing engineering, helping industry professionals succeed with proven expertise. | Relative ...
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 ...
Maxson et al, (1933). It was extended by Bond (1952) to provide a work index result that was empirically calibrated to make a laboratory work index match the corresponding work index measured in an industrial grinding mill. The fitted equation, in metric form, is given as Equation (1). (1) 𝑊𝑖= 1.1023×44.5 𝑃100 0.23× À0.82×(10 √ ...
The result shows that the maximum Bond work index of 14 KWh/mt was obtained for 'A' type iron ore sample. 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 geological formation of each iron ore sample. The output product of three ...
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 …
work index test conducted on iron ore sample using laboratory ball mill runs at 70 pm and the observed 9.25 ... The Bond work index is a measure of ore resistance to crushing and grinding and is ...
Grinding is one of the most costly operations in the mechanical breaking and mining. Determination of the breakage characteristics and preconditioning is important to increase the grinding efficiency. Investigations of the seismic, mechanical and breakage properties of iron oxides are very important parameters for investigating the rock fragmentation by blasting and …
Bond work index is an index to evaluate the difficulty of ore grinding. The theoretical basis of Bond work index to measure ore grindability is Bond's ore crushing crack theory [24,25,26]. According to the standard Bond test requirements, the bond work index test of raw materials and pre-enriched adopted a Φ305 × 305 mm standard work index ...
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 ...
The feed samples of X, Y, and Z iron ores were ground in the BBM (ball mill refers to a BBM of size 300 mm × 300 mm with smooth liners) to identify the PSD, BWI, and RT of each ore. Grinding experiments were conducted according to Bond's standard test procedure [].For each iron ore sample, the RT taken to produce 250% circulating load in the BBM was …
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 …
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 geological formation of each iron ore sample. The output product of three iron ore sample composed of three different size fractions when ground in Bonds ball mill. Based on the BWI and output ...
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. ... V. B. and Kuskova, Ya. V. Development of technology for the production of natural red iron oxide pigment. Inzynieria ...
Then, the relations between Bond work index (BWi), as one of the most important geometallurgical variables and the primary grindability index, and rock geomechanical properties are investigated based on the previously published studies. ... "Drill core texture as geometallurgical indicator for the Mont-Wright iron ore deposit (Quebec, Canada ...
This Grindability Test or Bond Ball Mill Work Index Procedure is used to determine the Bond Work Index of minus six mesh or finer feed ore samples. These equation application methods are used to process <1/2″ ore …
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 basic work index equation is: W = 10 Wi/√P – 10 Wi/√F(1) where W is the work input required in kilowatt hours per short ton to grind from 80% passing F microns to 80% passing P microns, and Wi is the work index, or the grinding resistance parameter. It represents the energy input required in kilowatt hours to reduce a sh…See more on 911metallurgist
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 …