Table of Bond Work Index by Minerals. Table of Bond Work Index by Minerals . Post navigation. Previous. Next. 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 Source 5 Source 6 Source 6 KWh/t Source 6; Avg Bond Work Index: …

The ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100% passing 3.36 mm (6 mesh) to product size in the range of 45-150 µm (325-100 mesh), thus determining the ball mill work index (Wi B or BWi). The work index calculations across a narrow size range are conducted using the appropriate laboratory work index determination for the material size of ...

01/01/2009· 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 for grinding, and for ball mill scale-up. The test ...

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 ...

This paper examines potential relationships between UCS and Bond Work Index values (crushing, rod mill and ball mill). Data from 11 mines located around the world is analysed for correlations between UCS and various Wi values. Introduction Need to accurately predict future mine and mill production rates requires a knowledge of ore grindability well in advance of when ore are actually mined ...

1.2 kg of minus 6 mesh ore. Bond Ball Mill Grindability Test. The test determines the Bond Ball Mill Work Index which is used with Bond’s Third Theory of Comminution to calculate net power requirements*. Various correction factors may have to be applied. W = Wi (10/√P – 10/√F) Where W = Net power consumption in kWh/t Wi = Bond work index (either Imperial or Metric units) P = The 80% ...

The Bond's standard ball mill is used to determine the work index value of differ ent samples. The Bond work index is defined as the kilowatt-hours per short ton required to break from infinite size to a product size of 80% passing 100 µm. If the breakage characteristics of a material remain constant over all size ranges, the calcul ated work ...

Table I shows the Bond ball mill work index obtained for the ore samples as well as the iron and silica content in concentrate and tail after LIMS. The concentrate weight recovery was in the order of 50–60%. Furthermore it may be observed that the Bond ball mill work indices for the ore (Wi) varies from 14.6 to …

behavior although the applied fracture mechanism of the mill cannot be excluded. With crushed ore samples from Malmberget also grindability tests and mineral liberation analyses were conducted using laboratory tumbling mills of different size. Starting from the dimensions of the Bond ball mill a modified test method was developed where small size samples of approximately 220 g were pre-crushed ...

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 ...

bond milling index of crushed iron ore. High pressure grinding moving ahead in copper, iron, and High pressure grinding moving ahead in copper, iron, and gold processing One direct effect is that the crushed particles can be recycled through the same HPGR unit » Learn More. Bond Ball Mill Index Test . Bond Ball Mill Index Test JKTech A BBMWI test is a standard test for determining the Bond ...

This paper examines potential relationships between UCS and Bond Work Index values (crushing, rod mill and ball mill). Data from 11 mines located around the world is analysed for correlations between UCS and various Wi values. Introduction Need to accurately predict future mine and mill production rates requires a knowledge of ore grindability well in advance of when ore are actually mined ...

18/10/2018· Celtest have the capability to carry out the Bond Work Index (BWI) Test in accordance with EPRI Report CS3612 : FGD Chemistry and Analytical Method Handbook, Volume 2 . The BWI is used to estimate the required mill power per ton of product (Specific Energy). The specific energy requirements and the desired production rate determine the mill length and diameter. For more …

The Bond Abrasion Test determines the Abrasion Index, which is used to determine steel media and liner wear in crushers, rod mills, and ball mills. Bond developed the following correlations based on the wear rate in pounds of metal wear/kWh of energy used in the comminution process. Wet rod mill: Rods: lb/kWh = 0.35(Ai – 0.020) 0.2: Liners: lb/kWh = 0.035(Ai – 0.015) 0.3 : Wet ball mill ...

The Bond's standard ball mill is used to determine the work index value of differ ent samples. The Bond work index is defined as the kilowatt-hours per short ton required to break from infinite size to a product size of 80% passing 100 µm. If the breakage characteristics of a material remain constant over all size ranges, the calcul ated work ...

Bond's theory and index brought a greater measure of openness to the calculations for selecting the type, size, and power ratings for ore milling equipment. [5] Bond was inducted with its first class into the National Mining Hall of Fame posthumously in 1988, [6] and received a Distinguished Achievement Medal by his alma mater, the Colorado School of Mines, in 1952. [7]

can be determined using the data generated by a conventional Bond ball mill work index test (M. ib. is NOT the Bond ball work index). M. ic. and M. ih. values are also provided as a standard output from a SMC Test ® (Morrell, 2009). The general size reduction equation is as follows (Morrell, 2004. b): f x f x 2. 1 i i. 4 2 W M x x. 1 (1) where . M. i = Work index related to the breakage ...

behavior although the applied fracture mechanism of the mill cannot be excluded. With crushed ore samples from Malmberget also grindability tests and mineral liberation analyses were conducted using laboratory tumbling mills of different size. Starting from the dimensions of the Bond ball mill a modified test method was developed where small size samples of approximately 220 g were pre-crushed ...

A mill is a device that breaks solid materials into smaller pieces by grinding, crushing, or cutting. Such comminution is an important unit operation in many processes.There are many different types of mills and many types of materials processed in them. Historically mills were powered by hand or by animals (e.g., via a hand crank), working animal (e.g., horse mill), wind or water ().

bond milling index of crushed iron ore. High pressure grinding moving ahead in copper, iron, and High pressure grinding moving ahead in copper, iron, and gold processing One direct effect is that the crushed particles can be recycled through the same HPGR unit » Learn More. Bond Ball Mill Index Test . Bond Ball Mill Index Test JKTech A BBMWI test is a standard test for determining the Bond ...

10/01/2020· 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 product size of three iron ore samples are ...

This paper examines potential relationships between UCS and Bond Work Index values (crushing, rod mill and ball mill). Data from 11 mines located around the world is analysed for correlations between UCS and various Wi values. Introduction Need to accurately predict future mine and mill production rates requires a knowledge of ore grindability well in advance of when ore are actually mined ...

1500 x 675 x 1200 mm 300 kgs (only machine) 230V/50Hz/60Hz Variable 0-80 rpm 0.75KW Bond Crushing Work Index (CWI) The Bond Crushing Work Index (CWI) describes the competency of the ore at larger particle sizes. It is used for the calculation of the actual crusher power requirements.

Bond's theory and index brought a greater measure of openness to the calculations for selecting the type, size, and power ratings for ore milling equipment. [5] Bond was inducted with its first class into the National Mining Hall of Fame posthumously in 1988, [6] and received a Distinguished Achievement Medal by his alma mater, the Colorado School of Mines, in 1952. [7]

This step involves the material being retained inside the mill for a specific time (with or without grinding balls) which is calculated by applying Bond’s work index to the process calculation. This index takes into account the material ore hardness and feed size, mill speed, material recirculation, desired fineness, etc. When the material exits the mill, the iron ore is classified using ...

The Bond Abrasion Test determines the Abrasion Index, which is used to determine steel media and liner wear in crushers, rod mills, and ball mills. Bond developed the following correlations based on the wear rate in pounds of metal wear/kWh of energy used in the comminution process. Wet rod mill: Rods: lb/kWh = 0.35(Ai – 0.020) 0.2: Liners: lb/kWh = 0.035(Ai – 0.015) 0.3 : Wet ball mill ...

The Bond's standard ball mill is used to determine the work index value of differ ent samples. The Bond work index is defined as the kilowatt-hours per short ton required to break from infinite size to a product size of 80% passing 100 µm. If the breakage characteristics of a material remain constant over all size ranges, the calcul ated work ...

can be determined using the data generated by a conventional Bond ball mill work index test (M. ib. is NOT the Bond ball work index). M. ic. and M. ih. values are also provided as a standard output from a SMC Test ® (Morrell, 2009). The general size reduction equation is as follows (Morrell, 2004. b): f x f x 2. 1 i i. 4 2 W M x x. 1 (1) where . M. i = Work index related to the breakage ...

24/10/2018· The work index can either be measured in the laboratory (the Bond ball mill work index determination is a common example) or it can be calculated from the operating performance of a milling ...