Bond Work Index And Grind Size Iron Ore

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Bond Work Index - an overview | ScienceDirect Topics

The Bond work index is not solely a material constant but is influenced by the grinding conditions. For example, the finer the grind size desired, the higher is the kWh/t required to grind to that size. Magdalinovic [38] measured the Bond work index of three ore types using different test screen sizes. He produced a correlation between the mass of test screen undersize per revolution, G, and ...

Table of Bond Work Index by Minerals - 911 Metallurgist

Jun 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

Bond Work Index Formula-Equation - 911 Metallurgist

grinding the reference and test ore with the same particle size distribution under the same grinding conditions. Typical feed load and mill speed in practice were used in order to make the grinding environment as close as possible to that in large scale grinding. The Bond’s work index of Baban Tsauni (Nigeria) ore was found to be 11.52kWh/tonne.

Bond Work Index Procedure and Method - 911 Metallurgist

Jun 06, 2015· 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 samples in a Ball Mill using a standard ball charge.. Below describes in general terms the Bond Work Index Procedure used by a Professional Metallurgical Testing Laboratory.

QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE …

The Bond work index is a parameter which represents a measure of an ore resistance to grinding. Numerically, the work index represents the energy (kWh/sht) required to reduce the material of one short ton from a theoretically infinite feed size to size at which 80 percent of material passes through sieve with square aperture100

Estimation of Grinding Time for Desired Particle Size ...

Jan 03, 2020· 高达10%返现· A bench test was developed for dry grinding to determine the Bond work index and to know the PSD and hematite liberation in all the three iron ore product samples obtained from the BBM. For each iron ore sample, 700 cc of feed was weighed and added into the BBM. The BBM was set for 100 revolutions in the first iteration.

Bond Work Index Report Matrix House - 911 Metallurgist

in the design of a grinding circuit. The Work Index is used when determining the size of the mill and grinding power required to produce the required ore throughput in a ball mill. 2. Procedure 2.1. Bond Ball Mill Grindability The sample was crushed to 100% passing 6 mesh (3.35mm), from this a 700 cc volume was measured and weighed to be used ...

Investigation on Iron Ore Grinding based on Particle Size ...

高达10%返现· May 28, 2020· 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 measured by a …

CORRELATION BETWEEN BOND WORK INDEX AND …

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

Investigation of iron ores based on the bond grindability ...

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.

(PDF) Comparative Analysis of Grindability of Iron-ore and ...

Personal communication, Federal University of Technology, Akure pp.12‐14 Conclusion Ajayi S. (1998) Determination work index of Julius Berger Silica was seen in iron‐ore as the major impurity, Granite using the modified Bond’s method, p 13.

bond work index grinding equipment sizing

bond work index grinding equipment sizing. AS a leading global manufacturer of crushing and milling equipment, we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete stone crushing plant.

Bond Tests | SGS

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

bond crushing and grinding calculations pdf

Abstract 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 Determining the Bond ...

Bond Grinding Work Index Of Indian Iron Ore

3 bond mill of mining industry labtech . bond f c crushing and grindig calculations coal mills manufacturers in beiging china bond grinding work index of indian iron ore;index bond mill of mining

distribution of iron ore deposits in nigeria grinding mill ...

grinding the reference and test ore with the same particle size distribution under the same grinding conditions. Typical feed load and mill speed in practice were used in order to make the grinding environment as close as possible to that in large scale grinding. The Bond’s work index of Baban Tsauni (Nigeria) ore was found to be 11.52kWh/tonne.

Development of Mathematical Model for Integrated Iron Ore ...

The inputs to the circuit like plant operating and design data’s, particle size distribution (PSD), flow rates (TPH), bond work Index, etc were determined by collecting each sample from site and analysing it in laboratory. The ball mill used in simulation is assumed to be working at steady state which utilises perfectly mixing model.

Ore Grinding Working

In the present work, the effects of some key grinding parameters such as ball size 2040 mm, grinding time 1030 min, solids content 6580, and also ore work index 1215.4 kwht on the grinding of some copper sulphide ore were investigated. product 80 passing size d80 was defined as process response.

First choice for HPGR technology and service

Bond work index reduction In applications where the HPGR is followed by ball milling, the induced micro fractures generally result in a reduction of the Bond Work Index. For most ores this reduction ranges between 10-25%. Obviously this allows for grinding at either …

Determination of Bond Work Index of Lucky Cement …

work index (W i) having a different samples of limestone in-cluding Face-2B, Face-4A, Face-4B, Face-5A, Face-5B, Face-6A and Face-6B were collected from Lucky Cement Limited. These samples analyzed for Bond work index. Work index results show that all samples falls under the cate-gory of HARD ROCK except Face-4A (W i <20kwh/t). Limes-

blaine index iron ore | Solution for ore mining

Mar 19, 2013· Work Index and Grinding Energy Assessment of Dilband Iron Ore … 2.3 Blaine Air Permeability Test The specific surface area was measured using Blaine Air … index of Dilband iron ore. The test is based on the Bond’s. iron ore required to produce 1 ton of clinker for cement. Iron Ore …

grindability work index for iron ore | worldcrushers

Jul 01, 2013· World consumption of iron ore grows 10% per annum on average with the main consumers being China, Japan, Korea, the United States and the European Union. This entry was posted in Uncategorized. Bookmark the permalink .

bond index mill for grinding china 31538

bond index mill for grinding china 31538. AS a leading global manufacturer of crushing and milling equipment, we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete stone crushing plant.

Evaluation of grinding circuits for iron ore

The Bond theory correlates the work index to the particle breaking. The work index (W i) is the comminution parameter that expresses the ore resistance to crushing and grinding. The Wi is equivalent to the needed kilowatt hour per short ton, in order to reduce an ore size …

A developed approach based on grinding time to determine ...

Besides, the results of work index tests are accordingly implemented in Equation 5 to calculate the ore work index values. Equation 5 is similar to Bond work index equation, but it has been defined for the foregoing calibrated bond ball mill [15]. P F P G Wi i i 10 10 11.76 1 1 230. 75 u u (5) Where, W i =Bond laboratory ball work index

The Six Main Steps of Iron Ore Processing | Multotec Canada

Mar 14, 2018· 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.

bond crushing and grinding calculations pdf

Abstract 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 Determining the Bond ...

grindability work index for iron ore | worldcrushers

Jul 01, 2013· World consumption of iron ore grows 10% per annum on average with the main consumers being China, Japan, Korea, the United States and the European Union. This entry was posted in Uncategorized. Bookmark the permalink .

blaine index iron ore | Solution for ore mining

Mar 19, 2013· Work Index and Grinding Energy Assessment of Dilband Iron Ore … 2.3 Blaine Air Permeability Test The specific surface area was measured using Blaine Air … index of Dilband iron ore. The test is based on the Bond’s. iron ore required to produce 1 ton of clinker for cement. Iron Ore …

distribution of iron ore deposits in nigeria grinding mill ...

grinding the reference and test ore with the same particle size distribution under the same grinding conditions. Typical feed load and mill speed in practice were used in order to make the grinding environment as close as possible to that in large scale grinding. The Bond’s work index of Baban Tsauni (Nigeria) ore was found to be 11.52kWh/tonne.

Ore Grinding Working

In the present work, the effects of some key grinding parameters such as ball size 2040 mm, grinding time 1030 min, solids content 6580, and also ore work index 1215.4 kwht on the grinding of some copper sulphide ore were investigated. product 80 passing size d80 was defined as process response.

First choice for HPGR technology and service

Bond work index reduction In applications where the HPGR is followed by ball milling, the induced micro fractures generally result in a reduction of the Bond Work Index. For most ores this reduction ranges between 10-25%. Obviously this allows for grinding at either …

bond index mill for grinding china 31538

bond index mill for grinding china 31538. AS a leading global manufacturer of crushing and milling equipment, we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete stone crushing plant.

(PDF) A developed approach based on grinding time to ...

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. ... A developed approach based on grinding time to determine ore …

Grindability Index Of Orissa Iron Ore

Investigation of iron ores based on the bond . 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 .

bond inde mill for grinding chattisgarh - Bussa Machinery

in the design of a grinding circuit. The Work Index is used when determining the size of the mill and grinding power required to produce the required ore throughput in a ball mill. 2. Procedure 2.1. Bond Ball Mill Grindability The sample was crushed to 100% passing 6 mesh (3.35mm), from this a 700 cc volume was measured and weighed to be. Read More

iron ore grinding ball mill tone | Prominer (Shanghai ...

Bond Work Index - an overview ScienceDirect Topics. Bond impact crushability work index CWi ranges for an Australian iron ore The ball mill work index laboratory test is conducted by grinding an ore sample If the Bond work index is 400 kWh/ton, what is the power requirement to process . Get Price