Bond Work Index Grinding Ore

Bond Work Indexan 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

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Bond Work Index (Energy equation)Grinding,

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)

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Table of Bond Work Index by Minerals

19/06/2015· Spodumene ore: 11.4: 10.4: 11.4: 11.5: Steel mill nerup: 22.2: 6-89: 16: Syenite: 14.5: 13.1: 14.4: 14.5: Tale: 15.3: 8-22: 10: Tin ore: 12.0: 11.2: 10.9: 12.0: 11.5: 11.8: 10-14: 12: Titanium ore: 13.6: 11.9: 12.3: 13.6: 14.0: 11.4: 7-17: 9: Tungsten ore: 11.0: 7-17: 4: Trap rock: 21.3: 19.3: 21.3: 21.5: Uranium Ore: 17.0: 14.6: 10-30: 18: Zinc ore: 12.7: 12.4: 11.6: 12.7: 13.5: 12.0: 10.9: 6-16: 9: Zircon Sand: 20.0

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Bond Work Index Of Grinding Oreenvieduneancienne.fr

The Bond work index Wi is used as a measure of grindability of an ore,materials' specific grinding energy and Bond work index for the Rowland and Kjos,get price 20150505 Bond Efficiency-GMSG-ICE

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QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE VALUE,

Keywords: Bond work index, grinding, kinetics Introduction Fred C. Bond noted that experiments in an open grinding cycle are unsuitable for determining the energy consumption during grinding, and can cause inaccurate energy consumption prediction required for grinding, especially in a closed cycle, or for complex ore composed of different minerals. Based on these observations, Bond and others,

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(PDF) A quick method for bond work index approximate value,

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,

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Bond Work IndexDetermination of the Bond Work Index of,

Lastly, substituting all the values in equation 1 the Bond work index of the ore was determined to have a value of 41.38 kWh/tone. The Bond work index, in addition to it as being the measure of the material’s hardness or resistance to crushing and grinding, gives an important indication of the efficiency of

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Application of Operating Work Indices in Autogenous,

conventional grinding circuits (Bond 1961). Bond’s third theory is presented in [1]. By rearranging the formula to [2], the operating work index (Wio) of an existing grinding circuit can be calculated, given known mill power draw, throughput, feed and product size distributions. kWh/t = Power applied per ton of feed to the grinding unit Wi = The standard Bond work index of the ore P 80 = The,

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GrindabilityMinerallurgy

Ore grindabihty refers to the ease with which materials can be comminuted and data from grindability tests are used to evaluate crushing and grinding efficiency.Probably the most widely used parameter to measure ore grindability is the Bond work index W; The work index, Wi, is calculated kWh per ton applied in reducing material of infinite,

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Effect of magnetite content on Bond work index and,

28/04/2018· Bond work index and magnetite percent were investigated in the 430 blasts in the mine. This investigation not only confirmed the small scale blasting results, but also showed that increasing the magnetite percent up to 50% noticeably reduces Bond work index and energy consumption in the grinding process. Also, the relationship between muck pile fragmentation and magnetite percentage were,

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20150505 Bond Efficiency-GMG-ICE-v1-r04 Determining the,

Calculate the Actual Operating Bond Work Index of the grinding circuit. • Estimate the F80 and P80. • Calculate the work or specific energy input from the size reduction equipment power and circuit tonnage (equation 1). Auxiliary equipment power is excluded. P W = ––– (1) T Where, W is the specific work input (kWh/t), P is the equip-ment power (kW), and T is the circuit tonnage,

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Investigating of the effect of ore work index and particle,

01/04/2016· In the present work, the effects of some key grinding parameters such as ball size (20–40 mm), grinding time (10–30 min), solids content (65–80%), and also ore work index (12–15.4 kWh/t) on the grinding of some copper sulphide ore were investigated. Product 80% passing size (d80) was defined as process response.

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CORRELATION BETWEEN BOND WORK INDEX AND

correlation between the abrasion value(X2) and work index (Wi) is found to be Wi = -1.8 Ln (X2) + 11.5 with correlation coefficient of 0.80. KEYWORDS: Bond work index ± Mechanical properties of rocks ± Grinding energy- Crushing resistance 1- INTRODUCTION Comminution in a mineral processing plant, or mill, involves a sequence of crushi ng

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Correction of Bond Ball Mill Work Index Test for Closing,

07/12/2018· Correction of Bond Ball Mill Work Index Test for Closing Mesh Sizes Yardin Josefin1*,,In his Third Theory of grinding, Bond (1952) observes that the net energy required in comminution has the same units one obtains considering the geometry of linear cracks inside spheres. This resulting power-based model with an exponent of -0.5 has been widely accepted and applied in conventional milling,

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Bond Work Index TestsGrinding Solutions Ltd

Bond Rod Mill Grindability Test. Grinding Solutions 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

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Bond Work IndexDetermination of the Bond Work Index of,

Lastly, substituting all the values in equation 1 the Bond work index of the ore was determined to have a value of 41.38 kWh/tone. The Bond work index, in addition to it as being the measure of the material’s hardness or resistance to crushing and grinding, gives an important indication of the efficiency of

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【bond work index of grinding ore】caleuche.es

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

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bond grinding work index of indian iron ore

Bond Work Index an overview ScienceDirect Topics. The ball mill work index laboratory test is conducted by grinding an ore sample prepared to 100 passing 336 mm 6 mesh to product size in the range of 45150 µm 325100 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,

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20150505 Bond Efficiency-GMG-ICE-v1-r04 Determining the,

Calculate the Actual Operating Bond Work Index of the grinding circuit. • Estimate the F80 and P80. • Calculate the work or specific energy input from the size reduction equipment power and circuit tonnage (equation 1). Auxiliary equipment power is excluded. P W = ––– (1) T Where, W is the specific work input (kWh/t), P is the equip-ment power (kW), and T is the circuit tonnage,

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Comparison of Ore Hardness Measurements for Grinding Mill,

14/01/2021· Key Words: Comminution Tests, Bond Work Indices, JKTech, Grinding Mill Design, Database, Ore Hardness Measurements, JK Drop Weight Test, SAGDesign Test . ABSTRACT As part of the ongoing project development for the Tenke Fungurume Copper-Cobalt Project in the Democratic Republic of Congo, Phelps Dodge Corporation has examined methodologies for determining the size of grinding mills to

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Effect of magnetite content on Bond work index and,

28/04/2018· Bond work index and magnetite percent were investigated in the 430 blasts in the mine. This investigation not only confirmed the small scale blasting results, but also showed that increasing the magnetite percent up to 50% noticeably reduces Bond work index and energy consumption in the grinding process. Also, the relationship between muck pile fragmentation and magnetite percentage were,

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Investigating of the effect of ore work index and particle,

01/04/2016· In the present work, the effects of some key grinding parameters such as ball size (20–40 mm), grinding time (10–30 min), solids content (65–80%), and also ore work index (12–15.4 kWh/t) on the grinding of some copper sulphide ore were investigated. Product 80% passing size (d80) was defined as process response.

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CORRELATION BETWEEN BOND WORK INDEX AND

correlation between the abrasion value(X2) and work index (Wi) is found to be Wi = -1.8 Ln (X2) + 11.5 with correlation coefficient of 0.80. KEYWORDS: Bond work index ± Mechanical properties of rocks ± Grinding energy- Crushing resistance 1- INTRODUCTION Comminution in a mineral processing plant, or mill, involves a sequence of crushi ng

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Kinetic grinding test approach to estimate the ball mill,

Keywords: work index, Bond method, kinetic grinding test, grindability, ball mill Introduction The standard Bond (1952; 1961) method is widely used in the course of design, selection, scale up, energy calculation and performance evaluation of grinding circuits in mineral processing industry. This is mainly owed to the wide and valid database this method uses to derive its empirical equation,

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