be used to calculate Mergan work index, but this Mergan work index differs from the Bond work index Therefore, it is needed to analyze if the Mergan work index correlates with Bond work index All the testwork was conducted using Outotec Mergan and Bond ball mills at Outotec Research Center, located in the city of Pori, Finland

AG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill, and some or all of the work of a ball mill , Energy and power calculations based on Bonds Work Index (Wi, normally expressed in kWh/ short ton) , Lesson 5 Crushing; AMIT 135: Lesson 6 Grinding Circuit;

Fred Chester Bond (June 10, 1899 – January 23, 1977) was an American mining engineerA graduate and former professor of the Colorado School of Mines, he worked in the mining equipment and ore milling equipment business of Allis-Chalmers from 1930 to 1964

Comminution is the reduction of solid materials from one average particle size to a smaller average particle size, by crushing, grinding, cutting, vibrating, or other process In geology, it occurs naturally during faulting in the upper part of the Earth's crust In industry, it is an important unit operation in mineral processing, ceramics, electronics, and other fields, accomplished with .

1, according to Bond [2] n = 05 and according to Charles [3] and Stamboliadis [4], n can take any value near these two In the case that the initial size is infinite and the final size is 100 μm then by definition the required specific energy is called work index W i ,100 e W i (2) The value of the constant C in (1) can be calculated

Jan 24, 2014· Bond’s work index is the work required to reduce unit weight from a theoretical infinite size to 80% passing 100µm This theory is useful for rough mill sizing The work index is useful for comparing efficiency of milling operations 9 10 For compression of large particles kick’s theory is ,

CORRELATION BETWEEN BOND WORK INDEX AND MECHANICAL PROPERTIES OF SOME SAUDI ORES Gamal S Abdel Haffez KAU, Jeddah, KSA E-mail: [email protected] Lecturer, Mining Engineering Dept ±Faculty of Engineering- Assiut , The Bond work index is regarded as one of the crushing

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May 14, 2010· Where Kb is a constant that depends on the type of machine and on the material being crushed To use this equation, a work index Wi is defined as the gross energy requirement in kilowatt-hours per ton of feed needed to reduce a very large feed to such a ,

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bonds crushing law and work index - Free download as PDF File (pdf), Text File (txt) or view Crushing and Grinding Calculations New Bond Work Index Formula-Equation - Mineral Processing/Metallurgy

bond work index for coal in crusher | crusher This page is about bonds crushing law and work index, The Bond Equation utilizing work index as the measure Know More Bond - Dictionary Definition of Bond - About Education Definition of Bond Mike Moffatt Economics Expert Share Pin Tweet .

Sep 04, 2016· Three laws of comminution or size reduction such as Kick's law, Rittinger's law and Bond's law are defined and its objectives in industrial processes are ,

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 work index ,

Ball Mill Grade Discharge Design Fdp Our ball mills are industrial grade and designed for continuous operation equipped with oversize roller bearings and a complete drive system All wear parts are highly abrasion resistant and replaceable The capacity or throughput of a ball mill is directly linked to particle size of the ball mill discharge

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Chapter 3 - Particle Technology (Size Reduction) Kick’s law: the work required for crushing a given mass of material is constant for the same reduction ratio, , 322 Bond crushing law and work index

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 measured the Bond work index of three ore types

A clear definition of the required crushing capacities and the desired product quality can be precisely determined by using the Bond Index test methods Using the Bond Index test procedures it is possible to calculate crushing / abrasion behavior of mineral sampl This knowledge is essential to define the required ball mill layout and .

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where W is the work input (kWh/t); Wi is the work index (kWh/t) which expresses the resistance of the material to crushing and grinding; and F80 and P80 are the 80% passing size of the feed and the product ( m), respectively Bond developed a standard laboratory test for the determination of the work index for ball and rod mills in

terms The index is defined as the energy required to crush from infinite size down to 100 µm, hence the 10 inside the brackets Bond's Work Index values, in kWh per short ton: ie 2000 lbs or 907 kg, roughly follow the Moh's scale of hardness, see Table 111 In Summary, Kick's law ,

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bonds crushing law and work inde fdp; FM 306: SIZE REDUCTION AND SIEVING FM 306: SIZE REDUCTION AND SIEVING , Bonds law is often written in terms of the work index (Wi) as, Where the work index is defined as the energy required per unit mass in kWh/ton to reduce an infinitely large particles to D80 = 100 μm

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CHAPTER 20: SIZE REDUCTION – EQUIPMENT FOR SIZE REDUCTION, CARE AND MAINTENANCE , Bond’s law • The work required to form particles of size Dp from very large feed is proportional to the , • Speed of crushing ranges between 125 to 425 gyrations per minute

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