##### CPE: Lesson 15. Empirical laws of Size Reduction

The Bond Work Index is material specific and is obtained from laboratory crushing tests on the feed material. Hard and brittle materials have a work index in the range 4 × 10 4 − 8 × 10 4 J/kg. Bond''s law holds reasonably well for a variety of materials undergoing coarse, medium and fine size reduction. (Eq. 14.3a) can also be reduced to

##### calculations bonds law for crushing

The work index in Bond''s law for crushing of solids has. The work index in Bond''s law for crushing of solids has the following dimensions a) No units (dimensionless) b) KWh/ton c) KW/ton d) KWh.m 1/2 /ton. Chemical Engineering Stop: Bond''s law. May 14, 2010· Where Kb is a constant that depends on the type of machine and on the material being ...

##### CHAPTER 11 SIZE REDUCTION

2019-2-24 · is called the crushing strength of the material, we have: dE/dL = -K K f c L 1 which, on integration gives: E = K K f c ln(L 1 /L 2) (11.2) Equation (11.2) is a statement of Kick''s Law. It implies that the specific energy required to crush a material, for example from 10cm down to 5cm, is the same as the energy required to

##### Bond crushing law

Bond crushing law. A. Calls for relatively less energy for the smaller product particles, than does the Rittinger law B. Is less realistic in estimating the power requirements of commercial crushers. C. States that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product

##### Bond Work Index

The Bond work index ( Bond, 1960) is based on Bond''s law, which states that the energy consumed is proportional to the 1.5 power of particle size rather than the square of Rittinger''s law. Accordingly, the energy consumed in reducing the particle size from x F to x p (both measured as 80% undersize) is given by.

##### Bond crushing law?

Bond crushing law_____? A. Calls for relatively less energy for the smaller product particles, than does the Rittinger law B. Is less realistic in estimating the power requirements of commercial crushers. C. States that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of t

##### what is bond s law of crushing

Rittinger''s theory and law of the energy expended in crushing of .. of the weaker bonds, and the particles thus formed are free to resume their determination of the bond''s work index of baban… Keywords: Grindability, comminution, energy, mineral, comparative The Bond work index Wi is used as a measure of grindability of an ore (Deniz, 2003;.

##### 5 Size Reduction and Sieve Analysis

power required for crushing and grinding was proposed by Bond in 1952. Bond postulated that the work required to form particles of size D P from very large feed is proportional to the square root of the surface-to-volume ratio of the product. Bond Crushing Law and Work Index 𝐸=𝐾𝐵 1 𝑋2 Bond proposed the E i as the work index. E i is ...

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##### Solved subject:Particle Technology Derive the Rittinger''s ...

Derive the Rittinger''s law, Kick''s law and Bond crushing law by putting the different values of P in the Empirical Relationships for Crushing? Show transcribed image text Expert Answer. Who are the experts? Experts are tested by Chegg as specialists in their subject area. We review their content and use your feedback to keep the quality high.

##### Bond Crushing Work Index Of Copper Slag-Crusher

Bond Crushing Law In Ball Mill. Bond crushing law in ball mill bond work index formulaequation basic equationssize distribution and exposure ratioequations for work index variationswork index and crack energy the basic work index equation isw 10 wip 10 wif1where w is the work input required in kilowatt hours per short ton to grind from 80 ...

##### Relationships between comminution J energy and …

2015-4-16 · The general form of Bond''s equation is as follows: [6] 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

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##### How Material Size Directly Affects Size Reduction Energy ...

2015-3-25 · Bond''s Law: The work required to form particles from very large feed is proportional to the square root of the surface-to-volume ratio. E = K B f c [(1/L 2) 1/2 - (1/L 1) 1/2] Rittinger''s Law — The energy required for reduction in particle …

##### Rittinger

The Bond work index (Bond, 1960) is based on Bond''s law, which states that the energy consumed is proportional to the 1.5 power of particle size rather than the square of Rittinger''s law. Accordingly, the energy consumed in reducing the particle size from x F to x p (both measured as 80% undersize) is given by

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##### Bond F C Crushing And Grinding Calculations Allis …

Bond F C Crushing And Grinding Calculations Allis Chalmers Tech Gravel Sceening Machine. bond f c crushing and grinding calculations. bond f c crushing and grinding calculations Hammer Crusher Hammer crushers key part is the rotor with hammer Rotor is composed of principal axis disk pin roll and hammer Motor drives rotor rotating in the crushing cavity material will be taken …

##### Bond Work Index Formula-Equation

The Bond work index ( Bond, 1960) is based on Bond''s law, which states that the energy consumed is proportional to the 1.5 power of particle size rather than the square of Rittinger''s law. Accordingly, the energy consumed in reducing the particle size from x F to x p (both measured as 80% undersize) is given by.