How to calculate the power for a stone crusher which …
You can calculate power required by the bonds law of crushing. For more about the bonds law, see the link below
Chapter 6 Comminution
crushing is proportional to the area of new surface produced. Rittinger's theory has gained significant traction within the scientific community because it is supported …
crusher/sbm bonds law for crushing mills.md at master
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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
Based on bonds crushing law the power required to
View full document. • Based on Bond's Crushing Law, the power required to crush a certain material will change by % if the diameter of the product is made smaller by 50%. • In crushing a certain ore, the feed is such 80% is less than 50.8 mm in size and the product size is such that 80% is less than 6.35 mm. The power required is 89.5 kW.
4. SIZE REDUCTION
This law, named after Rittinger, is best suited for grinding rather than crushing. In case of crushing a classical law known as Kick's law is best suited: P = 𝑚̇𝐾 log 𝐴𝑤2 𝐴𝑤1 (4.4) A more useful relation that can be used for both crushing and grinding has been obtained by …
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sbm/sbm bajar bond f c crushing and grinding calculations…
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How Material Size Directly Affects Size Reduction Energy
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 = KBfc [ (1/L2)1/2- (1/L1)1/2] Rittinger's Law — The energy required for reduction in particle size of a solid is directly proportional to the increase in surface area. E = KRfc(1/L2– 1/L1)
CHAPTER 11 SIZE REDUCTION
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 crush the same material from 5mm to 2.5 mm. Rittinger, on the other hand, assumed that the energy required for size reduction is directly
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
BOND'S WORK INDEX: WHAT IT IS AND WHAT IT ISN'T
The most common form of this relationship is given as Equation 1, and is often referred to as "Bond's equation" or "Bond's law." E=10×. √P. −. √ F. 80 80 ) ( 1 ) Where: E is the …
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
CRUSHING LAWS. Content Crushing laws Rittinger law Kick's law Bond…
Von Rittinger's law (1867): It states that the energy consumed in the size reduction is proportional to the area of new surface generated. putting p = −2, then integration gives: Writing C = KRfc. fc is the crushing strength of the material.L2 & L1 are the final and initial particle sizes.KR is the Rittinger's constant.
Chapter 6 Comminution
crushing is proportional to the area of new surface produced. Rittinger's theory has gained significant traction within the scientific community because it is supported thermodynamically by the transfer of strain energy to bond potential energy on the surface of the material. The surface of a material has a higher energy state than the
calculations bonds law for crushing
calculations bonds law for crushing T01:08:17+00:00 Bond FC, 1961 Crushing and Grinding Calculations Title: Bond FC, 1961 Crushing and Grinding Calculationspdf Author: can Created Date: 4/2/2009 4:00:03 PM Kick's law is: "The energy required for producing analogous changes of configuration of geometrically similar …
Solved 1. Bond's formula is a useful tool when comparing
Chemical Engineering questions and answers. 1. Bond's formula is a useful tool when comparing crushing applications as well as grinding applications. In crushing energy calculations, a crushability index (impact work index) as determined by laboratory tests is used. Now consider a certain material being crushed in two different size ranges, a ...
A commentary on the Kick, Bond and Rittinger laws …
There are three well-known comminution laws to calculate the crushing energy of rock, as shown in Table 1. These three laws apply different hypotheses that …
A new approach to the calculation of bond work index
The Bond work index (BWI) is a well-known method used when selecting comminution equipment, to evaluate the grinding efficiency and to calculate the required grinding power. ... Crushing and grinding calculation part I and II. Brit. Chem. Eng. 6 (6 and 8). 378–385 & 543–548. Google Scholar. Chandar et al., 2016. R.K. Chandar, N.S. …
(Solved)
answer below ». A.A continuous grinder obeying the Bond crushing law grinds a solid at the rate of800 kg/h from the initial diameter of 12 mm to the final diameter of 2 mm. If it is required to produce particles of 1-mm size, what would be the output rate of the grinder (in kg/h) for the same power input? 470.32 kg/h.
CHAPTER 20: SIZE REDUCTION – EQUIPMENT FOR SIZE …
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calculating crushing nstant using bond
T07:10:20+00:00 bond f c 1962 crushing and grinding calculations. More Info calculating crushing constant using bond s law crushing and grinding Get Price (PDF) Effect of circulating load and classification efficiency 2014/10/20 The effect of circulating load and classification efficiency on the performance of ball mill circuits is compared to the …
A commentary on the Kick, Bond and Rittinger laws of grinding
The calculation of the Bond Equation requires the Bond Index, which is estimated through the results of the locked-cycle grinding tests. However, the tests are time-consuming, labor-intensive, and sensitive to errors. ... There are three well-known comminution laws to calculate the crushing energy of rock, as shown in Table 1. ...
SOLUTIONS TO CHAPTER 12: SIZE REDUCTION EXERCISE …
EXERCISE 12.1. a) Rittinger's energy law postulated that the energy expended in crushing is proportional to the area of new surface created. Derive an expression relating the specific energy consumption in reducing the size of particles from x1 to x2 according to this law. b) Table 12.1.1 below gives values of specific rates of breakage and ...
Rittinger and Kick's Laws of Crushing
Hence W = constant x P. That is to say, the work done, in crushing a given weight of ore from any one stage to the next, would, from this reasoning, be proportional to the number of particles at the first of these two stages. If this were actually the case, the law deduced would give, with the finer sizes, extremely large work values, even ...
Solved 3. a) A continuous grinder obeying Bond Crushing law …
a) A continuous grinder obeying Bond Crushing law | Chegg. 3. a) A continuous grinder obeying Bond Crushing law grinds a solid at the rate of 1000 Kg/hr from the initial diameter of 10 mm to the final diameter of 1 mm. If the market now demands product particles of size 0.5 mm, what will be the output rate of the grinder for the same power ...
A quick method for bond work index approximate value determination
A quick procedure with two grinding cycles for the determination of the Bond. work index approximate value is exactly the same as in the first two grinding cycles of. the standard Bond test and ...
calculations bonds law for crushing
Calculations involving Bond's work index are generally divided into steps with a different Wi determination for each size class The low energy crushing work index laboratory test is conducted on ore specimens larger than 50 mm, determining the crushing work index (Wi C, CWi or IWi (impact work index)) bonds crushing law and work index china ...
A new approach to the calculation of bond work …
Crushing and grindability are the parameters that characterize the resistance of raw materials to crushing. There are several procedures for determining the …
bonds crushing law
Download the Android app. • Based on Bond's Crushing Law, the power required to crush a certain material will change by % if the diameter of the product is made smaller by 50%. • In crushing a certain ore, the feed is such 80% is less than 50.8 mm in size and the product size is such that 80% is less than 6.35 mm.