Rittinger's law is applicable mainly to that part of the process where new surface is being created and holds most accurately for fine grinding where the increase in surface per unit mass of material is large. Kick's law, more closely relates to the energy required to effect elastic deformation before fracture occurs, and is more accurate than ...
The Law Specifically Grinding Rittinger. grinding and crushing laws rittinger law of grindingriver aggregates jaw crusher. Bond s Law For Crushing Mills ebrainzorgin bond039s law for crushing units such as crushers and grinding mills is ore s work index Details. rittinger law.Ball Grinding Mill Modeling Equations In Saudi Arabia. 3023 ball mill ...
is called Rittinger's constant, and integrate the resulting form of eqn. (11.1), we obtain: E = K R f c (1/L 2 – 1/L 1) (11.3) Equation (11.3) is known as Rittinger's Law. As the specific surface of a particle (the surface area per unit mass) is proportional to 1/L, eqn. (11.3) postulates that the energy required to
2.14 Size ranges applicable to Von Rittinger, Kick, and Bond equations . laws to primary crushing equipment processing large particle feed sizes is. Bond F.C., 1961. Crushing and Grinding…. Hydrocone crusher lor tertiary crushing 01 Semi-Taconite are (specular hematite). It follows a power law defined by the GATES-GAUDIN-SCHUHMANN.
The lab-scale disc mill and the application of Von Rittinger's comminution law provide a quick assessment of the relative grindability (i.e., the ease of grinding) of wood pellets. Further grinding studies should focus on the grinding behavior of pellets made of bark and wood blends (i.e., softwood and hardwood).
the latter part of the 19th century (von Rittinger, 1867; Kick, 1885) throughout the 20th century (Bond, 1952; Charles, 1957), and even more recently (Morrell, 2004). These different approaches have one thing in common: they use a single number to describe energy in grinding. This number, the specific energy, is the ratio between the
• Grinding of coarse particles in which the increase in surface area per unit mass is relatively small, Kick's Law is a reasonable approximation • Rittinger's law – States that the energy required for size reduction is proportional to the change in surface area of the pieces of food • E = K R 1 1 D. p. D. f • K. R ...
In fine grinding range such as grinding of cement etc. Rittinger's law is applicable. The slope of the curve would be approximately-1, 71 100 0 100 UO 0 Cr, 10 Fig. 1 Compiled logarith- mic presentation of specific surface production against net energy input. 1 10 100 • 1000 10000 log kW h/t 0 001 p. 0 r4 10A 0 04, 100;4
Rittinger's law states that the energy required for fracture, E F, is proportional to the new surface produced: E F =C R (S f –S i ), where S i and S f are the initial and final sp1234567890ecific...
• Coarse grinding has RRs below 8:1 • Fine grinding can exceed 100:1 • Grinding of coarse particles in which the increase in surface area per unit mass is relatively small, Kick's Law is a reasonable approximation • Rittinger's law States that the energy required for
GRINDING LAWS The three laws of Rittinger, Kick and Bond can all be derived from the follow- ing relationship, proposed by Charles (1957), between energy consumed and mate- rial size C.51 : &=-kg Yn Setting the exponent n to 1, 11 or 2 upon integration defines the laws of Kick, Bond and Rittinger respectively.
In Summary, Kick's law is better for larger particles and Rittinger's for fine grinding, see Figure11.5. Large particles are easier to break than smaller ones as they have more cracks and faults. Often the laws are used in conjunction with empirically given constants: it can be dangerous to use the book values without some test work.
home; rittinger law specific grinding; rittinger law specific grinding. Rittinger Law Specific Grinding Mc Machinery Unit Operations in Food Processing R L Earle 20190224 Equation 113 is known as Rittingers Law As the specific surface of a particle the surface area per unit mass is proportional to 1L eqn 113 postulates that the energy required to reduce L for a mass of …
Rittinger's law: work required in crushing is proportional to the new surface created P = power required P m. K r 1 D sb 1 D sa a= feed rate m Ý = volume-surface mean dia. of feed & product, respectively D sa,D sb K r = Rittinger's coefficient K r 6e s c m p 1 b 1
• Comminution is accomplished by a sequence of crushing and grinding processes. ... • Rittinger's law ... where, E is the energy input, is the product particle size, is the feed particle size and K is a constant. • The law applies in the range 10-1000 m i.e. fine grain range • …
Rittinger's Law (1867) Rittinger considered that for the grinding of solids, the energy required should be proportional to the new surface produced and put n = 2 Therefore dE/dx = - K/x² Integrating ∫ dE = - K ∫ 1/x². dx E = K [1/x 2 – 1/x 1]
Rittinger's law states that the energy required for fracture, E F, is proportional to the new surface produced: E F =C R (S f –S i ), where S i and S f are the initial and final ...
What is rittinger's law formula? Equation (11.3) is known as Rittinger's Law. As the specific surface of a particle, the surface area per unit mass, is proportional to 1/L, eqn. This is a very much smaller reduction, in terms of energy per unit mass for the smaller particles, than that predicted by Kick's Law.
It has been found, experimentally, that for the grinding of coarse particles in which the increase in surface area per unit mass is relatively small, Kick's Law is a reasonable approximation. For the size reduction of fine powders, on the other hand, in which large areas of new surface are being created, Rittinger's Law fits
For the size reduction of fine powders-in which large areas of new surface are being created, Rittinger's Law fits the experimental data better. fENERGY USED IN GRINDING- BOND'S LAW Bond has suggested an intermediate course, in which he postulates that n is -3/2 and this leads to: E = Ei (100/L2)1/2 [1 - (1/q1/2)] (3.4) Bond defines the ...
It has been found, experimentally, that for the grinding of coarse particles in which the increase in surface area per unit mass is relatively small, Kick's Law is a reasonable approximation. For the size reduction of fine powders, on the other hand, in which large areas of new surface are being created, Rittinger's Law fits the experimental ...
Rittinger's law has been found to hold better for fine grinding, where a large increase in surface results. It suggests that the energy required is proportional to the increase in surface area per unit mass. 15.2 Kick's law. Kick state that the energy required for a given size reduction was proportional to the sizen reduction ratio, and ...
Which of the following crushing laws is most accurately applicable to the fine grinding of materials ? A. Bond's crushing law. B. Kick's law. C. Rittinger's law. D.
Which of the following crushing laws is most accurately applicable to the fine grinding of materials? (A) Bond's crushing law (B) Kick's law (C) Rittinger's law (D) None of these Last Answer : (C) Rittinger's law Show Answer
Confusion concerning the so-called general law of grinding proposed by Walker et al. is removed when it is realised that two forms of the law exist, quite different in physical meaning. The Kick and Rittinger laws are special cases of one form, and Bonds law is a special case of the other. Thus it is possible for Rittinger's and Bond's laws to ...
The force applied is limited because new particles are released following Rittinger's Law (energy required is proportional to increase in surface area). ... In grinding equipment, the dominant method of stress application is governed by the equipment design. ... Sometimes we want to avoid these modes of external stress — specifically to ...
5% of ALL electricity generated is used for grinding Efficiency of grinding processes 1-5% Unfortunately models available too empirical. Three postulates for predicting energy requirements: Rittinger, kick, Bond Highly empirical Varying levels of success.
Assume that Rittinger'slaw is applicable. •It is desired to crush 10 ton/hr of iron ore hematite. The size of the feed is such that 80% passes a 72.6 mm screen, and 80% of product a 3.175mm screen. Calculate the gross power requirement for wet grinding and dry grinding. Work index of Hematite is 12.68 [Ans 17.96kW]
Rittinger's law is E cc fresh surface area produced (2) It is clear that if we started with particles all of size x and performed any kind of breakage, differential or not, the fresh surface produced must include that of all mass, notjust the major pieces remaining.
Rittinger's theory is the law of the cracks. It is well explained in an article by E. A. Hersam in the Mining and Scientific Press, an abstract of which is given in the third volume of Richard's Ore Dressing, and to which I acknowledge my indebtedness for some of my ideas and,methods. The mathematics of this theory follow:
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