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 in size reduction is proportional to the new surface created by the particle fragmentation. The equation for Rittinger's Law can be written as: E = K R f c (1/L 2 – 1/L 1) Where: E=Energy, K R =Rittinger's Constant, f c =crushing strength of the material, L 1 =initial length, and L 2 ...
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.
Equation (6.7) is known as 'Rittinger's law'. Due to the inaccuracy of the assumptions on which it is based and the difficulty in determining its parameters, Rittinger's law is only approximate. A different expression for energy requirement of size reduction has been proposed by Kick.
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.
View 3minution.ppt from METE 111 at Mindanao State University - Iligan Institute of Technology. Comminution Rittinger's, Kick's and Bond's Laws Crushing and …
Application: Rittinger's law gives better results with fine grinding where there is a much greater increase in surface area 2.5.3 Bond's Law This law states that energy used for size ...
Definition, objectives of size reduction and size separation, factors affecting size reduction, laws governing energy and power requirements of mills including ball mill, hammer mill, fluid energy mill etc., sieve analysis, standards of sieves, size separation equipment shaking and vibrating screens, gyratory screens, cyclone separator, air separator, bag filters, cottrell precipitator ...
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.
and over 150 batch grinding tests and sieve sizing were carried out. Throughout the grinding tests, power draw was continuously monitored. The relationship between the grinding energy and product size was analysed using the conventional energy-size concepts. It was found that the Rittinger equation fits the experi-mental data well.
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 ...
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 ...
• 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 ...
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
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 ...
15.1 Rittinger's law Rittinger's assumption was based on the fact that particles do not deform before breaking, therefore being infinitely brittle.Rittinger state that the energy required in size reduction is proportional to new surface created and gave the power n a value of 2 thus by integrating equation (1.9) obtained the so called Rittinger's law:
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 ...
(A) Rittinger's law (B) Kick's law (C) Bond's law (D) None of these Which of the following gives the work required for size reduction of coal to -200 mesh in a ball mill most accurately? Last Answer : (A) Rittinger's law
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
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 …
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 relationship between the comminution energy and the product size obtained for a given feed size has been a researched extensively over the last century. Theoretical and empirical energy-size reduction equations were proposed by Rittinger (1867), Kick (1885) and Bond (1952), known as the three theories of comminution; and their general formulation by Walker et al. (1937).
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 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 ...
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.
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: 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
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:
• 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
