I happen to be one of those who believe that Rittinger probably meant what he said when he wrote what Stadler has quoted, "the increase of the surfaces exposed is directly proportional to the force required for reducing" "and therefore also to the work absorbed in effecting the separations." (The italics are now mine instead of Rittinger's or Stadler's.) Our difficulty lies in .

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 .

Chemical Engineering Stop: Rittinger's and Kick's laws. 2010-05-14 Rittinger's and Kick's laws Rittinger's law states that work required in crushing is proportional to the new surface created. In other words, crushing efficiency is constant and for a given machine and feed material is independent of the sizes of feed and product.

, Rittinger, in 1939, obtained the following equation to predict the power required in crushing and grinding operations: ) 1 1. (2 1. vs vs r D P m K (4.3) Where 1 and 2 denote feed and product respectively. This law, named after Rittinger, is best suited for grinding rather than crushing.

•To increase the specific surface area •To produce particles of certain size/shape . Rittinger [s law, b)Kicks law and c)Bonds Law 20. Predicting Energy Requirements Rittinger: C R . •Use wet grinding (good heat transfer, liquid may serve a heat sink)

Sep 05, 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 discussed. Applicability in terms of feed .

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 processes. 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 .

Mar 25, 2015 · Rittinger's Law — The energy required for reduction in particle size of a solid is directly proportional to the increase in surface area. E = K R f c (1/L 2 – 1/L 1 ) Kick's Law — The amount of energy required to crush a given quantity of material to a specified fraction of its original size is the same, regardless of the original size.

Oct 10, 2014 · • Bond has suggested a law intermediate between Rittinger's and Kick's laws, by putting p = −3/2 in the general equation: • Writing C = 5Ei then: • Bond terms Ei the work index, and expresses it as the amount of energy required to reduce unit mass of material from an infinite particle size to a size L2 of 100 μm, that is q =∞. 7.

Rittinger an overview ScienceDirect Topics. Neither of these two laws permits an accurate calculation of the energy requirements. 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.

simple terms, Rittinger's law is a high-end estimate of the energy. required to grind something, excluding any losses to heat etc. Kick's law is a low-end estimate, and Bond's Law is a mid-way .

Von Rittinger states that the specific energy E m (energy by unit of mass) is directly proportional to the creation of the specific surface area (see Equation (1)) with K r a constant depending both on the material to grind and the mill, and S p 1 and S p 2 the specific surfaces of .

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 reduce L for a mass of particles from 10 cm to 5 cm would be the same as that required to reduce, for example, the same mass of 5 mm particles down to 4.7 .

Rittinger's theory and law of the energy expended in crushing of rock is that the work of crushing is proportional to the reduction in diameter; or, as I have more fully expressed it: "The work done in crushing is proportional to the surface exposed by the operation; or, better expressed for this purpose, the work done on a given mass of rock is proportional to the reciprocal of the .

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.

where E is the net specific energy; x f and x p are the feed and product size indices, respectively, and K 2 is a constant. Bond (1952) proposed the 'Third Law' of grinding. The Third Law states that the net energy required in comminution is proportional to the total length of .

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 .

Grinding laws namely Kick's, Rittinger's and Bond's law were applied. The grinding constants (K-K, K-R, W-I) for different laws reflected the dependency on grinding duration.

(2013). Grinding of Coriander Seeds: Modeling of Particle Size Distribution and Energy Studies. Particulate Science and Technology: Vol. 31, No. 5, pp. 449-457.

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 more details rittinger law specific grinding.

Oct 25, 2016 · size reduction,laws involved in size reduction,application & mills 1. SIZE REDUCTION Size reduction is the process of reducing the particle size of a substance to a finer state of subdivision to smaller pieces to coarse particles or to powder. Size reduction process is also referred to as comminution and grinding.

grinding ultra grinding crushing ⇒ Equivalent diameter of a particle is the diameter of the sphere having the same ratio of surface to volume as the actual volume. ratio of volume to surface as the particle. volume as the particle. none of these. ⇒ In case of a revolving mill, wet grinding compared to dry grinding requires more energy. has .

Chapter 12 Comminution Energy and Evaluation in Fine Grinding . energy including Rittinger's law Kick's law Bond's law, and Holmes's law. . grinding force vs. the specific material removal .

Unit OperatiOn Lecturer . Shymaa Ali Hameed 2013-2014 . Energy for Size reduction For efficient grinding, the energy applied to the material should exceed, by as small a margin as possible, the minimum energy . A Rittinger's Law (2) As the specific surface of a particle (the surface area per unit

Relationships between comminution energy and product size for a magnetite ore [4] where E is the net specific energy; x f and x p are the feed and product size indices, respectively, and K3 is a constant. Hukki (1962) evaluated these energy-size relationships

analysis using existing Kick's, Rittinger's, and Bond's laws, a linear model was developed to fit the test data in regard to relating specific energy with initial and final fibre lengths. The model performed well for specific energy estimations, especially for the case under 200 g feeding mass. Keywords: hemp, decortication,

Several theories for the science of size reduction have been developed, including Rittinger's Law, Kick's Law, and Bond's Law. 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 .

(2013). Grinding of Coriander Seeds: Modeling of Particle Size Distribution and Energy Studies. Particulate Science and Technology: Vol. 31, No. 5, pp. 449-457.

Parboiled rice required longer duration of grinding compared to raw rice, consequently specific energy consumption was higher (~220kJ/kg). All the three classical laws of grinding (Kick's, Rittinger's and Bond's) seemed to be applicable while Rittinger's law showed better suitability than the other two followed by Bond's law.

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:

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