The correct energy surface area balance of Rittinger's law in terms of particle sizes is E =K ~O"'n= (1/x)dP (x,t) - [omn= (1/x)dP (x, 0)J 771 where P (x, t) is the fraction by weight less than size x of products of fracture, P (x, 0) is the starting material.

Bond has proposed a law intermediate between Rittinger's and kick's law for estimating the power required for crushing and grinding operations. Bond postulated that work required to form particles of size D p from the very large feed is proportional to the square root of the surface-to-volume ratio of the product, S p /V p.

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 =reduced length. Kick's Law states that …

Hydrometallurgists must regret to see Rittinger's law disproved, for surface exposed is, in general, a measure of the accessibility of solutions …

For the grinding of coarse particles wherein the increase in surface area per unit, mass is relatively small, Kick's Law is a reasonable approximation. For size reduction of fine powders where large areas of new surfaces are being created better fits Rittinger's Law.

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:

grinding laws of coal roller mill. 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.

Three grinding laws of Kick, Rittinger, ... (Kick, Rittinger, and Bond) to the grinding of lignocellulosic biomass in order to estimate the needed energy input to obtain a specific reduction in size.

Rittinger and Kick's Laws of Crushing. 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 …

Slide 7. Von Rittingers 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 = K R f c f c is the crushing strength of the material. L 2 & L 1 are the final and initial particle sizes. K R is the Rittingers constant.

Discusses the three laws of comminution, namely the Rittinger's law, the Kick's law and the Bond's law, and the general formulation by Walker et al. Also dis...

reduction ratio and Verification of Rittinger's law of Crushing. 13-15 6 Crushing of Ore in a roll crusher, and Determination of average size by sieving. 16-18 7 To determine the reduction ratio, theoretical capacity, and actual capacity of a roll crusher. 19-21 8 To study the effect of grinding with grinding time in Ball mill. 22-25 9

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 …

Rittinger And Kick's Laws Of Crushing. Mar 08, 2016 Rittinger and Kick's Laws of Crushing. 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 separa tions.

Von Rittinger for d < 0.05 mm with W as grinding work in kJ/kg, c as grinding coefficient, dA as grain size of the source material and dE as grain size of the ground material. A reliable value for the grain sizes dA and dE is d80. This value signifies that 80% (mass) of the solid matter has a smaller grain size.

However,equations Rittinger's law and Bond's law were developed from studies of hard materials (coal and limestone) and deviation from predicted results is likely with many foods. 15. Basic parts of mill • Feed chute/hopper, which delivers the material. • Grinding mechanism usually consisting of a rotor and stator.

Rittinger law specific grinding - seadoone.co.za. laws laws of crushing and grinding - latourdebebellebe. grinding and crushing laws limestone grinding ball mill construction process - Inof First the size of big block limestone grinding,grinding stone size for ball, Contact Supplier rittinger law specific grinding. Get More Info;

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 size of a solid is directly proportional to the increase in surface area. E = K R f c (1/L 2 – 1/L 1)

Rittinger law specific grinding. All the three classical laws of grinding (Kick's, Rittinger's and Bond's), The Bond law of grinding has been widely used for mill sizing and design Food. Read more. Grinding Studies of Mango Ginger: Mathematical.

A commentary on the Kick, Bond and Rittinger laws of grinding. 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 ...

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 ...

How it Works: Crushers, Grinding Mills and Pulverizers ... 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 =reduced length. Kick's Law states that the energy is proportional to the size reduction ratio.

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Grinding And Crushing Laws. Mar 08 2016 Rittinger and Kicks Laws of Crushing 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 separa tions

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.

rittinger law specific grinding mc machinery unit operations in food is called rittinger's constant, and integrate the resulting form of eqn. (11.1) Grinding Characteristics Of Asian Originated Peanuts

Equation (11.2) is a statement of Kicks 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

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 …

rittingers law fine grinding Mar 25, 2015 Rittingers 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 ) Kicks 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.

Bond in his "Third Theory of Comminution" criticises both Rittinger's and Kick's laws and suggests a generalised equation for the energy of crushing. dE/dL= -K4/2L^n. The exponent n is obviously unity in the case of Kick's law and two for Rittinger's law. Bond, however, uses an exponent value of one and half, which integrates to give

Rittinger and Kicks Laws of Crushing. Mar 08 2016 Rittinger and Kicks Laws of Crushing. 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 separa tions .