Rittinger Law Specific Grinding

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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

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

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

Jun 01, 1973 CONCLUSION Two distinct forms of the empirical general law of grinding exist: first, - dx dE= =CI where or -t - so dP(x, t) 1/Ji xn_ I 0 n I log (x/xe) _ -'.__ log (x/x,) dP (x, t), rI = I When n=1, this is Kick's law, when n=2 it is Rittinger's law, and integration gives r x~ E Ln-II 1[f 0 (1/x I)dP(x, t) ma or s~a~ (1/xn-I)dP(x, 0)] , rtr 1 (6a) 0 xmn= E= CI b log(x/xo)dPlx, t) 0 . log (x/xo) dP (x, 0)1 n =I

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Unit Operations in Food Processing - R. L. Earle

Unit Operations in Food Processing - R. L. Earle

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 mm. 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

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Rittinger Law Specific Wet Ball Mill

Rittinger Law Specific Wet Ball Mill

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 particles from 10 cm to 5 cm would be the same as that required to reduce for example the same mass of 5

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Unit OperatiOn Size Reduction

Unit OperatiOn Size Reduction

In the grinding process, materials are reduced in size by fracturing them. In the process, the material is stressed by the ... A Rittinger's Law (2) As the specific surface of a particle (the surface area per unit mass) is proportional to 1/L, equation (2) postulates that the ... Rittinger's Law fits the experimental data better. 3) Bond has

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rittingers law fine grinding

rittingers law fine grinding

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

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(PDF) Comminution energetics part III : Bond's law and

(PDF) Comminution energetics part III : Bond's law and

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

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A Physical Explanation of the Empirical Laws of Comminution

A Physical Explanation of the Empirical Laws of Comminution

Nov 14, 2020 Investigators using Rittinger’s law have found that crushing efficiencies are generally extremely low. Some data of Martin who crushed quartz in an 18 x 18-in. tube ball mill using 1-in. diam balls are shown in Table I. In addition to comminution there is a second grinding process practiced on a wide industrial scale

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How Material Size Directly Affects Size Reduction Energy

How Material Size Directly Affects Size Reduction Energy

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

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Influence of wood pellets properties on their grinding

Influence of wood pellets properties on their grinding

Jun 09, 2021 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

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How it Works: Crushers, Grinding Mills and Pulverizers

How it Works: Crushers, Grinding Mills and Pulverizers

Jun 02, 2017 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

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Evolution of grinding energy and particle size during dry

Evolution of grinding energy and particle size during dry

Oct 01, 2020 Several comminution laws have been proposed to link the consumed energy to a characteristic particle size of the powder. The popular models are those of Rittinger , Bond and Kick . While the Bond and Kick models are mostly employed for coarse and intermediate size grinding, the Rittinger model is better suited for fine comminution

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(PDF) Development of Size Reduction Equations for

(PDF) Development of Size Reduction Equations for

Specific energy vs. Rittinger’s gr inding law parameter for the data from this study, and th ose extracted from Mani et al. (2 004), Bi tra et al. (2009), and Adapa et al. ( 2011). Figure 8

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size reduction,laws involved in size reduction

size reduction,laws involved in size reduction

Oct 25, 2016 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

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Effect of Moisture Content on the Grinding Process and

Effect of Moisture Content on the Grinding Process and

Grinding is a staple size-reduction process to produce food powders in which the powdered form is chemically and microbiologically stable and convenient to use as end products or intermediate products. The moisture content of food materials before grinding is a particularly important factor, since it determines the materials’ physical properties and the powder properties, such as flowability

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(PDF) Development of size reduction equations for

(PDF) Development of size reduction equations for

Rittinger constant for grinding pine chips by hammer mill is ... Are scaling laws on stre ngth of solids. related to mecha nics ... Experimental study on specific grinding energy and particle size

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Energy consumption of two-stage fine grinding of Douglas

Energy consumption of two-stage fine grinding of Douglas

Mar 12, 2018 Figure 7 shows Rittinger’s comminution law fitting to the data of three feed sizes and nineteen product sizes and corresponding SECs from rotor impact mill grinding. The Rittinger constant of 104.5 for the rotor impact mill grinding is larger than 58.6 for the hammer mill grinding (Fig. 5), indicating that the hammer mill used less energy

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(PPT) Size Reduction | zerp daf

(PPT) Size Reduction | zerp daf

K=KRfc and so dE/dL = KRfcL-2 where KR is called Rittinger's constant, and integrate the resulting form of eqn. (3.1), we obtain: E = KRfc(1/L2 – 1/L1) (3.3) ENERGY USED IN GRINDING- RITTINGER’S LAW As the specific surface of a particle, the surface area per unit mass, is proportional to 1/L. Eqn. (3.3) postulates that the energy required

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