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rittinger law specific grinding

CPE: Lesson 15. Empirical laws of Size Reduction

15.1 Rittinger''s law ... 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. ... The Bond Work Index is material specific and is obtained from laboratory crushing tests on the feed material.

Effect of specific energy consumption on fineness of ...

 · A comprehensive research project was undertaken to evaluate the effect of specific energy consumption (Ec) on variations of portland cement fineness measured by the Blaine test and sieve analysis. Amine and glycol-based grinding aids (GA) were incorporated at various concentrations of 0.04, 0.06, and 0.08% of the cement weight. At Ec values lower than around 20 kWh/ton, test …

Rittinger''s law | Article about Rittinger''s law by The ...

Rittinger''s law. The law that energy needed to reduce the size of a solid particle is directly proportional to the resultant increase in surface area. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster''s page for free fun content .

Energy requirements in size reduction of solids

law of Kick. The slope of cumulative curve varies from m = 0 to m 0.1. the range of coarse grinding is the range of Bond''s theory, (rn = — 0.5) and the range of fine grinding is the range of Rittinger''s theory ( m = — 1.0 ). - the range of fine grinding from m = —1 to — 3, — the range of approaching grinding …

Laws Related To The Grinding Mill And Blending

Mill (grinding) Wikipedia. Grinding laws In spite of a great,To calculate the KICK''s and Rittinger''s coefficients following formulas can be used,Grinding degree referring to specific . laws related to the grinding mill and blending. Rittinger Law Of Grinding rizecoin Crushing Plants Grinding Mill,Bond and Rittinger laws ofget price

SIZE REDUCTION AND SIZE SEPARATION

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 ...

11 Crushing and classification

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.

Food Engineering: Lesson 43. SIZE REDUCTION

Where x 1 is the average initial size of the feed particles, x 2 is the average sizeof the product particles, E is the energy per unit mass required to produce this increase in surface area and K is a constant, known as Rittinger''s constant. Rittinger''s law has been found to hold better for fine grinding.

3 minution.ppt

View 3 minution.ppt from METE 111 at Mindanao State University - Iligan Institute of Technology. Comminution Rittinger''s, Kick''s and Bond''s Laws Crushing and Grinding Variations of Particle

Size reduction equipment

Rittinger assumed that the energy required for size reduction is directly proportional to the change in surface area, and not to the change in length. He considered that for the grinding of solids, the energy required should be proportional to the new surface produced, assigning the value of 2 to the power n, and obtaining the Rittinger''s law ...

(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 ...

Influence of wood pellets properties on their grinding ...

 · 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 …

How it Works: Crushers, Grinding Mills and Pulverizers ...

 · 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 ...

A Physical Explanation of the Empirical Laws of Comminution

 · 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.

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 ...

CHAPTER 20: SIZE REDUCTION – EQUIPMENT FOR SIZE …

• 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 • …

Most famous Metallurgists in history

He introduced the Rittinger''s Law, which related the work done in crushing to the new area of the surface created by a proportional equation. He left numerous publications to his special field, mineral processing. In 1867 Peter R von Rittinger published the Textbook of the Processing Art (Lehrbuch der Aufbereitungskunde).

Size reduction (GIKI)

 · – 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 ...

Size Reduction by Abhijit Debnath

 · 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 reduction …

what is bond s law of crushing

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. MILLING & ANALYSIS OF PARTICLES. In the 50s Bond came up with an empirical relation covering the range between Rit- tinger and Kick''s law, correlating the mass specific comminution work WM,K

How do you increase particle size? – restaurantnorman

 · 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.

Rock Crushing Theory and Formula using Kick & Rittinger''s Law

 · 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 ...

Which of the following crushing laws is most accurately ...

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

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 ...

Principles of Size Reduction

 · Determination of energy required in size reduction is generally done using either Kick''s law or Rittinger''s law. Kicks''s law is used for coarse grinding when the size ratio of original material to end materials is 8:1. Bond''s law and Retinger''s law are used for intermediate and fine grinding respectively, where ratios approach or ...

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 other.

A Review of Advanced Ball Mill Modelling

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

Energy consumption of two-stage fine grinding of Douglas ...

 · 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 ...

Rittinger

2.2.6 The specific energy consumed in grinding. ... 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 ...

High Pressure Grinding Rolls for Minerals

High Pressure Grinding Rolls have been used for the grinding of diamond and iron ores since ... specific energy consumption is then 25% higher, however the overall amount of fines obtained (through pre-screening and HPGR) is ... HPGRs follows Rittinger''s law of the creation of new surface area more closely. Plotting energy

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

 · Ponder Technology, 7 (1973) 315-317 Elsevier Sequoia S A, Lausanne - Printed to The Netherlands A Commentary on the Kick, Bond and Rittinger Laws of Grinding L. G. AUSTIN Department of Material Sciences, The Pennsylcanta State University, University Park, Pa 16802 (U S A ) (Received November 8, 1972) 315 Summary Confusion concerning the so-called general lass of grinding …

Rittinger and Kick''s Laws of Crushing

 · 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 ...

(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 ...

Unit Operations in Food Processing

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 ...

CHAPTER 11 SIZE REDUCTION

Equation (11.2) is a statement of Kick''s 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

(310b) Teaching Old Laws New Tricks – Specific Energy ...

 · Rittinger (1867), Kick (1885) and Bond (1952) all proposed empirical laws to estimate the specific energy requirement for accomplishing a given extent of size reduction expressed in terms of the initial and final particle size (length dimension) and an empirical constant.