laws grinding rittinger

Unit OperatiOn Size Reduction

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

Size reduction (GIKI) - SlideShare

– 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 ...

Rittinger and Kick's Laws of Crushing

Mar 08, 2016· Hydrometallurgists must regret to see Rittinger's law disproved, for surface exposed is, in general, a measure of the accessibility of solutions to ore; and this rule also ceases to approximate the truth only when the finest sizes are reached. If the premises are sound the author has evidently proved the case for Stadler's Energy Units.

Size Reduction by Abhijit Debnath -

Nov 01, 2018· 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 …

Part 2: Law of Size Reduction: Rittinger's Law - YouTube

This video is dedicated to the explanation of Rittinger's law of size reduction. Please refer the video related to Kick's law also.Link as follows:Subscribe ...

Chemical Engineering Stop: Bond's law

May 14, 2010· Bond's law. Bond postulated that work required to form particles of size Dp from very large feed is proportional to the square root of the surface-to-volume ratio of the product, Sp/Vp. By relation Sp/Vp = 6/ɸsDp, from which it follows that. P/ ṁ = Kb/ (Dp)^0.5. Where Kb is a constant that depends on the type of machine and on the material ...

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

Looking for Rittinger's law? Find out information about Rittinger's law. The law that energy needed to reduce the size of a solid particle is directly proportional to the …

CHAPTER 11 SIZE REDUCTION - NZIFST

Grinding and cutting reduce the size of solid materials by mechanical action, dividing them into smaller particles. Perhaps the most extensive application of grinding in the food industry ... 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) ...

Comminution Laws Comparison - Minerallurgy

Rittinger's law. In mathematical terms Rittinger's law may be ex-pressed as. dE/dL = -K1 K/L^2 (1.1) where. E is the energy input, K1 the surface energy, K the shape factor, and L the particle size. On integration this equation may be expressed as. E=K2(1/L2-1/L1). (1.2) where

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

Mar 11, 2016· 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:

Rittinger's, Kick's and Bond's Crushing Laws - YouTube

About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators ...

Principles of Size Reduction - Solid Foods - Food Science ...

Feb 21, 2018· 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 ...

size reduction,laws involved in size reduction ...

Oct 25, 2016· • Rittinger's law gives better results with fine grinding where there is a much larger increase in surface area • Bond's law is intermediate between these two. However,equations Rittinger's law and Bond's law were developed from studies of …

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.

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 • …

(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 …

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.

Laws of size reduction - CHEMICAL ENGINEERING NOTES

Aug 19, 2019· 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.

Size-reduction process mechanism and evaluation

Rittinger's law states that the energy required for size reduction is proportional to the change in surface area of the particles. Rittinger's law gives better results with fine grinding where there is a much larger increase in surface area. According to Rittinger, the D and d should be calculated as follows:

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 ...

4 Size reduction - UB

grinding in which there is a relatively small increase in surface area per unit mass. Rittinger's law gives better results with fine grinding where there is a much larger increase in surface area and Bond's law is intermediate between these two. However, equations (4.2) and (4.3) were developed from studies of hard materials (coal and ...

Rittinger - an overview | ScienceDirect Topics

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.

How Material Size Directly Affects Size Reduction Energy ...

Mar 25, 2015· It may not be well known, but there are three physical laws that describe the energy required for size reduction. They are the Bond's Law, Rittinger's Law, and Kick's Law. These laws provide a relative approach to looking at the materials being reduced and do not include equipment efficiency or material friability characteristics.

(PDF) Development of size reduction equations for ...

Rittinger constant for grinding pine chips by hammer mill is. ... universal laws for fr agmentation due to impact and explos ion. J. Appl Mech 69(6):854. doi: 10.1 115/1.148893 7. 23.

(PDF) Comminution in mineral processing

Cone, jaw, gyroscopic crushing etc. are the most common techniques for crushing whereas grinding is usually performed by rod milling, ball milling etc. ... Rittinger's law and 2) Kick's law ...

What is the relationship between Rittinger's law Kick's ...

Apr 30, 2008· In 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 …

Theory of Size Reduction - Food Tech Notes

Jul 15, 2020· Rittinger's law is applicable mainly to that part of process where new surface is being created and hold most accurately for fine grinding where the increase in surface per unit mass of material is predominant. Thus, it gives better results for fine grinding where there is much larger change in surface area. This law is applicable for feed ...

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

Nov 10, 2015· According to Rhodes (2008), the typical application range of Rittinger's law is to ultrafine grinding below 30 micron. Breakage rate exponents for particle volume extracted from 15 literature data sets indicate values in the range 1/4-1. These bracket the value of 1/3 implied by Rittinger's law and do not support the values implied by the ...

Laws of comminution - YouTube

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 dis...

AMIT 135: Lesson 6 Grinding Circuit – Mining Mill Operator ...

Grinding takes place in more "open" space which makes the retention time longer and adjustable compared to crushers. Theoretical size reduction and power ranges for different grinding mills [image: (135-6-1)] AG/SAG Mills Autogenous Grinding (AG) Mill. Wet or dry; Primary, coarse grinding (up to 400 mm feed size) Grinding media is grinding feed

rittinger s law reduction

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 …

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rittinger law specific grinding

Rittinger Law Specific Crusher. rittinger law of grinding rittinger law of grinding size reductionlaws involved in size reduction Oct 25 2016 Rittingers law gives better results with fine grinding where there is a much larger increase in surface area Bonds law is intermediate between these two A crushing law proposed by Rittinger .

(PDF) ADVANCE TECHNOLOGY FOR SPICES GRINDING -A …

Power required is calculated by the equation, P = E × f (2) Where, f is feed rate (kg/hr) Energy Laws in Grinding Rittinger's Law: This law which states that the work required in crushing is proportional to the new surface developed.

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 ...

laws grinding rittinger

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