### CHAPTER 11 SIZE REDUCTIONNZIFSTHome

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

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• 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 lawStates that the energy required for size reduction is proportional to the change in surface area of the pieces of food •

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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.

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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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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.

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rittinger law specific grindingHard Pressed Café. laws grinding classical . rittinger law specific grinding Mill (grinding) Wikipedia the free encyclopedia A grinding mill is a unit operation designed to break a solid material into smaller piec Free Quote rittinger law specific grinding ic4medicapsin A commentary on the Kick Bond and Rittinger laws of grinding A Eq 22 is the link that

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the grinding laws. THE GRINDING LAWS The amount of energy required for size reduction of solid foods can be theoretically calculated based on the following equation d d n x E K x = − (1) where dE is the energy required in breaking a unit mass of diameter x about size dx K and n are constants depending on the ground material and grinding

Chat Online### CHAPTER 20 SIZE REDUCTIONEQUIPMENT 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 lawStates that the energy required for size reduction is proportional to the change in surface area of the pieces of food •

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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.

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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.

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rittinger law specific wet ball mill. rittinger law specific grindingHard Pressed Café. laws grinding classical . rittinger law specific grinding Mill (grinding) Wikipedia the free encyclopedia A grinding mill is a unit operation designed to break a solid material into smaller piec Free Quote rittinger law specific grinding ic4medicapsin A commentary on the Kick Bond and Rittinger laws of

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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

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Sep 29 2020 · 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

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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 .

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Si = initial specific surface area Sn = final specific surface area This theory is used when neither Kick s nor Rittinger s law is applicable. n =2.0 Walker equation becomes Rittinger s theory •It is rapid in action and is capable of grinding many

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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

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Jun 03 2014 · It implies that the specific energy required to crush a material for example from 10 cm down to 5 cm is the same as the energy required to crush the same material from 5 mm to 2.5 mm. Rittinger s law Rittinger assumed that the energy required for size reduction is directly proportional to the change in surface area.

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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.

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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 .

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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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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

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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.

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Keywords ball mill specific grinding rate grain morphology contact points energy issues are the studies carried out by Bond 1952 Brach 1962 Kick 1885 Rittinger 1867 have any constant values for all size ranges Lynch 1977. Get Price

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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.

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Rittinger s law (1867) shows a linear correlation between the evolution of specific surface area and the energy (time) of grinding. In general this is true at the beginning of the grinding process when the "Blaine Specific Surface Area" (B.S.S.A.) is still low. However in practice it has been proven that

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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

Chat Online### CHAPTER 11 SIZE REDUCTIONNZIFSTHome

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

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### Rittingeran overview ScienceDirect Topics

Thus the higher the index the easier is the grinding task. This method loosely assumes that the specific energy consumed is proportional to the new surface generated following the concept of Rittinger s law of comminution. Berkowitz (1994 p.96) gives a generalized variation of the Hardgrove index with coal rank. According to the variation

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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

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rittinger law specific grindingHard Pressed Café. laws grinding classical . rittinger law specific grinding Mill (grinding) Wikipedia the free encyclopedia A grinding mill is a unit operation designed to break a solid material into smaller piec Free Quote rittinger law specific grinding ic4medicapsin A commentary on the Kick Bond and Rittinger laws of grinding A Eq 22 is the link that

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analysis of the breakage rate function for selected process. Keywords ball mill specific grinding rate grain morphology contact points energy issues are the studies carried out by Bond 1952 Brach 1962 Kick 1885 Rittinger 1867 have any constant values for all size ranges Lynch 1977

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Life. The son of poor parents Peter von Rittinger attended high school in Leipnik (Lipník nad Bečvou Moravia) and in difficult circumstances studied at the Faculty of Philosophy and the Faculty of Law of University of Olomouc.After completion of legal studies von Rittinger studied in the mining department at the Mining and Forestry Academy in Schemnitz (Banská Štiavnica Slovakia).

Chat Online### CHAPTER 11 SIZE REDUCTIONNZIFSTHome

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

Chat Online### 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.

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⇒ Which of the following crushing laws is most accurately applicable to the fine grinding of materials Bond s crushing law Kick s law Rittinger s law None of these. ⇒ During the washing of cake all the resistances are constant. filter medium resistance increases. filter medium resistance decreases. cake resistance decreases.

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