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FM 306: SIZE REDUCTION AND SIEVING OBJECTIVE •To grind the given limestone material to a smaller size using a ball mill and to obtain the size distribution of the initial and the final mixture by sieving. •To estimate the energy required for the grinding operation. •To analyze the results using the available theories. INTRODUCTION
•To increase the specific surface area •To produce particles of certain size/shape ... Rittinger [s law, b)Kicks law and c)Bonds Law 20. Predicting Energy Requirements Rittinger: C R ... •Use wet grinding (good heat transfer, liquid may serve a heat sink)
In Summary, Kick''s law is better for larger particles and Rittinger''s for fine grinding, see 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.
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
Ponder Technology, 7 (1973) 315317 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 socalled general lass of grinding .
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 ...
Neither of these two laws permits an accurate calculation of the energy requirements. Rittinger''s law is . Airborne Dust Liberation During Coal Crushing CDC. Analogous to the laws of Bond, Kick and Rittinger [20], more specific energy is required to .
Grinding and cutting. Energy Used in Grinding Kick''s Law Rittinger''s Law Bond''s Law Work Index New Surface Formed by Grinding shape factors specific surface Grinding equipment. Crushers Hammer mills Fixedhead mills Plate mills
Breakthrough in Clinker Grinding Concrete Sustainability Hub MIT rittinger law specific grinding,Hukki (1962) attempted to balance the work of Von Rittinger, Kick, and Bond by combining the individual equations into one, Griffith''s Law also requires a characteristic length scale to define a fracture process zone That process zone is, Powder Processing .
were proposed by Rittinger (1867), Kick (1885) and Bond (1952), known as the three ... Bond (1952) proposed the ''Third Law'' of grinding. The Third Law states that the net energy required in comminution is propor ... between the product P80 and the net specific grinding energy for all LIMS tail (non magnetic) and LIMS concentrate
Chemical Engineering Stop: Rittinger''s and Kick''s laws. May 14, 2010· Rittinger''s and Kick''s laws Rittinger''s law states that work required in crushing is proportional to the new surface created. In other words, crushing efficiency is constant and for a given machine and feed material is independent of the sizes of feed and product.
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.
•A crushing law proposed by Rittinger in 1867 states that – the work required in crushing is proportional to the new surface created • This law, which is really no more than a hypothesis – is equivalent to the statement that the crushing efficiency is constant and, for a given machine and feed material – is independent of the sizes of feed and ...
Laws Of Crushing And Grinding Sep 04, 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 Get Price rittinger law specific grinding . laws of crushing and grinding The law specifically grinding Rittinger.
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 ...
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.
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 completion of legal studies, von Rittinger studied in the Montanist box at the Mining and Forestry Academy in Schemnitz (Banská Štiavnica, Slovakia).
Oct 25, 2016· size reduction,laws involved in size reduction,application mills 1. SIZE REDUCTION Size reduction is the process of reducing the particle size of a substance to a finer state of subdivision to smaller pieces to coarse particles or to powder. Size reduction process is also referred to as comminution and grinding.
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 .
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.)
Energy requirements in size reduction of solids * L G. Reddy INTRODUCTION ... specific surface production are obtained by crush ... fine grinding is the range of Rittinger''s theory ( m = — ). the range of fine grinding from m = —1 to — 3,
Equation () 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. () 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 ...
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.
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.
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