Rosin-Rammler-Sperling-Bennett

Figure 3.4.14 Example of an ideal particle size distribution curve according to the Rosin-Rammler-Sperling-Bennett (RRSB) function for n = 1.3 ...

To interpret sieve data, graphical and statistical methods of data presentation are used. The distribution curve that is widely used in industrial practice was developed by Rosin, Rammler, Sperling, and Bennett in the 1930s (Rosin, Rammler, Sperling, 1997 Rosin and Rammler, 1933 Bennett, 1936). They found out that the size distribution of coal dust and of other crushed and milled materials like cement follows a probability curve with a similar pattern as well-known physical functions such as the Maxwdl-BoUzmann distribution (Section 3.1.4) of the speed of gas molecules (Schubert and Waechtler, 1969). The so-called Rosin-Rammler-Sperling-Bennett (RRSB) function is given by ... 

Rosin-Rammler-Sperling-Bennett Particle Size Distribution... 

The Rosin-Rammler-Sperling-Bennett (RRSB) particle size distribution is widely used for coal characterization. The basic formulation is... 

The coal particles can be tracked as parcels in an Eulerian-Lagrangian framework. Discrete phase model (DPM) are used to define the injected particles that enter the reactor. In the case of INCI, simulation values for axial velocity of -1.732 m/s and a radial velocity of -l.Om/s of the particles must be provided. If agglomeration is neglected, a maximum particle diameter of 0.1 mm, a mean diameter of 0.09 mm, and a minimum diameter of 0.001 mm are assumed according to a Rosin-Rammler-Sperling-Bennett distribution with a spread parameter of = 0.688 in 10 individual groups for fluid-bed coal (see also Section 3.12.3.3). Particles can be treated as nonspherical with a shape factor of 0.85. 

Other model distributions used are the normal distribution (Laplace-Gauss), for powders obtained by precipitation, condensation, or natural products (e.g., pollens) the Gates-Gaudin-Schuh-mann distribution (bilogarithmic), for analysis of the extreme values of fine particle distributions (Schuhmann, Am. Inst. Min. Metall. Pet. Eng., Tech. Paper 1189 Min. Tech., 1940) or the Rosin-Rammler-Sperling-Bennet distribution for the analysis of the extreme values of coarse particle distributions, e.g., in monitoring grinding operations [Rosin and Rammler,/. Inst. Fuel, 7,29-36 (1933) Bennett, ibid., 10, 22-29 (1936)]. 

The RRSB distribution according to Rosin, Rammler, Sperling, and Bennett. 

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