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| Rosin-Rammler-fordelingen× | Vaskbarhedsanalyse× | |
|---|---|---|
| Fagområde | Minedrift | Minedrift |
| Familie | Process / pipeline | Process / pipeline |
| Oprindelsesår≠ | 1933 | 1950 |
| Ophavsperson≠ | Paul Rosin and Erich Rammler | Mining Industry Practice (1930s-1960s) |
| Type≠ | Empirical probability distribution for crushed material fineness | Separation analysis by density fractionation |
| Oprindelig kilde≠ | Rosin, P., & Rammler, E. (1933). The laws governing the fineness of powdered coal. Journal of the Institute of Fuel, 7, 29-36. link ↗ | McCullough, R. B. (1963). The theoretical basis and practical application of coal washability studies. Transactions of the Society of Mining Engineers, 226, 13-26. link ↗ |
| Aliasser | Rosin-Rammler Model, RRS Distribution, Weibull Distribution (particle size) | Coal Washability, Density Separation Analysis, Float-Sink Analysis |
| Relaterede | 3 | 3 |
| Resumé≠ | The Rosin-Rammler Distribution, introduced by Paul Rosin and Erich Rammler in 1933, is an empirical probability distribution that describes the particle size distribution of ground or crushed materials. It characterizes fineness by two parameters: the characteristic size (d-prime) and the uniformity index (n). This distribution is remarkably accurate for mineral processing streams and is ubiquitous in comminution engineering. | Washability analysis is a laboratory method that determines the feasibility and efficiency of density-based separation for coal or mineral beneficiation. By fractionating ore or coal into density bins using sink-float tests and assaying each fraction, engineers can optimize design of separation plants (dense-medium cyclones, jigs, spirals) and predict clean product quality. Washability curves are essential tools for pre-feasibility and detailed design studies. |
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