Undersize fractions

Size Weight weight in undersize. fraction. weight of component... 

Particulate material fed to a screen can be considered to be composed of two fractions, an oversize fraction consisting of particles that are too large to pass through the screen apertures, and an undersize fraction consisting of particles... 

To obtain the fraction of the sub 56.4 pm material that settles, plot column E, the fraction of particles of a given size settling in 1800 s, against column B, the cumulative undersize fraction of material present, and integrate. The area under this curve is the... 

Finally, from the tabulated data in Table 2.10 the Stokes diameter Xj, can be plotted versus the cumulative weight undersize fraction F, as to obtain the graph shown in Figure 2.34. 

When one extends the liquid addition period, the bar continues to abrade the granules. Favorably, any particles that have been fractured can be rewetted and the fracture sruface can easily bind to another particle. This mechanism tends to hold down the oversized fraction without the expected increase in the undersized fraction. 

Cumulative particle size distributions represent another class of commonly discussed quantities, either introduced as the undersize fraction ... 

Figure 5.3. The basic steps for generating a Tromp s curve to evaluate the efficiency of an elutriator. a) Size distribution of the (xjwder sample, b) Size distributions of the undersize and oversize from the elutriator. c) Tromps curve for the elutriator spans the size range between the lower limit of the oversize fraction and the upper limit of the undersize fraction. The Index of Fractionation Efficiency is the ratio of the values x25nt75.

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