TABLE OF CONTENTS The separation curve is the most important characteristic of the fractionation process. We shall examine the main properties of the separation curves in fractionation of polydispersed bulk materials.
The degree of fractional separation into the fine product has the values in the range from 1 to 0.
In this case
| (XI-1) |  |
The separation curve is continuous and differentiable in the entire range of values of x.
The separation curve is monotonically decreasing (this may be strictly confirmed on the basis of the structural model of the regular cascade), i.e.
| (XI-2) |  |
In most cases, the separation curve has two characteristic sections:
The middle section of the curve is often approximated with sufficient accuracy by a linear dependence.
The length of the lower part of the curve in the size range is usually greater than the length of the upper curve.
Separation curves in different regimes in a relatively wide range of the separation boundary in the self-similar region of the consumption concentration ( ? ? 2 3 kg/m 3) are affine similar. In this case, the scale coefficients on the co-ordinate axis
This property is very important because, taking it into account, it is possible to pre-determine the results of the process in transition from one regime to another (from one separation boundary to another).
Equations (XI-1) and (XI-2) may be interpreted as the boundary conditions which must be satisfied by the typical separation curves.
The separation curve in...
