BS ISO 9276-4:2001+A1:2017
$142.49
Representation of results of particle size analysis – Characterization of a classification process
| Published By | Publication Date | Number of Pages |
| BSI | 2017 | 26 |
The main object of this part of ISO 9276 is to provide the mathematical background for the characterization of a classification process. This part of ISO 9276 is not limited to an application in particle size analysis, the same procedure may be used for the characterization of a technical classification process (e.g. air classification, centrifugal classification) or a separation process (e.g. gas or hydrocyclones).
In clause 3 the characterization of a classification process is described under the presupposition that the distribution density curves describing the feed material and the fractions, as well as the overall mass balance, are free from errors. In clause 4 the influence of systematic errors on the efficiency of a classification process is described. The effect of stochastic errors in the characterization of a classification process is described in annex A.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 6 | Foreword |
| 7 | Introduction |
| 9 | 1 Scope 2 Symbols 2.1 Symbols for specific terms |
| 10 | 2.2 Subscripts 3 Characterization of a classification process based on error-free distribution curves and mass balances 3.1 Distribution density curves representing a classification process |
| 12 | 3.2 Mass and number balances 3.2.1 Mass and number balance in the size range from xmin to xmax 3.2.2 Mass and number balance in the size range from x to x + dx |
| 13 | 3.2.3 Mass and number balance in the size range from xmin to x 3.2.4 The indirect evaluation of vr,f and vr,c 3.3 Definitions of cut size, xe 3.3.1 General 3.3.2 The equiprobable cut size, xe, the median of the grade efficiency curve 3.3.3 The analytical cut size, xa |
| 14 | 3.4 Grade efficiency, T, the grade efficiency curve, T(x), (Tromp’s curve) |
| 15 | 3.5 Measures of sharpness of cut 3.5.1 General 3.5.2 Parameters formed with characteristic particle sizes |
| 16 | 3.5.3 Parameters derived from cumulative distribution curves |
| 17 | 3.5.4 The total classification or separation efficiency, To |
| 18 | 4 The influence of systematic errors on the determination of grade efficiency curve 4.1 General 4.2 Systematic error due to a splitting process in the classifier |
| 19 | 4.3 Incomplete dispersion of the feed material 4.4 The influence of comminution of the feed in the classifier |
| 20 | Annex A (informative) The influence of stochastic errors on the evaluation of grade efficiency curves |
| 25 | Bibliography |
