1 - AS 3880:1991 BIN FLOW PROPERTIES OF COAL
6 - PREFACE
6 - CONTENTS
7 - FOREWORD
8 - 1 SCOPE
8 - 2 REFERENCED DOCUMENTS
8 - 3 DEFINITIONS
9 - 4 NOTATION
10 - 5 SAMPLING AND SAMPLE PREPARATION
10 - 5.1 Sampling
10 - 5.2 Sample preparation
10 - 6 DETERMINATION OF YIELD LOCUS
10 - 6.1 Apparatus
10 - 6.2 Instantaneous yield locus
10 - 6.2.1 General
11 - 6.2.2 Preconsolidation of the sample
11 - 6.2.3 Consolidation under shear
13 - 6.2.4 Shearing of the sample
13 - 6.2.5 Determination of the complete family of instantaneous yield loci
14 - 6.3 Other yield loci
14 - 6.3.1 High-pressure yield locus
14 - 6.3.2 High-pressure yield locus
14 - 6.3.3 Temperature yield locus
14 - 6.3.4 Vibration yield locus
14 - 6.4 Reporting and presentation of results
14 - 6.4.1 General
14 - 6.4.2 Prorating procedure
15 - 6.4.3 Determination of the instantaneous flow function
15 - 6.5 Acceptance of results and precision of the determination
17 - 7 DETERMINATION OF WALL YIELD LOCUS
17 - 7.1 Principle
17 - 7.2 Apparatus
17 - 7.3 Sample
17 - 7.4 Procedure
17 - 7.5 Calculations
18 - 7.6 Determination of wall friction angle (f)
18 - 7.7 Precision of determination
19 - 8 DETERMINATION OF BULK DENSITY/ COMPRESSIBILITY
19 - 8.1 General
19 - 8.2 Apparatus
19 - 8.3 Sample
19 - 8.4 Procedure
19 - 8.5 Calculations
19 - 8.6 Presentation of results
19 - 8.7 Precision of determination
21 - APPENDIX A - BIN DESIGN PHILOSOPHY
21 - A1 GENERAL
21 - A2 HOPPER HALF-ANGLE
21 - A3 BIN CAPACITY
21 - A4 HOPPER OUTLET
21 - A5 REFERENCES

Sets out methods for the measurement of the flow properties of coal, primarily for the design of bins and chutes.

This Standard sets out methods for the measurement of the flow properties of coal, primarily for the design of bins and chutes. It also provides some guidance on the presentation of these data for analysis and design.The Standard consists of a bulk density test and a yield locus test giving information on material flow properties. It also describes a further test, called the wall yield locus, which measures the friction between coal and bin wall material.Although this Standard is nominally for coal, the principles and apparatus may be used for coke and other semi-cohesive particulate materials where a knowledge of flow properties is required.NOTE: Some discussion of the relevance of coal flow properties to bin design philosophy is provided in Appendix A.

Reconfirmed 2013.