Standard
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AS 3880:2017
[Current]Flow properties of coal
Sets out a series of tests to characterize the flow properties of coal as the basis for designing equipment to achieve reliable flow at the desired flowrate.
Published: 30/08/2017
Pages: 38
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Referenced documents
1.3 Definitions
1.4 Notation
2 Sampling
2.1 General
2.2 Sample preparation
2.2.1 Sample top size
2.2.2 Sample size
2.2.3 Sample division
2.2.4 Moisture content
3 Apparatus
3.1 General
3.2 Tester
3.3 Specifications
3.3.1 Rings
3.3.1.1 Rings dimensions
3.3.1.1.1 Internal diameter
3.3.1.1.2 Ring thickness
3.3.1.1.3 Rings height
3.3.1.2 Rings material
3.3.1.3 Bottom of the cell base
3.3.2 Other
3.3.2.1 Twisting lid
3.3.2.2 Shear lid
3.3.2.3 Twisting wrench
3.3.2.4 Frame
3.3.2.5 Locating screws
3.3.2.6 Loading stem
3.3.2.7 Load cell
3.3.2.8 Wall material sample
4 Instantaneous shear test
4.1 General
4.2 Procedure
4.2.1 Step 1: Sample preconsolidation
4.2.2 Step 2: Consolidation under shear
4.2.3 Step 3: Actual shear test
4.3 Instantaneous yield locus
4.3.1 General
4.3.2 Test procedure
4.3.3 Prorating procedure for the shear stress
4.3.4 Plot of instantaneous yield locus
4.3.5 Further data
4.4 Complete family of instantaneous yield loci
4.4.1 General
4.4.2 Test procedure
4.4.3 Plot of a family of yield loci
4.5 Instantaneous flow function
4.5.1 General
4.5.2 Plot of instantaneous flow function
4.6 Acceptance of results
4.7 Reporting and presentation of results
4.8 Precision
5 Additional shear tests
5.1 General
5.2 High-pressure yield locus
5.3 Time yield locus
5.4 Temperature yield locus
5.5 Vibration yield locus
6 Wall shear tests
6.1 General
6.2 Test procedure
6.2.1 Test preparation
6.2.2 Step 1: Sample preconsolidation
6.2.3 Step 2: Shearing on the wall sample
6.3 Wall yield locus
6.4 Wall friction angle
6.5 Static angle of wall friction
6.6 Precision of determination
7 Bulk density/compressibility
7.1 General
7.2 Apparatus
7.3 Test procedure
7.4 Determination of bulk density
7.5 Precision of determination
Appendix A
A1 The role of flow properties in designing reliable bulk handling equipment
A2 Flow properties of coal
Appendix B
B1 General
B2 Sampling
B3 Equipment
B4 Test procedure
B5 Calculation
Appendix C
C1 Selection of consolidation stress for shearing based on bulk density
C2 Equivalence between mass, force and stress
Appendix D
D1 General
Cited references in this standard
[Current]
Hard coal and coke - Mechanical sampling - Part 4: Coal - Preparation of test samples
[Withdrawn]
Loads on bulk solids containers — Commentary (Supplement 1 to AS 3774-1996)
[Withdrawn]
Coal and coke — Analysis and testing, Part 1: Higher rank coal — Total moisture
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