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BS ISO 20904:2006

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Hard coal. Sampling of slurries
Available format(s)

Hardcopy , PDF

Superseded date

04-03-2020

Language(s)

English

Published date

30-11-2006

Foreword
1 Scope
2 Normative references
3 Definitions
4 Principles of sampling slurries
   4.1 General
   4.2 Sampling errors
   4.3 Sampling and overall variance
5 Sampling schemes
6 Minimization of bias and unbiased increment mass
   6.1 Minimizing bias
   6.2 Volume of increment for falling stream samplers
        to avoid bias
   6.3 Volume of increment for manual sampling to avoid
        bias
7 Precision of sampling and determination of increment
   variance
   7.1 Overall precision
   7.2 Primary increment variance
   7.3 Preparation and testing variance
8 Number of sub-lots and number of increments per sub-lot
9 Minimum mass of solids in lot and sub-lot samples
   9.1 General
   9.2 Minimum mass of solids in lot samples
   9.3 Minimum mass of solids in sub-lot samples
   9.4 Minimum mass of solids in lot and sub-lot samples
        after size reduction
10 Time-basis sampling
   10.1 General
   10.2 Sampling interval
   10.3 Cutters
   10.4 Taking of increments
   10.5 Constitution of lot or sub-lot samples
   10.6 Division of increments and sub-lot samples
   10.7 Division of lot samples
   10.8 Number of cuts for division
11 Stratified random sampling within fixed time intervals
12 Mechanical sampling from moving streams
   12.1 General
   12.2 Design of the sampling system
   12.3 Slurry sample cutters
   12.4 Mass of solids in increments
   12.5 Number of primary increments
   12.6 Routine checking
13 Manual sampling from moving streams
   13.1 General
   13.2 Choosing the sampling location
   13.3 Sampling implements
   13.4 Mass of solids in increments
   13.5 Number of primary increments
   13.6 Sampling procedures
14 Sampling of stationary slurries
15 Sample preparation procedures
   15.1 General
   15.2 Reduction mills
   15.3 Sample division
   15.4 Chemical analysis samples
   15.5 Physical test samples
16 Packing and marking of samples
Annex A (informative) Examples of correct slurry devices
Annex B (informative) Examples of incorrect slurry sampling
        devices
Annex C (normative) Manual sampling implements
Bibliography

Sets out the basic methods for sampling fine coal, coal rejects or tailings of nominal top size < 4 mm that is mixed with water to form a slurry.

Committee
PTI/16
DevelopmentNote
Supersedes 05/30135096 DC. (11/2006)
DocumentType
Standard
Pages
44
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

Standards Relationship
ISO 20904:2006 Identical

ISO 13909-4:2016 Hard coal and coke — Mechanical sampling — Part 4: Coal — Preparation of test samples
ISO 13909-1:2016 Hard coal and coke — Mechanical sampling — Part 1: General introduction
ISO 13909-7:2016 Hard coal and coke — Mechanical sampling — Part 7: Methods for determining the precision of sampling, sample preparation and testing
ISO 13909-8:2016 Hard coal and coke — Mechanical sampling — Part 8: Methods of testing for bias
ISO 1213-1:1993 Solid mineral fuels Vocabulary Part 1: Terms relating to coal preparation
ISO 13909-2:2016 Hard coal and coke — Mechanical sampling — Part 2: Coal — Sampling from moving streams
ISO 18283:2006 Hard coal and coke Manual sampling
ISO 13909-3:2016 Hard coal and coke — Mechanical sampling — Part 3: Coal — Sampling from stationary lots
ISO 1213-2:2016 Solid mineral fuels — Vocabulary — Part 2: Terms relating to sampling, testing and analysis

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