ISO/TS 4699:2022

TECHNICAL ISO/TS
SPECIFICATION 4699
First edition
2022-08
Hard Coal — Determination of
plastometric indices — Manual
method
Houille — Détermination des indices plastométriques — Méthode
manuelle
Reference number
© ISO 2022
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reagent and materials .2
6 Apparatus . 3
6.1 Plastometric apparatus . 3
6.1.1 Electric Furnace . 4
6.1.2 Heating elements . 5
6.1.3 Pressure lever assembly . 5
6.1.4 Retort . 5
6.1.5 Thermocouples . 10
6.1.6 Thermocouple tube . 10
6.1.7 Probe . 10
6.1.8 Recording device . 11
6.2 Programmed temperature controller . 11
6.3 Exhaust device . 11
6.4 Mass measurement device . 11
6.5 Spirit level gauge . 11
6.6 Callipers . 11
6.7 Double roll crusher . 11
6.8 1,5 mm round hole sieve . 11
6.9 Sampling shovel . 11
7 Sample preparation .12
8 Preparation for testing .12
8.1 Cleaning retort. 12
8.2 Preparation of paper tube . 12
8.3 Preparation of refractory round pad .12
8.4 Loading retort . 12
8.5 Adjusting the rotary drum (if applicable) . 13
8.6 Determining the height of the coal sample in the retort .13
9 Test procedure .15
10 Expression of result .17
10.1 Processing of plastometric graph . 17
10.2 Displacement curve types . 18
10.3 Calculation and record . 19
11 Precision .20
11.1 Repeatability limit . 20
11.2 Reproducibility limit .20
12 Test report .20
Annex A (informative) Visual assessmentfor the technical characteristics of the coke block .21
Annex B (informative) Methods for checking cross-section load on the coal sample .24
Bibliography .26
iii
Foreword
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This document was prepared by Technical Committee ISO/TC 27, Coal and coke, Subcommittee SC 5,
Methods of analysis.
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iv
Introduction
[5] [6]
The determination of plastic layer indices has been performed in GB/T 479 and GOST 1186 for
many years. First, a manual detection of the height of the upper and lower interfaces of the plastic layer
is performed, then curves for the upper and lower layers are established and finally the maximum
thickness of plastic matter is calculated.
Instrumental methods for a more rapid determination of plastic layer indices are now available. If such
a method is to be used, it is important to demonstrate that the method is free from bias, when compared
to a reference method. In addition, it should give levels of repeatability and reproducibility which are
the same as, or better than, those quoted for the reference method (see Clause 11).
The objective of this document is to provide a reference method for determination of the plastometric
indices.
v
TECHNICAL SPECIFICATION ISO/TS 4699:2022(E)
Hard Coal — Determination of plastometric indices —
Manual method
1 Scope
This document specifies a manual method for the determination of plastometric indices. These indices
are the maximum thickness of the plastic layer (Y, mm) and the final contraction value (X, mm).
This document is applicable for hard coals with a determined ash level less than 15 % on a dry basis, as
described in ISO 11722 and ISO 1171.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1213-2, Solid mineral fuels — Vocabulary — Part 2: Terms relating to sampling, testing and analysis
ISO 3310-2, Test sieves — Technical requirements and testing — Part 2: Test sieves of perforated metal
plate
ISO 13909-1, Hard coal and coke — Mechanical sampling — Part 1: General introduction
ISO 13909-2, Hard coal and coke — Mechanical sampling — Part 2: Coal — Sampling from moving streams
ISO 13909-3, Hard coal and coke — Mechanical sampling — Part 3: Coal — Sampling from stationary lots
ISO 13909-4, Hard coal and coke — Mechanical sampling — Part 4: Coal — Preparation of test samples
ISO 18283, Coal and coke — Manual sampling
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1213-2 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
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