ISO/TS 20362:2022

TECHNICAL ISO/TS
SPECIFICATION 20362
First edition
2022-08
Hard coal — Determination of
plastometric indices — Automated
Sapozhnikov penetration plastometer
method
Houille — Détermination des indices plastométriques — Méthode
automatisée du plastomètre à pénétration Sapozhnikov
Reference number
© ISO 2022
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Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Materials . 2
5.1 Cigarette rolling paper . 2
5.2 Filter paper . 2
5.3 Thin steel rod . 2
5.4 Refractory ceramic round pad . 2
5.5 Abrasive cloth . 3
6 Apparatus . 3
6.1 Automated Sapozhnikov penetration plastometer . 3
6.2 Determinator . 4
6.2.1 Electric furnace . 5
6.2.2 Heating elements . 6
6.2.3 Steel retort . 6
6.2.4 Thermocouples . 9
6.2.5 Thermocouple well . 10
6.2.6 Probe . 10
6.2.7 Pressure lever assembly . 10
6.2.8 Displacement sensors . 10
6.2.9 Weights elevating device. 10
6.2.10 Levelling assembly . . 10
6.2.11 Exhaust device. 10
6.3 Weighing device . . . 10
6.4 Spirit level gauge . 10
6.5 Callipers . 10
6.6 Double rolls crusher. 11
6.7 1,5 mm round hole sieve . 11
6.8 Calibrated ruler . . 11
7 Sample preparation .11
8 Calibration .11
8.1 Furnace-temperature calibration . 11
8.2 Displacement calibration. 11
8.3 Determination of zero-height .12
9 Preparation for testing .12
9.1 Cleaning retort. 12
9.2 Preparation of paper tube . 12
9.3 Preparation of refractory ceramic pad .12
9.4 Loading retort . 12
9.5 Determination of the height of the coal sample in the steel retort .13
10 Test procedure .14
11 Expression of results .15
12 Precision .17
12.1 Repeatability limit . 17
12.2 Reproducibility limit . 17
13 Test report .17
iii
Annex A (informative) Schematic diagram of processing on plastometric graph .18
Annex B (informative) Methods for checking the cross sectional load on the coal sample .20
Bibliography .22
iv
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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v
Introduction
Historically the determination of plastic layer indices has been performed by manual operation. Firstly,
the thickness of the plastic layer is detected with a probe by hand, then curves of the upper and lower
layer are manually established and the results calculated. This process is labour intensive and required
technicians with vast experience.
In recent years, the automated type of determinator was developed to measure the plastic layer indices.
Displacement curves are auto-established by computer. The intelligent manipulator automatically
measures the thickness of plastic layer and establishes curves of upper and lower plastic layer. The
result is reported by the system automatically.
The objective of this document is to provide an alternative method for determining the plastic layer
indices with automated Sapozhnikov penetration plastometer.
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TECHNICAL SPECIFICATION ISO/TS 20362:2022(E)
Hard coal — Determination o
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