ISO/TS 4699:2022
Hard Coal — Determination of plastometric indices — Manual method
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.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagent and materials
6 Apparatus
6.1 Plastometric apparatus
6.1.1 Electric Furnace
6.1.2 Heating elements
6.1.3 Pressure lever assembly
6.1.4 Retort
6.1.5 Thermocouples
6.1.6 Thermocouple tube
6.1.7 Probe
6.1.8 Recording device
6.2 Programmed temperature controller
6.3 Exhaust device
6.4 Mass measurement device
6.5 Spirit level gauge
6.6 Callipers
6.7 Double roll crusher
6.8 1,5 mm round hole sieve
6.9 Sampling shovel
7 Sample preparation
8 Preparation for testing
8.1 Cleaning retort
8.2 Preparation of paper tube
8.3 Preparation of refractory round pad
8.4 Loading retort
8.5 Adjusting the rotary drum (if applicable)
8.6 Determining the height of the coal sample in the retort
9 Test procedure
10 Expression of result
10.1 Processing of plastometric graph
10.2 Displacement curve types
10.3 Calculation and record
11 Precision
11.1 Repeatability limit
11.2 Reproducibility limit
12 Test report
Annex A (informative) Visual assessmentfor the technical characteristics of the coke block
Annex B (informative) Methods for checking cross-section load on the coal sample
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagent and materials
6 Apparatus
6.1 Plastometric apparatus
6.1.1 Electric Furnace
6.1.2 Heating elements
6.1.3 Pressure lever assembly
6.1.4 Retort
6.1.5 Thermocouples
6.1.6 Thermocouple tube
6.1.7 Probe
6.1.8 Recording device
6.2 Programmed temperature controller
6.3 Exhaust device
6.4 Mass measurement device
6.5 Spirit level gauge
6.6 Callipers
6.7 Double roll crusher
6.8 1,5 mm round hole sieve
6.9 Sampling shovel
7 Sample preparation
8 Preparation for testing
8.1 Cleaning retort
8.2 Preparation of paper tube
8.3 Preparation of refractory round pad
8.4 Loading retort
8.5 Adjusting the rotary drum (if applicable)
8.6 Determining the height of the coal sample in the retort
9 Test procedure
10 Expression of result
10.1 Processing of plastometric graph
10.2 Displacement curve types
10.3 Calculation and record
11 Precision
11.1 Repeatability limit
11.2 Reproducibility limit
12 Test report
Annex A (informative) Visual assessmentfor the technical characteristics of the coke block
Annex B (informative) Methods for checking cross-section load on the coal sample
Bibliography