ASTM D2639/D2639M-16

Standard Test Method for Plastic Properties of Coal by the Constant-Torque Gieseler Plastometer

SIGNIFICANCE AND USE
5.1 Reliable values of the plastic properties of coals are used to predict or explain the behavior of a coal or blends during carbonization or in other processes such as gasification, liquefaction, and combustion.

General Information

• Status: Historical
• Publication Date: 29-Feb-2016
• ICS: 75.160.10 - Solid fuels
• Technical Committee: D05 - Coal and Coke
• Drafting Committee: D05.15 - Metallurgical Properties of Coal and Coke

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D2639/D2639M − 16
Standard Test Method for
Plastic Properties of Coal by the Constant-Torque Gieseler
1
Plastometer
This standard is issued under the fixed designation D2639/D2639M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope ball of coal forming around the base of the stirrer, and which
makes reporting of the true maximum fluidity of the coal
1.1 This test method covers a relative measure of the plastic
difficult.
behavior of coal when heated under prescribed conditions.This
test method may be used to obtain semiquantitative values of 3.1.2 dial division per minute, DDPM, n—as used in this
test method, a measure of stirrer rotation rate. There are
the plastic properties of coals and blends used in carbonization
and in other situations where determination of plastic behavior 100 dial divisions for each full 360 ° rotation of the stirrer.
Stirrer rotation rate is the total dial divisions turned by the
of coals is of practical importance.
stirrer in a one minute time period.
1.2 The values stated in either SI units or inch-pound units
3.1.3 initial softening temperature, n—as used in this test
are to be regarded separately as standard. The values stated in
method, the temperature at which the stirrer rotation rate first
each system may not be exact equivalents; therefore, each
reaches 1.0 dial divisions per minute.
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
3.1.4 jamming, v—swelling up of coal into the retort tube
with the standard.
during the test, which may produce lower fluidity results than
expected and can only be noted after visual inspection of the
1.3 This standard does not purport to address all of the
disassembled crucible and retort at the conclusion of the test.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.1.5 maximum fluidity, n—as used in this test method, the
priate safety and health practices and determine the applica-
measured maximum stirrer rotation rate, in dial divisions per
bility of regulatory limitations prior to use.
minute.
3.1.6 maximum fluidity temperature, n—as used in this test
2. Referenced Documents
method, the temperature at which stirrer rotation rate reaches a
2
2.1 ASTM Standards:
maximum value.
D2013/D2013M Practice for Preparing Coal Samples for
3.1.7 plastic range, n—difference between the solidification
Analysis
temperature and the initial softening temperatures.
D2234/D2234M Practice for Collection of a Gross Sample
3.1.8 solidification temperature, n—as used in this test
of Coal
method, the temperature at which the first zero DDPM is
reached after the last stirrer rotation.
3. Terminology
3.1 Definitions:
4. Summary of Test Method
3.1.1 breaking, v—free spinning behavior of coal, either by
4.1 The plastometer measures the plastic properties of coals
an abrupt change to rotating at maximum motor speed or by
by the use of a constantly applied torque on a stirrer placed in
abrupt changes in rotation, which occurs as a result of a molten
a crucible into which the coal is charged. The crucible is
immersed in a bath and the temperature increased uniformly.
The rates of movement of the stirrer are recorded in relation to
1
This test method is under the jurisdiction of ASTM Committee D05 on Coal
increase in temperature.
and Coke and is the direct responsibility of Subcommittee D05.15 on Metallurgical
Properties of Coal and Coke.
Current edition approved March 1, 2016. Published March 2016. Originally
5. Significance and Use
approved in 1967. Last previous edition approved in 2013 as D2639/D2639M–13.
DOI: 10.1520/D2639_D2639M-16.
5.1 Reliablevaluesoftheplasticpropertiesofcoalsareused
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
to predict or explain the behavior of a coal or blends during
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
carbonization or in other processes such as gasification,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. liquefaction, and combustion.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D2639/D2639M − 16
6. Apparatus 6.1.2 Retort Crucible, cylindrical, 21.4 mm 6 0.08 mm
[0.844 in. 6 0.003 in.] in inside diameter and 35.0 mm
6.1 Gieseler Plastometer—The apparatus shall consist of
[1.38 in.] in depth, with exterior threads for joining the crucib
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D2639/D2639M − 13 D2639/D2639M − 16
Standard Test Method for
Plastic Properties of Coal by the Constant-Torque Gieseler
1
Plastometer
This standard is issued under the fixed designation D2639/D2639M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers a relative measure of the plastic behavior of coal when heated under prescribed conditions. This
test method may be used to obtain semiquantitative values of the plastic properties of coals and blends used in carbonization and
in other situations where determination of plastic behavior of coals is of practical importance.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D2013/D2013M Practice for Preparing Coal Samples for Analysis
D2234/D2234M Practice for Collection of a Gross Sample of Coal
3. Terminology
3.1 Definitions:
3.1.1 breaking, v—free spinning behavior of coal, either by an abrupt change to rotating at maximum motor speed or by abrupt
changes in rotation, which occurs as a result of a molten ball of coal forming around the base of the stirrer, and which makes
reporting of the true maximum fluidity of the coal difficult.
3.1.2 dial division per minute, DDPM, n—as used in this test method, a measure of stirrer rotation rate. There are 100 dial
100 dial divisions for each full 360°360 ° rotation of the stirrer. Stirrer rotation rate is the total dial divisions turned by the stirrer
in a one minute time period.
3.1.3 initial softening temperature, n—as used in this test method, the temperature at which the stirrer rotation rate first reaches
1.0 dial divisions per minute.
3.1.4 jamming, v—swelling up of coal into the retort tube during the test, which may produce lower fluidity results than expected
and can only be noted after visual inspection of the disassembled crucible and retort at the conclusion of the test.
3.1.5 maximum fluidity, n—as used in this test method, the measured maximum stirrer rotation rate, in dial divisions per minute.
3.1.6 maximum fluidity temperature, n—as used in this test method, the temperature at which stirrer rotation rate reaches a
maximum value.
3.1.7 plastic range, n—difference between the solidification temperature and the initial softening temperatures.
3.1.8 solidification temperature, n—as used in this test method, the temperature at which the the first zero ddpmDDPM is
reached after the last stirrer rotation.
1
This test method is under the jurisdiction of ASTM Committee D05 on Coal and Coke and is the direct responsibility of Subcommittee D05.15 on Metallurgical Properties
of Coal and Coke.
Current edition approved Oct. 1, 2013March 1, 2016. Published December 2013March 2016. Originally approved in 1967. Last previous edition approved in 20082013
as D2639D2639/D2639M–08.–13. DOI: 10.1520/D2639_D2639M-13.10.1520/D2639_D2639M-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D2639/D2639M − 16
4. Summary of Test Method
4.1 The plastometer measures the plastic properties of coals by the use of a constantly applied torque on a stirrer placed in a
crucible into which the coal is charged. The crucible is immersed in a bath and the temperature increased uniformly. The rates of
movement of the stirrer are recorded in relation to increase in temperature.
5. Significance and Use
5.1 Reliable values of the plastic properties of coals are used to pre
...