ASTM D5061-19
(Test Method)Standard Test Method for Microscopical Determination of the Textural Components of Metallurgical Coke
Standard Test Method for Microscopical Determination of the Textural Components of Metallurgical Coke
SIGNIFICANCE AND USE
5.1 The determination of the volume percent of the textural components in coke is useful to characterize the optical properties of coke as it relates to utilization. Specifically, the technique has been used as an aid in determining coal blend proportions, and recognition of features present in the coke that can be responsible for coke quality or production problems such as reduced coke strength or difficulty in removing coke from commercial coke ovens, or both. The study of coke textures is also useful in promoting a better understanding of coke reactivity, and the relationship between coal petrography and its conversion to coke.5
5.2 This test method is used in scientific and industrial research, but not for compliance or referee tests.
SCOPE
1.1 This test method covers the equipment and procedures used for determining the types and amounts of coke carbon forms and associated recognizable coal- and process-derived textural components in metallurgical coke in terms of volume percent. This test method does not include coke structural components such as coke pores, coke wall dimensions, or other structural associations.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5061 − 19
Standard Test Method for
Microscopical Determination of the Textural Components of
1
Metallurgical Coke
This standard is issued under the fixed designation D5061; 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 Practice of Accuracy Values
1.1 This test method covers the equipment and procedures
3. Terminology
used for determining the types and amounts of coke carbon
forms and associated recognizable coal- and process-derived
3.1 Definitions—For additional definitions of terms used in
textural components in metallurgical coke in terms of volume
this test method, refer to Terminology D121.
percent. This test method does not include coke structural
3.2 Definitions of Terms Specific to This Standard:
componentssuchascokepores,cokewalldimensions,orother
3.2.1 anisotropic, adj—exhibiting optical properties of dif-
structural associations.
ferent values when viewed with an optical microscope having
1.2 The values stated in SI units are to be regarded as
mutuallyexclusivepolarizedlight,forexample,crossednicols.
standard. No other units of measurement are included in this
3.2.2 binder phase, n—a continuous solid carbon matrix
standard.
formed during the thermoplastic deformation of those coal
1.3 This standard does not purport to address all of the
macerals that become plastic during carbonization.
safety concerns, if any, associated with its use. It is the
3.2.2.1 Discussion—The binder phase material is formed
responsibility of the user of this standard to establish appro-
from the thermoplastic deformation of reactive (vitrinite and
priate safety, health, and environmental practices and deter-
liptinite) and semi-inert (semifusinite) coal macerals of metal-
mine the applicability of regulatory limitations prior to use.
lurgical bituminous coals. During thermoplasticity, the inert
1.4 This international standard was developed in accor-
coalmaceralandmineralarepartlyorwhollyincorporatedinto
dance with internationally recognized principles on standard-
thebinderphase.Also,mostofthecokeporesarelocatedinthe
ization established in the Decision on Principles for the
binder phase.
Development of International Standards, Guides and Recom-
3.2.3 carbon form, n—microscopically distinguishable car-
mendations issued by the World Trade Organization Technical
bonaceous textural components of coke, but excluding mineral
Barriers to Trade (TBT) Committee.
carbonates.
2. Referenced Documents
3.2.3.1 Discussion—Carbon forms are recognized on the
2
basisoftheirreflectance,anisotropy,andmorphology.Theyare
2.1 ASTM Standards:
derived from the organic portion of coal and can be anisotropic
D121 Terminology of Coal and Coke
or isotropic.
D3997/D3997M Practice for Preparing Coke Samples for
Microscopical Analysis by Reflected Light
3.2.4 circularanisotropicphase,n—agroupofbinder-phase
3
2.2 ISO Standard:
anisotropic carbon textures that are distinguished by approxi-
ISO 5725-6: 1994 Accuracy (Trueness and Precision) of
mately circular domains (that is length equals width) and
Measurement Methods and Results – Part 6: Use in
composed of fine circular (0.5 µm to 1.0 µm), medium circular
(1.0 µm to 1.5 µm), and coarse circular (1.5 µm to 2.0 µm) size
1
This test method is under the jurisdiction of ASTM Committee D05 on Coal
categories.
and Coke and is the direct responsibility of Subcommittee D05.28 on Petrographic
3.2.5 coke pore, n—a microscopically distinguishable void
Analysis of Coal and Coke.
Current edition approved March 15, 2019. Published June 2019. Originally
that is a structural element of coke.
approved in 1992. Last previous edition approved in 2016 as D5061 – 16. DOI:
3.2.5.1 Discussion—Coke pores are considered to be nearly
10.1520/D5061-19.
spherical-shaped voids created by the entrapment of gaseous
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
volatiles during the solidification of thermoplastic coal.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
However,othertypesofvoidscanbedistinguishedincokethat
the ASTM website.
include fractures or cracks, interconnected and elongated
3
Available from International Organization for Standardization (ISO), ISO
pores, and the open cell lumens of fusinite and semifusinite.
Central Secretariat, BIBC II, Chemin de Blandonnet 8, CP 401, 1214 Vernier,
Geneva, Switzerland
...
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: D5061 − 16 D5061 − 19
Standard Test Method for
Microscopical Determination of the Textural Components of
1
Metallurgical Coke
This standard is issued under the fixed designation D5061; 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 the equipment and procedures used for determining the types and amounts of coke carbon forms
and associated recognizable coal- and process-derived textural components in metallurgical coke in terms of volume percent. This
test method does not include coke structural components such as coke pores, coke wall dimensions, or other structural associations.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D121 Terminology of Coal and Coke
D3997/D3997M Practice for Preparing Coke Samples for Microscopical Analysis by Reflected Light
3
2.2 ISO Standard:
ISO 5725-6: 1994 Accuracy (Trueness and Precision) of Measurement Methods and Results – Part 6: Use in Practice of
Accuracy Values
3. Terminology
3.1 Definitions—For additional definitions of terms used in this test method, refer to Terminology D121.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 anisotropic, adj—exhibiting optical properties of different values when viewed with an optical microscope having
mutually exclusive polarized light, for example, crossed nicols.
3.2.2 binder phase, n—a continuous solid carbon matrix formed during the thermoplastic deformation of those coal macerals
that become plastic during carbonization.
3.2.2.1 Discussion—
The binder phase material is formed from the thermoplastic deformation of reactive (vitrinite and liptinite) and semi-inert
(semifusinite) coal macerals of metallurgical bituminous coals. During thermoplasticity, the inert coal maceral and mineral are
partly or wholly incorporated into the binder phase. Also, most of the coke pores are located in the binder phase.
1
This test method is under the jurisdiction of ASTM Committee D05 on Coal and Coke and is the direct responsibility of Subcommittee D05.28 on Petrographic Analysis
of Coal and Coke.
Current edition approved April 1, 2016March 15, 2019. Published April 2016June 2019. Originally approved in 1992. Last previous edition approved in 20072016 as
D5061 - 07.D5061 – 16. DOI: 10.1520/D5061-16.10.1520/D5061-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from International Organization for Standardization (ISO), ISO Central Secretariat, BIBC II, Chemin de Blandonnet 8, CP 401, 1214 Vernier, Geneva,
Switzerland, http://www.iso.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D5061 − 19
3.2.3 carbon form, n—microscopically distinguishable carbonaceous textural components of coke, but excluding mineral
carbonates.
3.2.3.1 Discussion—
Carbon forms are recognized on the basis of their reflectance, anisotropy, and morphology. They are derived from the organic
portion of coal and can be anisotropic or isotropic.
3.2.4 circular anisotropic phase, n—a group of binder-phase anisotropic carbon textures that are distinguished by approximately
circular domains (that is length equals width) and composed of fine circular (0.5(0.5 μm to 1.0-μm),1.0 μm), medium circular
(1.0(1.0 μm to 1.5-μm),1.5 μm), and coarse circular (1.5(1.5 μm t
...
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