ASTM D3997/D3997M-97(2009)
(Practice)Standard Practice for Preparing Coke Samples for Microscopical Analysis by Reflected Light
Standard Practice for Preparing Coke Samples for Microscopical Analysis by Reflected Light
SIGNIFICANCE AND USE
Briquettes of granular coke prepared in accordance with the laboratory procedures of this practice will have flat, scratch-free surfaces suitable for examination with a microscope using reflected light illumination. The polished surface of briquettes prepared using this practice will contain particles representative of the original gross sample.
Samples prepared by this practice are used for microscopical determination of the textural components in coke (see Test Method D5061).
SCOPE
1.1 This practice covers laboratory procedures for the preparation of granular samples of coke for examination with a reflected light microscope. The samples prepared are used for identifying and quantifying the textural components in coke. This practice does not apply to the preparation of oriented lump specimens of coke for structural analysis.
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.
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Standards Content (Sample)
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Designation:D3997/D3997M −97(Reapproved 2009)
Standard Practice for
Preparing Coke Samples for Microscopical Analysis by
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Reflected Light
This standard is issued under the fixed designation D3997/D3997M; 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 3.1.1 For additional definitions of terms used in this
practice, refer to Terminology D121.
1.1 This practice covers laboratory procedures for the
3.1.2 briquette, n—a cylindrical block composed of granu-
preparation of granular samples of coke for examination with
lated coal or coke particles compressed and embedded with an
areflectedlightmicroscope.Thesamplespreparedareusedfor
epoxy binder.
identifying and quantifying the textural components in coke.
Thispracticedoesnotapplytothepreparationoforientedlump
4. Summary of Practice
specimens of coke for structural analysis.
4.1 Arepresentativesampleiscrushedtoaspecifiedparticle
1.2 The values stated in either SI units or inch-pound units
size, oven-dried, mixed with a binder, and formed into a block
are to be regarded separately as standard. The values stated in
specimen referred to as a briquette. The briquette is then
each system may not be exact equivalents; therefore, each
polished to a flat, scratch-free surface for microscopical ex-
system shall be used independently of the other. Combining
amination under reflected light.
values from the two systems may result in non-conformance
with the standard.
5. Significance and Use
1.3 This standard does not purport to address all of the
5.1 Briquettesofgranularcokepreparedinaccordancewith
safety concerns, if any, associated with its use. It is the
the laboratory procedures of this practice will have flat,
responsibility of the user of this standard to establish appro-
scratch-free surfaces suitable for examination with a micro-
priate safety and health practices and determine the applica-
scope using reflected light illumination. The polished surface
bility of regulatory limitations prior to use.
of briquettes prepared using this practice will contain particles
representative of the original gross sample.
2. Referenced Documents
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5.2 Samples prepared by this practice are used for micro-
2.1 ASTM Standards:
scopical determination of the textural components in coke (see
D121Terminology of Coal and Coke
Test Method D5061).
D346 Practice for Collection and Preparation of Coke
Samples for Laboratory Analysis
6. Apparatus
D5061Test Method for Microscopical Determination of the
Textural Components of Metallurgical Coke
6.1 Grinder, Pulverizer, Mill, or Jaw Crusher, or other
E11Specification forWovenWireTest Sieve Cloth andTest
suitable equipment for final crushing of the sample to pass a
Sieves
2.36-mm (No. 8) sieve.
6.2 Coarse Riffle Sampler, with at least twelve divisions of
3. Terminology
1 3
notlessthan12.7mm[ ⁄2in.]andnotgreaterthan19.1mm[ ⁄4
3.1 Definitions:
in.].
6.3 Medium Riffle Sampler, with at least twelve divisions of
1 1
not less than 6.4 mm [ ⁄4 in.] and not greater than 12.7 mm [ ⁄2
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This practice is under the jurisdiction of ASTM Committee D05 on Coal and
in.].
Coke and is the direct responsibility of Subcommittee D05.28 on Petrographic
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Analysis of Coal and Coke.
6.4 Sieves—A6.4-mm [ ⁄4-in.] and 2.36-mm (No. 8) U.S.A.
Current edition approved Sept. 1, 2009. Published March 2010. Originally
Standard Sieve (see Specification E11).
approved in 1992. Last previous edition approved in 2004 as D3997–97(2004).
DOI: 10.1520/D3997_D3997M-97R09.
6.5 Molds—Containers to hold the coke/binder mixture
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
whilethebinderhardens.Generally,steelcylindricalmoldsare
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
used (see Fig. 1). However, it is acceptable to use other mold
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. materials that successfully yield the same type of briquette.
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D3997/D3997M−97 (2009)
7. Materials
7.1 Binder—Any binding material, such as epoxy resin,
fulfillingthefollowingrequirementsmaybeusedforpreparing
the coke briquette:
7.1.1 The binder shall hold all coke particles securely
during grinding, polishing, and observation.
7.1.2 The binder shall not react with the coke or the
atmosphere.
7.1.3 Under the microscope, the binder shall contrast mark-
edly with the coke being observed when immersed in oil.
7.1.4 The binder shall be su
...
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