ASTM D3174-02e1

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e1
Designation: D 3174 – 02
Standard Test Method for
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Ash in the Analysis Sample of Coal and Coke from Coal
This standard is issued under the fixed designation D 3174; 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 (e) indicates an editorial change since the last revision or reapproval.
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e NOTE—Table 2 and sections 10.1.2, 10.1.2.1 and 10.1.2.2 were editorially corrected in June 2004.
1. Scope D 3176 Practice for Ultimate Analysis of Coal and Coke
D 3180 Practice for Calculating Coal and Coke Analyses
1.1 This test method covers the determination of the inor-
from As-Determined to Different Bases
ganic residue as ash in the analysis sample of coal or coke as
D 3682 Test Method for Major and Minor Elements in Coal
prepared in accordance with Method D 2013 or Practice D 346.
and Coke Ash by the Atomic Absorption Method
The results obtained can be applied as the ash in the proximate
E 691 Practice for Conducting an Interlaboratory Study to
analysis, Practice D 3172, and in the ultimate analysis, Practice
Determine the Precision of a Test Method
D 3176. For the determination of the constituents in ash,
reference is made to Test Methods D 2795 and D 3682. See
3. Summary of Test Method
Terminology D 121 for definition of ash.
3.1 Ash is determined by weighing the residue remaining
1.2 The values stated in SI units are to be regarded as the
after burning the coal or coke under rigidly controlled condi-
standard.
tions of sample weight, temperature, time, atmosphere, and
1.3 This standard does not purport to address all of the
equipment specifications.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Significance and Use
priate safety and health practices and determine the applica-
4.1 Ash, as determined by this test method, is the residue
bility of regulatory limitations prior to use.
remaining after burning the coal and coke. Ash obtained differs
in composition from the inorganic constituents present in the
2. Referenced Documents
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original coal. Incineration causes an expulsion of all water, the
2.1 ASTM Standards:
loss of carbon dioxide from carbonates, the conversion of iron
D 121 Terminology of Coal and Coke
pyrites into ferric oxide, and other chemical reactions. Ash, as
D 346 Practice for Collection and Preparation of Coke
determined by this test method, will differ in amount from ash
Samples for Laboratory Analysis
produced in furnace operations and other firing systems be-
D 388 Classification of Coals by Rank
cause incineration conditions influence the chemistry and
D 1756 Test Method for Determination as Carbon Dioxide
amount of the ash. References for correcting ash results
of Carbonate Carbon in Coal
determined by this test method to a mineral-matter-free basis
D 1757 Test Method for Sulfate Sulfur in Ash from Coal
are listed in Classification D 388, Section 8.
and Coke
D 2013 Method of Preparing Coal Samples for Analysis
5. Apparatus
D 2795 Test Methods for Analysis of Coal and Coke Ash
5.1 Electric Muffle Furnace for Coal or Coke—For deter-
D 3172 Practice for Proximate Analysis of Coal and Coke
mination of ash of coal, the furnace shall have an adequate air
D 3173 Test Method for Moisture in the Analysis Sample of
circulation and be capable of having its temperature regulated
Coal and Coke
at 700 to 750°C. The furnace shall be equipped with a
temperature indicator and means of controlling the temperature
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This test method is under the jurisdiction of ASTM Committee D05 on Coal within prescribed limits. Means shall be provided for main-
and Coke and is the direct responsibility of Subcommittee D05.21 on Methods of
taining air flow at a rate of two to four changes per minute (see
Analysis.
Fig. 1 and Fig. 2). Combustion gases shall be vented from
Current edition approved September 10, 2002. Published October 2002. Origi-
laboratory. Inlet and outlet ports shall be located and arranged
nally published as D 3174 – 73. Last previous edition D 3174 – 00.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
to distribute the air uniformly throughout the furnace area
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
without the possibility of sweeping solid particles from the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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D3174–02
(Suggested method for inducing regulated air flow through ashing furnace.)
FIG. 1 Air Aspirator
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