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ASTM D3174-02

(Test Method)

Standard Test Method for Ash in the Analysis Sample of Coal and Coke from Coal

Standard Test Method for Ash in the Analysis Sample of Coal and Coke from Coal

SCOPE
1.1 This test method covers the determination of the inorganic residue as ash in the analysis sample of coal or coke as prepared in accordance with Method D 2013 or Practice D 346. The results obtained can be applied as the ash in the proximate analysis, Practice D 3172, and in the ultimate analysis, Practice D 3176. For the determination of the constituents in ash, reference is made to Test Methods D 2795 and D 3682. See Terminology D 121 for definition of ash.
1.2 The values stated in SI units are to be regarded as 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.

General Information

Status
Historical
Publication Date
09-Sep-2002
ICS
75.160.10 - Solid fuels
Technical Committee
D05 - Coal and Coke
Drafting Committee
D05.21 - Methods of Analysis
Current Stage
Ref Project

Relations

Replaced By
ASTM D3174-02e1 - Standard Test Method for Ash in the Analysis Sample of Coal and Coke from Coal
Effective Date
10-Sep-2002

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ASTM D3174-02 - Standard Test Method for Ash in the Analysis Sample of Coal and Coke from Coal
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D3174–02
Standard Test Method for
1
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 (ε) indicates an editorial change since the last revision or reapproval.
3
1. Scope Determine the Precision of a Test Method
1.1 This test method covers the determination of the inor-
3. Summary of Test Method
ganic residue as ash in the analysis sample of coal or coke as
3.1 Ash is determined by weighing the residue remaining
preparedinaccordancewithMethodD 2013orPracticeD 346.
after burning the coal or coke under rigidly controlled condi-
The results obtained can be applied as the ash in the proximate
tions of sample weight, temperature, time, atmosphere, and
analysis, Practice D 3172, and in the ultimate analysis, Practice
equipment specifications.
D 3176. For the determination of the constituents in ash,
reference is made to Test Methods D 2795 and D 3682. See
4. Significance and Use
Terminology D 121 for definition of ash.
4.1 Ash, as determined by this test method, is the residue
1.2 The values stated in SI units are to be regarded as the
remaining after burning the coal and coke.Ash obtained differs
standard.
in composition from the inorganic constituents present in the
1.3 This standard does not purport to address all of the
original coal. Incineration causes an expulsion of all water, the
safety concerns, if any, associated with its use. It is the
loss of carbon dioxide from carbonates, the conversion of iron
responsibility of the user of this standard to establish appro-
pyrites into ferric oxide, and other chemical reactions. Ash, as
priate safety and health practices and determine the applica-
determined by this test method, will differ in amount from ash
bility of regulatory limitations prior to use.
produced in furnace operations and other firing systems be-
cause incineration conditions influence the chemistry and
2. Referenced Documents
amount of the ash. References for correcting ash results
2.1 ASTM Standards:
2 determined by this test method to a mineral-matter-free basis
D 121 Terminology of Coal and Coke
are listed in Classification D 388, Section 8.
D 346 Practice for Collection and Preparation of Coke
2
Samples for Laboratory Analysis
5. Apparatus
2
D 388 Classification of Coals by Rank
5.1 Electric Muffle Furnace for Coal or Coke—For deter-
D 1756 Test Method for Determination as Carbon Dioxide
2 mination of ash of coal, the furnace shall have an adequate air
of Carbonate Carbon in Coal
circulation and be capable of having its temperature regulated
D 1757 Test Method for Sulfate Sulfur in Ash from Coal
2 at 700 to 750°C. The furnace shall be equipped with a
and Coke
temperature indicator and means of controlling the temperature
2
D 2013 Method of Preparing Coal Samples for Analysis
2 within prescribed limits. Means shall be provided for main-
D 2795 Test Methods for Analysis of Coal and Coke Ash
taining air flow at a rate of two to four changes per minute (see
2
D 3172 Practice for Proximate Analysis of Coal and Coke
Fig. 1 and Fig. 2). Combustion gases shall be vented from
D 3173 Test Method for Moisture in theAnalysis Sample of
laboratory. Inlet and outlet ports shall be located and arranged
2
Coal and Coke
2 to distribute the air uniformly throughout the furnace area
D 3176 Practice for Ultimate Analysis of Coal and Coke
without the possibility of sweeping solid particles from the
D 3180 Practice for Calculating Coal and Coke Analyses
2 capsules. The temperature over the entire working area of the
from As-Determined to Different Bases
furnace floor shall be maintained within the specified tempera-
D 3682 Test Method for Major and Minor Elements in Coal
2 ture limits.
and Coke Ash by the Atomic Absorption Method
7
5.2 Porcelain Capsules, about 22 mm ( ⁄8 in.) in depth, and
E 691 Practice for Conducting an Interlaboratory Study to
3
44 mm (1 ⁄4 in.) in diameter, or similar shallow dishes or
platinum crucibles.
1
5.3 Balance, sensitive to 0.1 mg.
This test method is under the jurisdiction of ASTM Committee D05 on Coal
and Coke and is the direct responsibility of Subcommittee D05.21 on Methods of
5.4 Crucible Cover, aluminum, porcelain, or similar covers.
Analysis.
Current edition approved September 10, 2002. Published October 2002. Origi-
nally published as D 3174 – 73. Last previous edition D 3174 – 00.
2 3
Annual Book of ASTM Standards, Vol 05.06. Annual Book of ASTM Standards, Vol 14.02.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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5.1 A compositional analysis of coal and coke and their associated combustion residues are often useful in assessing their quality. Knowledge of the elemental composition of the associated residues is also useful in predicting the elemental enrichment/depletion compositional behavior of ashes and slags in comparison to the mass fraction in the parent coal. Utilization of the ash by-products and hazardous potential may also depend on the chemical composition and leachability of the inorganic constituents of the coal ash.  
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