ASTM D4749-87(2012)
(Test Method)Standard Test Method for Performing the Sieve Analysis of Coal and Designating Coal Size
Standard Test Method for Performing the Sieve Analysis of Coal and Designating Coal Size
SIGNIFICANCE AND USE
4.1 This test method concerns the sieving of coal into designated size fractions for the purpose of characterizing the material as to its particle size distribution for further processing or for commercial purposes. This is covered in Part A of this standard. Raw, as well as prepared (crushed, cleaned, or screened), coals can be tested by this test method.
4.2 This test method is applicable for all types of coals, except for pulverized coals (see Method D197) such as fed into steam boilers. Low rank coals, that is, lignites, subbituminous, and high volatile bituminous C, must be dried with caution and handled with care to minimize deterioration or size degradation during sieving.
4.3 This test method is applicable for the wet or dry-sieving of coal at sizes from 200 mm (8 in.) to 38 μm (No. 400 U.S.A. Standard). Methods for sizing materials below 38 μm are outside the scope of this test method.Note 2—The sizing of material that passes the 38 μm sieve is normally performed by optical microscopy, sedimentation, centrifugation, light scattering or obfuscation, surface area measurement, or other such methods. Subsieve techniques are also used sometimes.
4.4 This test method also concerns the designation of a coal sample as to its upper (nominal top-size) and lower (nominal bottom-size) limiting sizes for the purpose of characterizing the material for further processing or for commercial purposes. This is covered in Part B of this test method. Anthracite coal is further designated by a one word descriptive term (see 14.4).
4.5 Enough material may not be collected by this test method to meet subsequent test procedures, such as washability analyses (Test Method D4371). PART A. SIEVE ANALYSIS OF COAL
SCOPE
1.1 This test method covers procedures for determining the sieve analysis of coal and designating the size of coal from sieve analysis data. Raw as well as prepared (crushed, cleaned or screened) coals can be tested by this test method.
1.2 This test method explains how to designate coal sizes from the results of sieve analysis data in order to represent the condition of the coal as sold. In the case of special mixtures or coals with noncontinuous ranges of sizes, a sufficiently complete sieve analysis must be made to properly describe the size distribution.
1.3 This test method is not applicable for determining the sieve analysis nor for designating the size of pulverized coal. (See Note 1.) Size fractions down to and including 38 μm (No. 400 U.S.A. Standard Series) can be treated by the methods discussed in this test method. Methods for handling size fractions below 38 μm (No. 400) will be developed by this committee.Note 1—For powdered or pulverized coal as is fired into steam boilers, refer to Test Method D197.
1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. The values stated in each system may not be exact equivalents; therefore, each system must be used independently of the other, without combining values in any way.
1.5 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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Designation: D4749 − 87 (Reapproved 2012)
Standard Test Method for
Performing the Sieve Analysis of Coal and Designating Coal
1
Size
This standard is issued under the fixed designation D4749; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 2. Referenced Documents
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2.1 ASTM Standards:
1.1 This test method covers procedures for determining the
D197Test Method for Sampling and Fineness Test of
sieve analysis of coal and designating the size of coal from
Pulverized Coal
sieve analysis data. Raw as well as prepared (crushed, cleaned
D346Practice for Collection and Preparation of Coke
or screened) coals can be tested by this test method.
Samples for Laboratory Analysis
1.2 This test method explains how to designate coal sizes
D388Classification of Coals by Rank
from the results of sieve analysis data in order to represent the D2013Practice for Preparing Coal Samples for Analysis
condition of the coal as sold. In the case of special mixtures or D2234/D2234MPractice for Collection of a Gross Sample
of Coal
coals with noncontinuous ranges of sizes, a sufficiently com-
D3302Test Method for Total Moisture in Coal
plete sieve analysis must be made to properly describe the size
D4371Test Method for Determining the Washability Char-
distribution.
acteristics of Coal
1.3 This test method is not applicable for determining the
E11Specification forWovenWireTest Sieve Cloth andTest
sieve analysis nor for designating the size of pulverized coal.
Sieves
(See Note 1.) Size fractions down to and including 38 µm (No.
E323Specification for Perforated-Plate Sieves for Testing
400 U.S.A. Standard Series) can be treated by the methods
Purposes
discussed in this test method. Methods for handling size
2.2 Other Document:
fractions below 38 µm (No. 400) will be developed by this SpecificationC-80CommonwealthofPennsylvania,Depart-
committee. ment of General Services, Bureau of Purchases, Specifi-
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cation for Coal:Anthracite
NOTE1—Forpowderedorpulverizedcoalasisfiredintosteamboilers,
refer to Test Method D197.
3. Descriptions of Terms Specific to this Standard
1.4 The values stated in SI units are to be regarded as
3.1 as-mined coal—same as ROM coal (3.8).
standard. The values given in parentheses are for information
3.2 as-shipped or produced coal—raw or prepared coal in
only. The values stated in each system may not be exact
any state or condition at which it leaves the mine property or
equivalents; therefore, each system must be used indepen-
loading facility.
dently of the other, without combining values in any way.
3.3 bottomsize, nominal—the sieve designating the lower
1.5 This standard does not purport to address all of the
limit or bottomsize shall be that sieve of the series given in
safety concerns, if any, associated with its use. It is the Section 6 with the largest openings through which passes a
responsibility of the user of this standard to establish appro- total of less than 15% of the sample. This defined bottomsize
is not to be confused with the size of the smallest particles in
priate safety and health practices and determine the applica-
the lot. (Warning—In the case of a commercial, double-
bility of regulatory limitations prior to use.
1 3
screened product, for example, 37.5 by 9.5 mm (1 ⁄2 by ⁄8 in.),
1 2
This test method is under the jurisdiction of ASTM Committee D05 on Coal For referenced ASTM standards, visit the ASTM website, www.astm.org, or
and Coke and is the direct responsibility of Subcommittee D05.07 on Physical contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Characteristics of Coal. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Sept. 1, 2012. Published November 2012. Originally the ASTM website.
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approved in 1987. Last previous edition approved in 2007 as D4749–87 (2007). Available from Commonwealth of Pennsylvania, Dept. of General Services,
DOI: 10.1520/D4749-87R12. Bureau of Purchases, 414 N. Office Building, Harrisburg, PA 17125.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D4749 − 87 (2012)
this designation may not be valid. In such commercial or or for commercial purposes. This is covered in Part A of this
contractual situations, the amount of allowable material standard. Raw, as well as prepared (crushed, cleaned, or
smaller than the bottomsize (for example, 9.5 mm) must be screened), coals
...
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