ASTM D197-87(2002)
(Test Method)Standard Test Method for Sampling and Fineness Test of Pulverized Coal
Standard Test Method for Sampling and Fineness Test of Pulverized Coal
SCOPE
1.1 This test method covers the determination of the fineness by sieve analysis of coal sampled from a dry pulverizing operation. It is not applicable to products of wet milling or to fines that have clustered into an agglomerated mass.
1.2 The values stated in inch-pound units shall be regarded as the standard. Sample weights of 1000 g or less shall be expressed in metric units.
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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Designation:D197–87(Reapproved 2002)
Standard Test Method for
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Sampling and Fineness Test of Pulverized Coal
This standard is issued under the fixed designation D 197; 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.
1. Scope 4.2 Drying Oven—A device for passing slightly heated air
over the sample. The oven should be capable of maintaining a
1.1 This test method covers the determination of the fine-
temperature of 18 to 27°F (10 to 15°C) above room tempera-
ness by sieve analysis of coal sampled from a dry pulverizing
ture with a maximum oven temperature of 104°F (40°C). Air
operation. It is not applicable to products of wet milling or to
changes should be at the rate of 1 to 4/min.
fines that have clustered into an agglomerated mass.
4.3 Sieves, square-hole, woven-wire cloth conforming to
1.2 The values stated in inch-pound units shall be regarded
SpecificationE11:
as the standard. Sample weights of 1000 g or less shall be
No. 8 USA Standard (2.36 mm)
expressed in metric units.
No. 16 USA Standard (1.18 mm)
1.3 This standard does not purport to address all of the
No. 30 USA Standard (600 µm)
safety concerns, if any, associated with its use. It is the
No. 50 USA Standard (300 µm)
No. 100 USA Standard (150 µm)
responsibility of the user of this standard to establish appro-
No. 200 USA Standard (75 µm)
priate safety and health practices and determine the applica-
No. 325 USA Standard (45 µm)
bility of regulatory limitations prior to use.
Thesieveframesshallbe8in.(203mm)indiameter,andthe
2. Referenced Documents height of the sieve from the top of the frame to the cloth shall
be either 2 in. (50.8 mm) or 1 in. (25.4 mm). Selection of
2.1 ASTM Standards:
specificsizesisoptional,dependingontheobjectiveofthetest.
E11 Specification for Wire-Cloth Sieves for Testing Pur-
2 4.3.1 Since the finer mesh sieves in particular are suscep-
poses
tible to damage by distortion resulting from undue pressure,
3. Significance and Use accidental scraping with hard brushes, etc., each sieve should
be closely inspected and discarded if it shows evidence of
3.1 This test method provides a means for assisting in the
damage.
evaluation of pulverizers and pulverizer systems in terms of
4.4 Mechanical Sieving Machine—The mechanical sieving
fineness specifications. It may also be used to confirm the
machine shall be designed to provide both a circular motion
influence of coal fineness on combustion performance and to
and a tapping action. It shall be designed to accept an assembly
evaluate carbon loss. By consent among interested parties, it
of vertically nested circular sieves as described in 4.3. The
may be used for evaluation of coal fineness in preparation,
machine action shall be such that results as described in
pneumatic transfer systems, etc.
Section 7 are obtained within the allotted time frame. Action
4. Apparatus
shall not be sufficiently severe to generate new fines by particle
degradation. To facilitate the sieving operation, a control
4.1 Sample Containers—Heavy vapor impervious bags,
switch device with timer is recommended. Other equipment
properly sealed, or noncorroding cans such as those with an
designs may be used provided the results are comparable.
airtight, friction top or screw top sealed with a rubber gasket
4.5 Balance, Laboratory—Approximately 1000-g capacity,
and pressure sensitive tape for use in storage and transport of
sensitivity 0.1 g.
the laboratory sample. Glass containers sealed with rubber
4.6 Sampling Device (Storage System)—An instrument
gaskets may be used, but care must be taken to avoid breakage
(scoop, dipper, or other suitable device) for collecting incre-
in transport.
ments that will constitute the total sample.
4.7 Sampling Device (Direct-Fired System)—Apparatus as
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described in 6.2.1 and 6.2.2.
This test method is under the jurisdiction of ASTM Committee D05 on Coal
and Coke, and is the direct responsibility of Subcommittee D05.07 on Physical
4.8 Sample Riffle with Pans—Amanual sample divider that
Characteristics of Coal.
splits the coal stream into a number of alternate elements.
Current edition approved Sept. 25, 1987. Published November 1987. Originally
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e1
Riffledivisionsshouldbeinthesizerangefrom ⁄4to ⁄2in.(6.4
published as D 197 – 24 T. Last previous edition D 197 – 87 (1994) .
2
Annual Book of ASTM Standards, Vol 14.02. to 12.7 mm).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D197–87 (2002)
5. Sampling, Storage System collect such samples from vertical pi
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