ASTM D4749-87

Standard Test Method for Performing the Sieve Analysis of Coal and Designating Coal Size

General Information

• Status: Historical
• Publication Date: 31-Dec-1986
• Technical Committee: D05 - Coal and Coke
• Drafting Committee: D05.07 - Physical Characteristics of Coal

Standards Content (Sample)

~~~ Designation: D 4749-87
Standard Test Method for
Performing the Sieve Analysis of Coal and Designating Coal
1
Size
This standard is issued under the fixed designation D 4749; 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 oflast reapproval. A
superscript epsilon(<) indicates an editorial change since the last revision or reapproval.
E 11 Specification for Wire-Cloth Sieves for Testing
1. Scope
4
Purposes
1.1 This test method covers procedures for determining
E 323 Specification for Perforated-Plate Sieves for Testing
the sieve analysis of coal and designating the size of coal
4
Purposes
from sieve analysis data. Raw as well as prepared (crushed,
2.2 Other Document:
cleaned or screened) coals can be tested by this test method.
Specification C-80 Commonwealth of Pennsylvania, De­
1.2 This test method explains how to designate coal sizes
partment of General Services, Bureau of Purchases,
from the results of sieve analysis data in order to represent
5
Specification for Coal:Anthracite
the condition of the coal as sold. In the case of special
mixtures or coals with noncontinuous ranges of sizes, a
3. Descriptions of Terms Specific to this Standard
sufficiently complete sieve analysis must be made to properly
describe the size distribution.
3.1 as-mined coal-same as ROM coal (3.8).
1.3 This test method is not applicable for determining the
3.2 as-shipped or produced coal-raw or prepared coal in
2
sieve analysis nor for designating the size of pulverized coal.
any state or condition at which it leaves the mine property or
Size fractions down to and including 38 J.Lm (No. 400 U.S.A.
loading facility.
Standard Series) can be treated by the methods discussed in
3.3 bottomsize, nominal-the sieve designating the lower
this test method. Methods for handling size fractions below
limit or bottomsize shall be that sieve of the series given in
38 J.Lm (No. 400) will be developed by this committee.
Section 6 with the largest openings through which passes a
1.4 The values stated in metric units shall be regarded as
total of less than 15 % of the sample. This defined
standard. The values shown in parentheses are provided for
bottomsize is not to be confused with the size of the smallest
information only. The values stated in each system may not
particles in the lot.
be exact equivalents; therefore, each system must be used
NOTE !-Precaution: In the case of a commercial, double-screened
independently of the other, without combining values in any
product, for example, 37.5 by 9.5 mm (l'h by lfs in.), this designation
way.
may not be valid. In such commercial or contractual situations, the
1.5 This standard may involve hazardous materials, oper­
amount of allowable material smaller than the bottomsize (for example,
ations, and equipment. This standard does not purport to 9.5 mm) must be specified by the contract under which the coal is
bought and sold.
address all of the safety problems associated with its use. It is
the responsibility of the user of this standard to establish
3.4 dry sieving-for the purposes of this test method, the
appropriate safety and health practices and determine the
test method for the sieving of coal after the sample has been
applicability of regulatory limitations prior to use.
air-dried under prescribed conditions; this is generally used
when testing with coal particles larger than 600 J.Lm. (No. 30
U.S.A. Standard Sieve Series.)
2. Referenced Documents
3.5 opening-for the purpose of this test method, open­
2.1 ASTM Standards: ings and apertures shall be regarded as synonomous terms.
D 197 Method of Sampling and Fineness Test of Pulver­ Dimensions for round and square openings shall be deter­
3
ized Coal mined as follows: for round holes, dimensions shall refer to
D 346 Method of Collection and Preparation of Coke the opening diameter; for square holes, dimensions shall
3
Samples for Laboratory Analysis refer to the distance between parallel wires.
3
D 388 Classification of Coals by Rank
3.6 prepared coal-any coal, regardless of its topsize, that
3
D 2013 Method of Preparing Coal Samples for Analysis
has been manually or mechanically cleaned. This includes
3
D 2234 Methods for Collection of a Gross Sample of Coal
coal that has been processed over a picking table or air tables,
D4371 Test Method for Determining the Washability
through a breaker, jig, or other device which segregates
3
Characteristics of Coal according to size or density (specific gravity).
3.7 raw coal-any coal, regardless of its topsize, that has
not been manually or mechanically cleaned. Crushed coal
1
This test method is under the jurisdiction of ASTM Committee D-5 on Coal
that has not been mechanically cleaned (including coal that
and Coke and is the direct responsibility of Subcommittee 005.07 on Physical
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