ASTM D3038-93(1999)
(Test Method)Standard Test Method for Drop Shatter Test for Coke
Standard Test Method for Drop Shatter Test for Coke
SCOPE
1.1 This test method describes the application of two procedures for the determination of the property of coke of withstanding breakage when dropped under specified test conditions.
1.2 Procedure A , is used when the coke sample contains 50% or less of 100 mm (4 in.) after removal of coke smaller than 50 mm (2 in.). Procedure A appears in Sections 6, 7, 8 and 9.
1.3 Procedure B , is used when the coke sample contains more than 50% 100 mm (4 in.) after removal of coke smaller than 50 mm (2 in.). Procedure B appears in Sections 10, 11, 12 and 13.
1.4 The values stated in SI units shall be regarded as standard. Inch-pound units shall be accepted on an equivalent basis.
1.5 This standard does not purport to address all of the safety problems, 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: D 3038 – 93 (Reapproved 1999)
Standard Test Method for
Drop Shatter Test for Coke
This standard is issued under the fixed designation D 3038; 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 indications of the extent to which a given coke will break in
conventional transit and handling beyond the point of sam-
1.1 This test method describes the application of two
pling.
procedures for the determination of the property of coke of
withstanding breakage when dropped under specified test
4. Apparatus
conditions.
4.1 Shatter Apparatus, including (1) box, (2) base plate, (3)
1.2 Procedure A, is used when the coke sample contains
support frame, (4) containers, (5) sieves, and (6) weighing
50 % or less of 100 mm (4 in.) after removal of coke smaller
scales (see Fig. 1).
than 50 mm (2 in.). Procedure A appears in Sections 6-9.
4.1.1 Box, 455 mm (18 in.) in width, 710 mm (28 in.) in
1.3 Procedure B, is used when the coke sample contains
length, and 380 mm (15 in.) in depth. The bottom of the box
more than 50 % 100 mm (4 in.) after removal of coke smaller
shall consist of two doors, hinged lengthwise and provided
than 50 mm (2 in.). Procedure B appears in Sections 10-13.
with a trip latch for rapid opening. The doors are of 6-mm
1.4 The values stated in SI units shall be regarded as
( ⁄4-in.) plate and are mounted on freely working hinges so that
standard. Inch-pound units shall be accepted on an equivalent
they swing open rapidly and do not impede the fall of the coke.
basis.
The sides of the box are made of plate at least 3 mm ( ⁄8 in.)
1.5 This standard does not purport to address all of the
thick.
safety concerns, if any, associated with its use. It is the
4.1.2 Base Plate—Steel plate, 1.22 m (48 in.) in length, 965
responsibility of the user of this standard to establish appro-
mm (38 in.) in width, and not less than 13 mm ( ⁄2 in.) thick.
priate safety and health practices and determine the applica-
Vertical plates at least 200 mm (8 in.) high are placed on all
bility of regulatory limitations prior to use.
four sides to form a shallow box and to prevent loss of coke
2. Referenced Documents during the test. The back plate and side plates are rigidly fixed
while the front plate is made removable to facilitate shovelling
2.1 ASTM Standards:
the coke from the base plate into the box after each drop. It is
D 121 Terminology of Coal and Coke
2 important that the base plate be supported rigidly.
D 293 Test Method for Sieve Analysis of Coke
D 346 Practice for Collection and Preparation of Coke
NOTE 1—Mounting the base plate solidly on concrete is satisfactory.
Samples for Laboratory Analysis
4.1.3 Support Frame—A support frame and other appropri-
D 4621 Guide for Accountability and Quality Control in the
ate mechanism are provided so the box may be readily raised
Coal Analysis Laboratory
and lowered to fixed or reproducible upper and lower positions.
E 11 Specification for Wire-Cloth Sieves for Testing Pur-
No part of the supporting frame is to impede the free fall of
poses
coke nor protrude into the 1.22- by 0.965-m (48- by 38-in.)
E 323 Specification for Perforated-Plate Sieves for Testing
area of the base plate. When in the upper position, the inside
Purposes
surface of the bottom of the box must be 1.83 m (6 ft) above
the plate. The lower position shall be one convenient for
3. Significance and Use
loading and reloading the box without breakage of coke. The
3.1 The values determined in this test, when evaluated in
box may be constrained to only vertical movement by suitable
terms of pertinent experience with other cokes, may be used as
lateral guides and may be conveniently supported by wire rope
passing over pulleys. Counterweighting will reduce labor.
4.1.4 Containers—Conventional galvanized-iron tubs are
This test method is under the jurisdiction of ASTM Committee D-5 on Coal and
Coke and is the direct responsibility of Subcommittee D05.15 on Metalurgical convenient containers in which to collect and weigh coke in the
Properties of Coal and Coke.
various stages of the test.
Current edition approved Jan. 15, 1993. Published April 1993. Originally
published as D 3038 – 72. Last previous edition D 3038 – 93.
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.
D 3038
FIG. 1 Shatter Test Machine
4.1.5 Sieves—Woven-wire square-mesh sieves of the fol- 4.1.6 Weighing Scale—For Procedure A, a scale having a
lowing sizes: 150 mm (6 in.), 125 mm (5 in.), 100 mm (4 in.), capacity of 35 kg (75 lbs) is to be provided and be graduated
75 mm (3 in.), 50 mm (2 in.), 37.5 mm (1 ⁄2 in.), 25 mm (1 in.), so that it may be read directly, without interpolation, to 0.05 kg
and 12.5 mm ( ⁄2 in.). The sieves must conform to Specification (0.1 lbs). The sensitivity is to be not less than 0.025 kg (0.05
E11. lbs).
4.1.6.1 For Procedure B, this scale is to have a capacity of
NOTE 2—The 150-mm (6-in.) and the 125-mm (5-in.) sieves are not
60 kg (125 lbs) graduated to 0.1 kg (0.2 lbs) and have a
defined in Specifications E 11 but shall have nominal wire diameters of
sensitivity not less than 0.05 kg (0.10 lbs).
7.11 mm (0.2800 in.) and 6.73 mm (0.2650 in.), respectively, and have
permissible variations in average opening, permissible variations for not
5. Sampling
more than 5 % of openings, and maximum variation in individual
openings equivalent to that specified for the 100-mm (4-in.) sieve.
5.1 The gross sample of coke must be taken as close as
NOTE 3—For Procedure A in which the coke samples do not contain
possible to the point of interest, include all sizes, and be
more than 50 % plus 100-mm (4-in.) sizes, the 150-mm (6-in.), 125-mm
collected in such a way as to be representative of the total lot
(5-in.), and 100-mm (4-in.) sieves may be excluded. For Procedure B in
or quantity in question, in accordance with Practice D 346.
which the coke samples contain more than 50 % plus 100-mm (4-in.)
5.2 For Procedure A, the minimum size of the gross sample
sizes, it is permissible to exclude the 37.5-mm (1 ⁄2-in.), 25-mm (1-in.),
and the 12.5-mm ( ⁄2-in.) sieves. must be such as to yield 68 to 75 kg (150 to 165 lbs) of coke
D 3038
retained on 50-mm (2-in.) sieve when processed according to and counted as undersize if it will, in some position and
the procedure set forth in Section 7. without forcing, pass through the sieve. Proceeding in this way,
5.2.1 For Procedure B, this sample must be such as to yield and taking care in all operations to avoid breakage, separate the
at least 140 kg (300 lbs) of coke retained on 75-mm (3-in.) gross sample into the following fractions which are segregated
sieve when processed in accordance with the procedure set appropriately in tubs:
forth in Section 11.
Passing Retained on Percent
5.2.2 If experience shows that more than three tests are
__________________ 100-mm (4-in.) sieve ________
usually necessary, the quantity of gross sample will need to be
100-mm (4-in.) sieve 75-mm (3-in) sieve ________
increased appropriately.
75-mm (3-in.) sieve 50-mm (2-in.) sieve ________
50-mm (2-in.) sieve ________
5.3 The gross sample is to be assembled from increments
regularly and systematically collected, so that the entire quan-
7.3 Make appropriate weighings so that the percentage of
tity of coke sampled will be represented proportionately in the
each size in the portion of the original gross sample retained on
gross sample, and with such frequency that a gross sample of
a 50.8-mm (2-in.) sieve can be calculated.
at least the minimum required amount is collected.
7.4 Reconstitute each sample for testing (23 to 25 kg (50 to
5.4 Increments may be collected from a stopped conveyor
55 lbs)) from the segregated sizes above 50 mm (2 in.). Select
belt or by interposing a collecting container into a moving
pieces at random from the total amount of each size, the
stream while the coke is being loaded or unloaded or otherwise
quantity of each size fraction taken being based on the data of
transported. The increment collected from a stopped belt must
the preliminary size analysis.
be all the coke on the belt between parallel planes separated by
7.5 If the coke contains 5 % of moisture or less, test the
a distance 2.5 times the nominal top size of the coke. In the
sample as is. Wetter coke is to be dried to 5 % or less before
same way, when collecting from a moving stream, the collect-
testing.
ing container must be as wide as the stream, or be moved
uniformly through its whole width and have a mouth opening
8. Procedure
2.5 times the nominal top size of the coke. The nominal top
8.1 Weigh 23 to 25 kg (50 to 55 lbs) of the prepared
size, for this method, is that nearest standard sieve for which
reconstituted sample to the nearest 0.05 kg (0.1 lbs). Transfer
about 5 % of the coke is oversize.
the coke carefully into the box of the shatter test apparatus by
5.5 Samples collected from the surface of coke in piles,
either inserting the container into the box and allowing the
bins, cars, ships, or barges, are in general unreliable because of
coke to slide out or by removing the coke and placing it into the
size segregation and should not be used for determining
box by hand. Do not empty the container by tipping out the
conformance to specifications unless the purchaser and the
contents.
seller so agree. As it may be very difficult to collect a
8.2 Raise the box to the standard
...
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