ASTM D5709-95(2000)e1
(Test Method)Standard Test Method for Sieve Analysis of Petroleum Coke
Standard Test Method for Sieve Analysis of Petroleum Coke
SCOPE
1.1 This test method details a procedure for performing particle size distribution analysis by dry sieve testing on green petroleum coke with a topsize of no more than 75 mm and calcined petroleum coke with a topsize of no more than 25 mm. Size fractions go down to and include 4.75 mm for green petroleum coke and 75 [mu]m for calcined petroleum coke. Note 1-To convert units see Table 1 from Specification E11. For example, 75 mm is approximately equivalent to a nominal sieve opening of 3 in. and 25 mm to a nominal sieve opening of 1 in. Likewise, 4.75 mm can be converted to approximately 0.187 in. and 75 microns to 0.0029 in.
1.2 Although the values stated in SI units are to be regarded as the standard, the sieve size is reported as U.S.A. standard test series in any units listed in Table 1 of Specification E11, or their commercial size equivalents.
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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An American National Standard
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Designation:D5709–95 (Reapproved 2000)
Standard Test Method for
Sieve Analysis of Petroleum Coke
This standard is issued under the fixed designation D 5709; 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.
e NOTE—Warning note was placed in the text in April 2000.
TABLE 1 Industry Typical Sieves
1. Scope
Calcined Petroleum Coke Green Petroleum Coke
1.1 This test method details a procedure for performing
25.0 mm 25.0 mm
particle size distribution analysis by dry sieve testing on green
19.0 mm 12.5 mm
petroleum coke with a topsize of no more than 75 mm and
12.5mm 4.75mm
calcinedpetroleumcokewithatopsizeofnomorethan25mm.
4.75 mm −4.75 mm
3.35 mm
Size fractions go down to and include 4.75 mm for green
2.36 mm
petroleum coke and 75 µm for calcined petroleum coke.
1.18 mm
600 µm
NOTE 1—To convert units see Table 1 from Specification E11. For
300 µm
example, 75 mm is approximately equivalent to a nominal sieve opening
212 µm
of 3 in. and 25 mm to a nominal sieve opening of 1 in. Likewise, 4.75 mm
150 µm
can be converted to approximately 0.187 in. and 75 microns to 0.0029 in.
75 µm
−75 µm
1.2 Although the values stated in SI units are to be regarded
as the standard, the sieve size is reported as U.S.A. standard
test series in any units listed in Table 1 of SpecificationE11,
or their commercial size equivalents.
3. Terminology
1.3 This standard does not purport to address all of the
3.1 Definitions of Terms Specific to This Standard:
safety concerns, if any, associated with its use. It is the
3.1.1 bulk sample—the reduced and divided representative
responsibility of the user of this standard to establish appro-
portion of the gross sample as prepared for shipment to and
priate safety and health practices and determine the applica-
received by a laboratory, to be prepared for analysis.
bility of regulatory limitations prior to use.
3.1.2 gross sample—the original, uncrushed, representative
portion taken from a shipment or lot of coke.
2. Referenced Documents
3.1.3 lot—a quantity of coke to be represented by a gross
2.1 ASTM Standards:
sample.
D 346 Practice for Collection and Preparation of Coke
3.1.4 representative sample—a sample collected in such a
Samples for Laboratory Analysis
manner that every particle in the lot to be sampled is equally
D 2013 Method of Preparing Coal Samples for Analysis
represented in the gross sample.
D 2234 Test Methods for Collection of a Gross Sample of
3.1.5 topsize—the size of the opening of that sieve of a
Coal
series with the smallest opening upon which is cumulatively
D 4057 Practice for Manual Sampling of Petroleum and
retained a total of less than 5 % of the sample. This defined
Petroleum Products
topsizeisnottobeconfusedwiththesizeofthelargestparticle
D 4749 Test Method for Performing SieveAnalysis of Coal
in a lot.
and Designating Coal Size
E11 Specification for Wire-Cloth Sieves for Testing Pur-
4. Summary of Test Method
poses
4.1 A representative coke sample is divided into ranges of
particle size by the use of a series of square-holed sieves.
This test method is under the jurisdiction of ASTM Committee D02 on
5. Significance and Use
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.05 on Properties of Fuels, Petroleum, Coke and Carbon Materials.
5.1 The test method concerns the sieving of coke into
Current edition approved April 15, 1995. Published June 1995.
designated size fractions for the purpose of characterizing the
Annual Book of ASTM Standards, Vol. 05.06.
3 material as to its particle size distribution. It requires the use of
Annual Book of ASTM Standards, Vol. 05.02.
Annual Book of ASTM Standards, Vol. 14.02. standard sieves, standard sampling methods, standard sample
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D5709–95 (2000)
preparationmethods,andaminimuminitialsamplemassbased 7.2.2 For sieving small quantities of coke or very fine coke
on lot topsize. Suggestions are given for industry typical sieve (below 70 mesh), use a laboratory type sieving machine.
stacks for both green and calcined petroleum coke.
5.2 Particle size distribution is significant in that many
TABLE 2 Initial Minimum Test Sample Mass Requirements for
physical characteristics of a coke are related to such a
Sieve Analysis
distribution including bulk density and surface area. Nuisance
Initial Sample Expected
characteristics, such as excessive fines in a lot, can also be
Topsize Type of Coke Mass Requirement, Relative
g Error, %
controlled.
75 mm Green 50,000 6
5.3 Results from this test method are useful in determining
50 mm Green 30,000 6
whether a coke lot meets purchase specifications, for classifi-
25 mm Green/Calcined 1,500 3
cation purposes, and for quality control. The results of this test
19 mm Green/Calcined 1,300 1
12.5 mm Green/Calcined 1,000 1
method can also be used to predict the performance of a
4.75 mm Green/Calcined 800 1
particular lot of coke in a process.
2.36 mm Green/Calcined 700 1
1.18 mm Green/Calcined 500 1
600 µm Green/Calcined 300 1
6. Interferences
300 µm Green/Calcined 100 1
A
6.1 A sieve analysis is very sensitive to the sieve cloth and 150 µm Green/Calcined 50 1
A
sievecloth-frameintegrity.Minorseparationsofthesievecloth
For topsize less than 150 µm, use an initial sample mass requirement of 50 g.
from the frame such as one broken sieve wire, and slight
distortions of sieve wires, can cause serious inaccuracies in the
8. Sample Preparation
final results of a sieve analysis.
6.2 Blinding of or a reduction in the number of openings in
8.1 A representative gross sample of the coke lot must be
a sieve due to a collection of particles caught in the mesh can
collected using appropriate procedures from Practice D 346,
introduce errors.
Test Methods D 2234, or Practice D 4057 (Warning—The
6.3 Flooding or overloading of any sieve with particles gross sample must not be crushed or reduced in topsize during
reduces the probability of any given particle encountering an the gross sample collection process or during subsequent
opening in the sieve. divisions of the sample.).
8.2 The gross sample is divided into a smaller bulk sample
7. Apparatus following guidelines inTest Methods D 2234.The bulk sample
must remain representative including no loss in topsize. Keep-
7.1 Sieves:
ing in mind the initial sample mass requirements (see Table 2),
7.1.1 Sieves will be used in a descending size opening
the bulk sample must be at least twice the largest minimum
sequence, larger mesh openings above smaller.
mass that you estimate will be required for the analysis.
7.1.1.1 TypicalsetsofsievestobeusedarelistedinTable1.
8.3 Upon delivery of the bulk sample to the laboratory, the
sample shall be stored in a safe, dry location. Prevent any size
NOTE 2—Sets of sieves are often modified. Typically, specifications on
sets of sieves are negotiated between the buyer and the seller. The actual degradation, loss of mass, or contamination of the sample until
sequence used by the operator performing the analysis can vary. For
needed for the sieve analysis.
example, intermediate sieves can be chosen to avoid sieve flooding and to
8.4 Immediately prior to the sieve analysis, examine the
make the sieving operation more efficient.Table 1 from SpecificationE11
bulk sample determining whether it is dry and free flowing. If
is to be used as a guide.
not, use the air drying apparatus and drying procedure of
7.1.2 A topsize sieve must be used. Method D 2013.
8.5 Determine the initial minimum test sample mass re-
7.1.3 Wire sieve cloth and frames used will conform to
quired for the analysis from Table 2.
SpecificationE11.
8.6 Reduce the bulk sample to the recommended minimum
7.1.4 Wire composition and types of frames must be sized
test sample mass required using the division methods outlined
properly for potential sieving operations. Stainless steel sieve
in Test Methods D 2234 or D 4749.
cloth is very resistant to distortion and preferred over softer
metals.
9. Procedure
7.1.5 Collecting pans and sieve covers designed to fit the
9.1 Accurately weigh the minimum test sample mass (see
sieves are required.
8.6) before sieving with a precision equal to or better than
7.1.6 Check SpecificationE11 for more details on standard
0.5 %ofthefractionbeingweighed.Thismassis M(initialtest
i
sieves, service checks, and calibration.
sample mass).
7.2 Sieve Shaker:
9.2 Start with the sieve having the largest required opening.
7.2.1 Use a batch type sieve shaker.
9.3 All sieving is to be done using a batch type sieve shaker.
5 6
A model number TS-1 Gils
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