ASTM E1037-84(2004)
(Test Method)Standard Test Method for Measuring Particle Size Distribution of RDF-5
Standard Test Method for Measuring Particle Size Distribution of RDF-5
SIGNIFICANCE AND USE
The particle size distribution of RDF-5 strongly influences the storage and handling characteristics of the fuel. Small particles tend to block flow through storage bins and feed hoppers, although correct bin and hopper designs will alleviate this problem of blockage.
This test method of measuring size by hand allows accurate description of RDF-5 particle size distribution. Measurement by hand is superior to sieving techniques, wherein particles may be broken by the size separation technique itself. However, hand measurement is more time-consuming than sieving techniques.
SCOPE
1.1 This test method is used to determine the size distribution of a RDF-5 sample. Size is defined as the maximum length of the particle, where length is determined by the RDF-5 manufacturing process. That is, a pellet, cubette, or briquette all have a recognizable length. displays the sizes and shapes of some RDF-5 particles.
1.2 An air dried RDF-5 sample is separated into categories of differing particle sizes. The size distribution is measured as the weight percentage of each size category. A graph of a function of the cumulative fraction of material by weight finer than particle size versus particle size is plotted. From this plot are taken values which describe the size distribution-the uniformity constant and the characteristic particle size.
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:E1037–84 (Reapproved 2004)
Standard Test Method for
Measuring Particle Size Distribution of RDF-5
This standard is issued under the fixed designation E1037; 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.
1. Scope
1.1 This test method is used to determine the size distribu-
tionofaRDF-5sample.Sizeisdefinedasthemaximumlength
of the particle, where length is determined by the RDF-5
manufacturing process. That is, a pellet, cubette, or briquette
all have a recognizable length. Fig. 1 displays the sizes and
shapes of some RDF-5 particles.
1.2 An air dried RDF-5 sample is separated into categories
of differing particle sizes. The size distribution is measured as
the weight percentage of each size category. A graph of a
function of the cumulative fraction of material by weight finer
than particle size versus particle size is plotted. From this plot
are taken values which describe the size distribution—the
uniformity constant and the characteristic particle size.
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 appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
2. Terminology
2.1 Definition:
2.1.1 RDF-5—solid fuel derived from municipal solid
waste in which the processed combustible fraction is densified
(compressed) into the form of pellets, cubettes or briquettes.
FIG. 1 RDF-5 Sizes
3. Significance and Use
3.1 The particle size distribution of RDF-5 strongly influ-
4. Apparatus
encesthestorageandhandlingcharacteristicsofthefuel.Small
4.1 Labelled Containers, used to hold the particles which
particles tend to block flow through storage bins and feed
are separated by size. Appropriate containers are beakers or
hoppers, although correct bin and hopper designs will alleviate
pans labelled “$70 mm”, “$60 mm−<70 mm”, etc. The tare
this problem of blockage.
weight of each container shall be recorded to 0.1 g.
3.2 This test method of measuring size by hand allows
4.2 Scale, capable of weighing the sample and container
accurate description of RDF-5 particle size distribution. Mea-
with an accuracy of 0.1 g.
surement by hand is superior to sieving techniques, wherein
4.3 Vernier Calipers, a length-measuring instrument having
particles may be broken by the size separation technique itself.
an accuracy of 0.1 mm.
However, hand measurement is more time-consuming than
sieving techniques.
5. Procedure
5.1 The sample shall weigh 1.0 6 0.1 kg (2.2 6 0.2 lb)
unless otherwise specified. Record the weight of the sample to
This test method is under the jurisdiction of ASTM Committee D34 on Waste
ManagementandisthedirectresponsibilityofSubcommitteeD34.03onTreatment,
the nearest 0.1 g.
Recovery and Reuse.
5.2 Beginning with the largest particles, measure the length
Current edition approved Sept. 28, 2004. Published May 2004 Originally
of each particle in the sample. Separate the particles into
approved in 1984. Last previous edition approved in 1996 as E1037–84 (1996).
DOI: 10.1520/E1037-84R04. containers labelled as the size categories of less than 10 mm,
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