ASTM-E1037 › Historical Revision Information
Standard Test Method for Measuring Particle Size Distribution of RDF-5
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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. 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
FIG. 1 RDF-5 Sizes
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.
Keywords
Handling material; Hand measurement; Particle size distribution; Refuse-derived fuel (RDF); Storage--environmental materials
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19.120 (Particle size analysis. Sieving Including test sieves and porosimetry)
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Document Number
ASTM-E1037-84(2009)
Revision Level
1984 R09 EDITION
Status
Superseded
Modification Type
Reapproval
Publication Date
Nov. 1, 2009
Document Type
Test Method
Page Count
3 pages
Committee Number
D34.03