ASTM E276-98
(Test Method)Standard Test Method for Particle Size or Screen Analysis at No. 4 (4.75-mm) Sieve and Finer for Metal-Bearing Ores and Related Materials
Standard Test Method for Particle Size or Screen Analysis at No. 4 (4.75-mm) Sieve and Finer for Metal-Bearing Ores and Related Materials
SCOPE
1.1 This test method covers the determination of the size distribution by screen analysis, dry or wet, of metal-bearing ores and related materials at No. 4 (4.75-mm) sieve and finer.
1.2 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: E 276 – 98
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Particle Size or Screen Analysis at No. 4 (4.75-mm) Sieve
1
and Finer for Metal-Bearing Ores and Related Materials
This standard is issued under the fixed designation E 276; 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 that sieve blinding does not occur. The wet screening technique
using liquid media may be used on any insoluble solids.
1.1 This test method covers the determination of the size
distribution by screen analysis, dry or wet, of metal-bearing
5. Significance and Use
ores and related materials at No. 4 (4.75-mm) sieve and finer.
5.1 This test method is intended to be used for compliance
1.2 This standard does not purport to address all of the
with compositional specifications for particle size distribution.
safety problems, if any, associated with its use. It is the
It is assumed that all who use this procedure will be trained
responsibility of the user of this standard to establish appro-
analysts capable of performing common laboratory practices
priate safety and health practices and determine the applica-
skillfully and safely. It is expected that work will be performed
bility of regulatory limitations prior to use.
in a properly equipped laboratory and that proper waste
2. Referenced Documents disposal procedures will be followed. Follow appropriate
quality control practices such as those described in Guide
2.1 ASTM Standards:
E 882.
E 11 Specification for Wire-Cloth Sieves for Testing Pur-
2
poses
6. Apparatus and Materials
E 882 Guide for Accountability and Quality Control in the
3 6.1 U.S. Standard Sieves, conforming to the requirements of
Chemical Analysis Laboratory
Specification E 11.
3. Terminology 6.2 Mechanical Sieve Shaker.
6.3 Drying Oven, of appropriate size and capable of main-
3.1 Definitions:
taining a uniform temperature at 110 6 5°C.
3.1.1 dry screening—screening of dry solids (dried at
6.4 Sample Splitter or Riffle with 25.4-mm (1-in.) opening.
110°C).
6.5 Scales and Weights, of adequate accuracy.
3.1.2 particle size—in screen testing, the smallest sieve
6.6 Pans, for holding samples.
aperture through which the particle has passed and the size of
6.7 Brass and Fiber Bristle Brushes, for cleaning sieves and
the following aperture through which the particle fails to pass.
pans.
3.1.3 sieve or screen—a plate, sheet or woven wire cloth, or
6.8 Special Apparatus, for wet screening, including deep-
other device, with regularly spaced square apertures of uniform
frame sieves.
size, mounted in a suitable frame or holder, for use in
6.9 Water or other liquid, for wet screening.
separating material according to size. The term sieve or screen
can be used interchangeably throughout.
7. Sample Preparation
3.1.4 wet screening—screening of wetted solids by a stream
7.1 If necessary, reduce the sample by riffling or other
of water or other liquids.
suitable means to obtain a test sample that will not overload the
4. Summary of Test Method sieves, and dry at 110 6 5°C to constant weight.
4.1 The sample is passed through a bank of standard sieves
NOTE 1—The size of the sample is very important in sieve analysis
by agitation. The dry screening technique described in this test because the number of particles on a sieve surface affects the probability
of any one particle passing through the sieve at a given time. The more
method may be used on any solid particles that can be dried so
particles there are on a sieve, the greater probability that any one particle
is hindered from getting into a position to pass through the opening. Avoid
1
This test method is under the jurisdiction of ASTM Committee E-1 on
overloading the sieves.
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct
7.2 Screen the test sample from 7.1 on a No. 4 (4.75-mm)
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
lurgical Materials.
sieve. Weigh the material retained on the No. 4 sieve.
Current edition approved Oct. 10, 1998. Published March 1999. Originally
published as E 276 – 65 T. Last previous edition E 276 – 93.
8. Preparation of Apparatus
2
Annual Book of ASTM Standards, Vol 14.02.
3
Annual Book of ASTM Standards, Vol 03.06. 8.1 Clean coarse sieves up to No. 80 (180 μm) with a soft
1
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NOTICE:¬This¬standard¬has¬either¬been¬superceded¬and¬replaced¬by¬a¬new¬version¬or¬discontinued.¬
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