ASTM E276-03
(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
SIGNIFICANCE AND USE
This test method is intended to be used for compliance with compositional specifications for particle size distribution. It is assumed that all who use this procedure will be trained analysts capable of performing common laboratory practices skillfully and safely. It is expected that work will be performed in a properly equipped laboratory and that proper waste disposal procedures will be followed. Follow appropriate quality control practices such as those described in Guide E 882.
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.
General Information
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Standards Content (Sample)
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Designation:E276–03
Standard Test Method for
Particle Size or Screen Analysis at No. 4 (4.75-mm) Sieve
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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 It is assumed that all who use this procedure will be trained
analysts capable of performing common laboratory practices
1.1 This test method covers the determination of the size
skillfully and safely. It is expected that work will be performed
distribution by screen analysis, dry or wet, of metal-bearing
in a properly equipped laboratory and that proper waste
ores and related materials at No. 4 (4.75-mm) sieve and finer.
disposal procedures will be followed. Follow appropriate
1.2 This standard does not purport to address all of the
quality control practices such as those described in Guide
safety problems, if any, associated with its use. It is the
E 882.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6. Apparatus and Materials
bility of regulatory limitations prior to use.
6.1 U.S. Standard Sieves, conforming to the requirements of
2. Referenced Documents Specification E 11.
6.2 Mechanical Sieve Shaker.
2.1 ASTM Standards:
6.3 Drying Oven, of appropriate size and capable of main-
E 11 Specification for Wire-Cloth Sieves for Testing Pur-
2
taining a uniform temperature at 110 6 5°C.
poses
6.4 Sample Splitter or Riffle with 25.4-mm (1-in.) opening.
E 135 Terminology Relating to Analytical Chemistry for
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6.5 Scales and Weights, of adequate accuracy.
Metals, Ores and Related Materials
6.6 Pans, for holding samples.
E 882 Guide for Accountability and Quality Control in the
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6.7 Brass and Fiber Bristle Brushes, for cleaning sieves and
Chemical Analysis Laboratory
pans.
3. Terminology
6.8 Special Apparatus, for wet screening, including deep-
frame sieves.
3.1 Definitions:
6.9 Water or other liquid, for wet screening.
For definitions of terms used in this test method, refer to
Terminology E 135.
7. Sample Preparation
4. Summary of Test Method 7.1 If necessary, reduce the sample by riffling or other
suitablemeanstoobtainatestsamplethatwillnotoverloadthe
4.1 The sample is passed through a bank of standard sieves
sieves, and dry at 110 6 5°C to constant weight.
by agitation. The dry screening technique described in this test
method may be used on any solid particles that can be dried so
NOTE 1—The size of the sample is very important in sieve analysis
thatsieveblindingdoesnotoccur.Thewetscreeningtechnique
because the number of particles on a sieve surface affects the probability
using liquid media may be used on any insoluble solids. of any one particle passing through the sieve at a given time. The more
particles there are on a sieve, the greater probability that any one particle
5. Significance and Use is hindered from getting into a position to pass through the opening.Avoid
overloading the sieves.
5.1 This test method is intended to be used for compliance
7.2 Screen the test sample from 7.1 on a No. 4 (4.75-mm)
with compositional specifications for particle size distribution.
sieve. Weigh the material retained on the No. 4 sieve.
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This test method is under the jurisdiction of ASTM Committee E01 on
8. Preparation of Apparatus
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct
8.1 Clean coarse sieves up to No. 80 (180 µm) with a soft
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
lurgical Materials.
brass wire brush and clean the finer sieves wtih a fiber brush.
Current edition approved June 10, 2003. Published November 2003. Originally
Clean by brushing the under side of the sieves. Gently tap the
approved in 1965. Last previous edition approved in 1998 as E 276 – 98.
brass frame to aid in freeing trapped particles.At times, it may
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Annual Book of ASTM Standards, Vol 14.02.
3
be necessary to wash the sieves in a warm soap and water
Annual Book of ASTM Standards, Vol 03.06.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E276–03
solution. After washing, dry the sieves thoroughly. If wet
W = mass passing the finest sieve, retained on a pan or
p
screening is to be used, nest selected special deep-frame sieves
filter, and
after cleaning as described.
W = total mass of all sieve fractions.
t
Obtain the percent cumulative by adding each percent
NOTE 2—As an alternative, ultrasonic
...
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