ASTM E247-01
(Test Method)Standard Test Method for Determination of Silica in Manganese Ores, Iron Ores, and Related Materials by Gravimetry
Standard Test Method for Determination of Silica in Manganese Ores, Iron Ores, and Related Materials by Gravimetry
SCOPE
1.1 This test method covers the determination of silica in iron ores, iron ore concentrates and agglomerates, and manganese ore in the concentration range from 0.5 to 15%.
1.2 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 oi this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:E247–01
Standard Test Method for
Determination of Silica in Manganese Ores, Iron Ores, and
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Related Materials by Gravimetry
This standard is issued under the fixed designation E 247; 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 hydrochloric acid. Silica is separated by double dehydration
with perchloric acid. The two precipitates are combined,
1.1 This test method covers the determination of silica in
ignited,andweighed.Thesilicaisvolatilizedbytreatmentwith
iron ores, iron ore concentrates and agglomerates, and manga-
hydrofluoric and sulfuric acids and the residue weighed.
nese ore in the concentration range from 0.5 to 15 %.
1.2 This standard does not purport to address all of the
5. Significance and Use
safety concerns, if any, associated with its use. It is the
5.1 This test method is intended to be used for compliance
responsibility of the user oi this standard to establish appro-
with compositional specifications for silica content. It is
priate safety and health practices and determine the applica-
assumed that all who use these procedures will be trained
bility of regulatory limitations prior to use.
analysts capable of performing common laboratory procedures
2. Referenced Documents skillfully and safely. It is expected that work will be performed
in a properly equipped laboratory and that proper waste
2.1 ASTM Standards:
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disposal procedures will be followed. Appropriate quality
D 1193 Specification for Reagent Water
control practices must be followed such as those described in
E 50 Practices for Apparatus, Reagents, and Safety Precau-
3
Guide E 882.
tions for Chemical Analysis for Metals
E 135 Terminology Relating to Analytical Chemistry for
6. Interferences
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Metals, Ores and Related Materials
6.1 This test method is written for iron and manganese ores
E 691 Practice for Conducting an Interlaboratory Study to
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containing less than 0.25 % of fluorine. None of the elements
Determine the Precision of a Test Method
normallyfoundinironoresorinmanganeseoresinterferewith
E 877 PracticeforSamplingandSamplePreparationofIron
5 this test method.
Ores and Related Materials
E 882 Guide for Accountability and Quality Control in the
7. Apparatus
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Chemical Analysis Laboratory
7.1 Zirconium Crucible (50-mL capacity).
3. Terminology 7.2 Platinum Filter Cone.
3.1 Definitions—For definitions of terms used in this test
8. Reagents and Materials
method, refer to Terminology E 135.
8.1 Purity of Reagents—Reagent grade chemicals shall be
used in all tests. Unless otherwise indicated, it is intended that
4. Summary of Test Method
all reagents conform to the specifications of the Committee on
4.1 The sample is fused with sodium peroxide in a zirco-
Analytical Reagents of the American Chemical Society where
nium crucible. The melt is leached with water and dissolved in
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such specification are available. Other grades may be used,
provided it is first ascertained that the reagent is of sufficient
1 high purity to permit its use without lessening the accuracy of
This test method is under the jurisdiction of ASTM Committee E01 on
the determination.
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
lurgical Materials.
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Current edition approved November 10, 2001. Published November 2001. Reagent Chemicals, American Chemical Society Specifications, American
Originally published as E 247 – 64 T. Last previous edition E 247 – 96. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
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Annual Book of ASTM Standards, Vol 11.01. listed by the American Chemical Society, see Analar Standards for Laboratory
3
Annual Book of ASTM Standards, Vol 03.05. Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
4
Annual Book of ASTM Standards, Vol 14.02. and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
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Annual Book of ASTM Standards, Vol 03.06. MD.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E247
8.2 Purity of Water—Unless otherwise indicated, refer- dissolve soluble salts. Filter through a fine-textured paper with
ences to water shall be understood to mean reagent water as the aid of paper pulp and a platinum filter cone using suction.
defined by Type I of Specification D 1193. Wash filter 5 times with hot HCl (1 + 49) (8.4) and then 10
8.3 Hydrochloric Acid (sp gr 1.19)—Concentrated hydro- times with hot
...
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