ASTM E247-01(2005)

Standard Test Method for Determination of Silica in Manganese Ores, Iron Ores, and Related Materials by Gravimetry

SIGNIFICANCE AND USE
This test method is intended to be used for compliance with compositional specifications for silica content. It is assumed that all who use these procedures will be trained analysts capable of performing common laboratory procedures 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. Appropriate quality control practices must be followed such as those described in Guide E 882.
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.

General Information

• Status: Historical
• Publication Date: 30-Apr-2005
• ICS: 73.060.10 - Iron ores
• ICS: 73.060.20 - Manganese ores
• Technical Committee: E01 - Analytical Chemistry for Metals, Ores, and Related Materials
• Drafting Committee: E01.02 - Ores, Concentrates, and Related Metallurgical Materials

Relations

• Replaces: ASTM E247-01 - Standard Test Method for Determination of Silica in Manganese Ores, Iron Ores, and Related Materials by Gravimetry
• Effective Date: 01-May-2005
• Replaced By: ASTM E247-01(2010) - Standard Test Method for Determination of Silica in Manganese Ores, Iron Ores, and Related Materials by Gravimetry
• Effective Date: 01-May-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:E247–01(Reapproved2005)
Standard Test Method for
Determination of Silica in Manganese Ores, Iron Ores, and
Related Materials by Gravimetry
This standard is issued under the fixed designation E247; 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 (´) 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:
disposal procedures will be followed. Appropriate quality
D1193 Specification for Reagent Water
control practices must be followed such as those described in
E50 Practices for Apparatus, Reagents, and Safety Consid-
Guide E882.
erations for Chemical Analysis of Metals, Ores, and
Related Materials
6. Interferences
E135 Terminology Relating to Analytical Chemistry for
6.1 This test method is written for iron and manganese ores
Metals, Ores, and Related Materials
containing less than 0.25 % of fluorine. None of the elements
E691 Practice for Conducting an Interlaboratory Study to
normallyfoundinironoresorinmanganeseoresinterferewith
Determine the Precision of a Test Method
this test method.
E877 Practice for Sampling and Sample Preparation of Iron
Ores and Related Materials for Determination of Chemical
7. Apparatus
Composition
7.1 Zirconium Crucible (50-mL capacity).
E882 Guide for Accountability and Quality Control in the
7.2 Platinum Filter Cone.
Chemical Analysis Laboratory
8. Reagents and Materials
3. Terminology
8.1 Purity of Reagents—Reagent grade chemicals shall be
3.1 Definitions—For definitions of terms used in this test
used in all tests. Unless otherwise indicated, it is intended that
method, refer to Terminology E135.
all reagents conform to the specifications of the Committee on
Analytical Reagents of the American Chemical Society where
4. Summary of Test Method
such specification are available. Other grades may be used,
4.1 The sample is fused with sodium peroxide in a zirco-
provided it is first ascertained that the reagent is of sufficient
nium crucible. The melt is leached with water and dissolved in
high purity to permit its use without lessening the accuracy of
the determination.
This test method is under the jurisdiction of ASTM Committee E01 on
8.2 Purity of Water—Unless otherwise indicated, refer-
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct
ences to water shall be understood to mean reagent water as
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal-
defined by Type I of Specification D1193.
lurgical Materials.
Current edition approved May 1, 2005. Published June 2005. Originally
approved in 1964. Last previous edition approved in 2001 as E247 – 01. DOI:
10.1520/E0247-01R05. Reagent Chemicals, American Chemical Society Specifications, American
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Chemical Society, Washington, DC, www.chemistry.org. For suggestions on the
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM testing of reagents not listed by the American Chemical Society, see the United
Standards volume information, refer to the standard’s Document Summary page on States Pharmacopeia and National Formulary, U.S. Pharmacopeial Convention,
the ASTM website. Inc. (USPC), Rockville, MD, http://www.usp.org.
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E247–01 (2005)
8.3 Hydrochloric Acid (sp gr 1.19)—Concentrated hydro- times with hot water, to remove all perchlorates (see Note 2).
chloric acid (HCl). Reserve the filtrate. Transfer filter paper and residue to a
8.4 Hydrochloric Acid (1 + 49)—Mix 1 volume of concen- platinum crucible.
trated HCl (sp gr 1.19) with 49 volumes of water.
NOTE 2—The residue must be washed free of perchlorates to prevent
8.5 Hydrofluoric Acid (48 %)—Concentrated hydrofluoric
possible loss of residue by deflagration during the ignition.
acid (HF).
11.3 Add 10 mL of HClO to the reserved filtrate. Cover
8.6 Perchloric Acid (70 %) (HClO ).
with a watchglass and take to dense white fumes and continue
8.7 Sodium Peroxide Powder (Na O ).
2 2
fuming for 15 to 20 min. Cool for 1 to 2 min. Add 50 mL of
8.8 Sulfuric Acid (1 + 1)—Carefully pour 1 volume of
water containing 2 mL of HCl (8.3). Heat the contents to
concentratedsulfuricacid(H SO ,spgr1.84)into1volumeof
2 4
dissolve soluble salts. Filter through a fine-textured paper with
water.
the aid of paper pulp and a platinum cone using suction. Wash
5 times with hot HCl (1 + 49) (8.4) and then 10 times with hot
9. Hazards
water (Note 2). Combine the filter and residue with the
9.1 For precautions to be
...