BS 7020-5.1:1993
Current
The latest, up-to-date edition.
Analysis of iron ores. Methods for the determination of silicon content Gravimetric methods
Hardcopy , PDF
English
15-10-1993
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Committees responsible
National foreword
Method
1 Scope
2 Normative references
3 Principle
4 Reagents
5 Apparatus
6 Sampling and samples
7 Procedure
8 Expression of results
9 Test report
Annexes
A (normative) Flowsheet of the procedure for the
acceptance of analytical values for test samples
B (informative) Derivation of repeatability and
permissible tolerance equations
C (informative) Precision data obtained by
international analytical trials
Tables
1 Mass of test portion
B.1 Silicon contents of test samples
Figure
C.1 Least-squares fit of precision against X for
silicon
Two methods for the determination of silicon contents between 1% (m/m) and 15% (m/m) (with certain limitations) of iron ores.
| Committee |
W/-
|
| DevelopmentNote |
Supersedes BS 4158-3(1972) & 91/35108 DC Also numbered as ISO 2598-1 (09/2005) Reviewed and confirmed by BSI, October 2014. (09/2014)
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| DocumentType |
Standard
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| Pages |
14
|
| PublisherName |
British Standards Institution
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| Status |
Current
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| Supersedes |
This part of ISO 2598 specifies two gravimetric methods for the determination of the silicon content of iron ores.
These methods are applicable, with certain limitations, to silicon contents between 1 % (m/m) and 15 % (m/m) in natural iron ores, iron ore concentrates and agglomerates, including sinter products.
Method 1 is not applicable to iron ores having a content of reducing agents greater than 2 % (m/m), for instance pyrite, or to ores having a fluorine content greater than 0,1 % (m/m). It is recommended for lower grade ores having a high content of amphoteric elements.
Method 2 can be used for ores having a fluorine content greater than 0,1 % (m/m). It is recommended for high grade ores having a low content of gangue.
NOTE 1 For ores having a silicon content less than 5 % (m/m), the method specified in ISO 2598-2:–1), Iron ores – Determination of silicon content – Part 2: Reduced molybdosilicate spectrophotometric method, is preferable.
| BS 7020-2:1988 | Analysis of iron ores Method for the determination of hygroscopic moisture in analytical samples |
| BS 5660-1:1987 | Methods of sampling iron ores Manual method of increment sampling |
| BS 5660-2:2001 | Methods of sampling iron ores Sampling and sample preparation procedures |
| BS 7020-1:1988 | Analysis of iron ores Method for the preparation of pre-dried test samples for chemical analysis |
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